CHANGSTAR: Audiophile Headphone Reviews and Early 90s Style BBS

Lobby => Headphone Measurements => Topic started by: Marvey on November 07, 2014, 06:15:34 AM

Title: AKG 7XX (Massdrop) Measurement and Succinct Review
Post by: Marvey on November 07, 2014, 06:15:34 AM
OK, it's really the AKG 7XX, but I thought seven triple-X sounded more interesting. A huge huge thanks to Massdrop Will+Danny for supporting our community. Yes, the box actually says 7XX. I cannot confirm or deny if it is the 702 or 712 or 701. I really don't know. I'm not sure how much this unit is going to drop for, but I'm getting some indications this might be quite the deal considering what I am about to say.

I'm going to be very straightforward with this one. Taking into account what I think the drop price may be, I really love this headphone. It is not perfect, there are some minor issues, but overall it is well balanced and works for a variety of music. It even passed the MFSL Nirvana Lithium test. Those of you may recall years ago when I listened to this same track with K550s (the early ones with the spiked treble) and had to jump out of my seat and rip them off my head. Well I assure you this is not the case here.

The 7XX do not sound lean or cold like the early K701s. The 7XX has a warm full bodied sound with a slight hint of glare on metal percussion. There's definitely a broad elevation in the bass the balances out and helps mask a lower-mid treble bump. Even then, the nature of the bump seems mild. It's evident, but isn't difficult. And the rest of the treble is on the rough side, it could be smoother, just not as smooth as a high quality silk dome tweeter. I'm just nitpicking here. That's what I do.

Overall, I really do like the K701's tonal balance. However, what impresses me even more is it's resolving capability. It's pretty darn good. Good articulation. Good attack. Good clarity except in the deepest bass. These are the traits that I know drew lots of people to the K701. The last headphone I had my hands on was the Z7, and the Z7, even with mods, sounded soft in comparison.

It's late, and instead of teasing you guys, I'll just post some quick measurements. Just a sec.

1/27/2015 update:

Q: Now that the hyper is over, how to the K7XX compare against the venerable HD600?
A: K7XX are complementary / different from HD600. Better quality bass, but poorer treble, no upper vocal peakage, but lower treble peakage. It's really going to depend upon your sensibilities. Personally, I've opted for the K7XX (I had to chance to get the HD600). There are good arguments either way.

MEASUREMENTS: http://www.changstar.com/index.php/topic,1902.msg51365.html#msg51365 (http://www.changstar.com/index.php/topic,1902.msg51365.html#msg51365)
CSD COMPARISON TO K701: http://www.changstar.com/index.php/topic,1902.msg51384.html#msg51384 (http://www.changstar.com/index.php/topic,1902.msg51384.html#msg51384)
INITIAL THOUGHTS FROM LFF: http://www.changstar.com/index.php/topic,1902.msg51847.html#msg51847 (http://www.changstar.com/index.php/topic,1902.msg51847.html#msg51847)
L+R FR OVERLAY: http://www.changstar.com/index.php/topic,1902.msg52510.html#msg52510 (http://www.changstar.com/index.php/topic,1902.msg52510.html#msg52510)
UB MEASUREMENT (more open baffle): http://www.changstar.com/index.php/topic,1902.msg53997.html#msg53997 (http://www.changstar.com/index.php/topic,1902.msg53997.html#msg53997)
PERVENETS THOUGHTS: http://www.changstar.com/index.php/topic,1902.msg55054.html#msg55054 (http://www.changstar.com/index.php/topic,1902.msg55054.html#msg55054)
HANS MEASUREMENTS: http://www.changstar.com/index.php/topic,1902.msg56970.html#msg56970 (http://www.changstar.com/index.php/topic,1902.msg56970.html#msg56970)
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review.
Post by: Marvey on November 07, 2014, 06:18:38 AM
L measurements

Little bump at 7-8k. It looks worse than it sounds. As I surmised, the warmth - broad bass elevation balances out the treble. The second explanation is that the CSDs are really clean. There's no long lasting ridge at 7-8kHz. No nasty ringing. Also there's some loose correlation that clean floor = plankton.

The dip at 3-4k is partially a measurement artifact. There is a little bit of depression here (which could actually be desirable - makes vocals less shrill.) See Hans and UB measurements.

I'll post R measurements and photos tomorrow.

BTW. These are also going to Luis and Gil. They can give you guys their take on it.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Anaxilus on November 07, 2014, 06:20:57 AM
So Z7 or 7Vin Diesel?
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: ultrabike on November 07, 2014, 06:26:30 AM
Kool! Seems like a warmer and more resolving version of the K701, which is IMO a positive.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: takato14 on November 07, 2014, 06:26:52 AM
These are not on google at all, where the fuck do you get these??
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: ultrabike on November 07, 2014, 06:29:51 AM
(http://cdn.meme.am/instances/500x/51554599.jpg)

... and proly Massdrop eventually...
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: LFF on November 07, 2014, 06:30:42 AM
Kool! Seems like a warmer and more resolving version of the K701, which is IMO a positive.

Agreed. Really curious about these now.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: purplegoat on November 07, 2014, 07:52:16 AM
mid range dip looks killer to me personally (and is on the K712). thanks for sharing the measurements, excited to see what drops!
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: altrunox on November 07, 2014, 11:26:20 AM
So in short, while the K70x is "love this sweet baby" or "hate this great BS", the K7XXX is "love this baby" or just "I'm ok with you baby"?
Really interesting.

The headband has that great bumps or is something like the K702 anniversaries?
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: thegunner100 on November 07, 2014, 03:33:07 PM
It still has the 2khz bump that the other akgs have. Is it noticeable on these?
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Marvey on November 07, 2014, 03:54:42 PM
I didn't hear in at all. Here is a comparison graph of the CSD from the K701. Seems to gel with what I am hearing. The K701 has bump at 2k and a continuing decay before it settles. The K7XX does not have that ridge.

I also do wonder if the 4kHz dip is a measurement artifact to some extent. Some headphones, e.g. HE-500 have a dip around a similar region. It's usually related to the inner diameter of the pads. I'll take a free air measurement to see what happens.

(http://www.changstar.com/index.php?action=dlattach;topic=148.0;attach=2150;image)

(http://www.changstar.com/index.php?action=dlattach;topic=1902.0;attach=7928;image)
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: donunus on November 07, 2014, 04:14:13 PM
Great timing. My Q701 should be here soon. I hear they are great even out of the Vali
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Colgin on November 07, 2014, 04:42:13 PM
OK, it's really the AKG 7XX, but I thought seven triple-X sounded more interesting. A huge huge thanks to Massdrop Will+Danny for supporting our community. Yes, the box actually says 7XX. I cannot confirm or deny if it is the 702 or 712 or 701. I really don't know.[/font]

Do the headphones have orange trim. If so, it should be the K712.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: fishski13 on November 07, 2014, 04:47:48 PM
call me sooper stoked (as i sit here listening to my K701).
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Marvey on November 07, 2014, 04:52:41 PM
OK, it's really the AKG 7XX, but I thought seven triple-X sounded more interesting. A huge huge thanks to Massdrop Will+Danny for supporting our community. Yes, the box actually says 7XX. I cannot confirm or deny if it is the 702 or 712 or 701. I really don't know.[/font]

Do the headphones have orange trim. If so, it should be the K712.

The headphone is white. No orange trim. But it does not sound like K701. Will take pix tonight or later today.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: donunus on November 07, 2014, 04:53:43 PM
Marvey, Do you have a pic so that we can see which 7xx this mystery can is  :)p3
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: cizx on November 07, 2014, 04:54:23 PM
The original(ish?) white K701 was my second pair of decent headphones back in '07... I used them with an Alien DAC and a Little Dot MK V solid state amp.  I am, therefore, nostalgically intrigued by these.  If Massdrop has them at a reasonable price, I'll jump on.  See how they sound out of Vali and Ragnarok.  :)p7
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Colgin on November 07, 2014, 04:57:13 PM
The headphone is white. No orange trim. But it does not sound like K701. Will take pix tonight or later today.

Hmm, white. Well, it could be a totally new phone. In which case,  :-0., special mass drop edition to add to the many K/Q7xx variants. Or it could be this, a white Q701:

(http://www.baza-shop.ru/data/products/images/7/1/akg_q701_white_original.jpg)

Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Colgin on November 07, 2014, 05:02:34 PM
I'm going to be very straightforward with this one. Taking into account what I think the drop price may be, I really love this headphone. It is not perfect, there are some minor issues, but overall it is well balanced and works for a variety of music. It even passed the MFSL Nirvana Lithium test. Those of you may recall years ago when I listened to this same track with K550s (the early ones with the spiked treble) and had to jump out of my seat and rip them off my head. Well I assure you this is not the case here.

The 7XX do not sound lean or cold like the early K701s. The 7XX has a warm full bodied sound with a slight hint of glare on metal percussion. There's definitely a broad elevation in the bass the balances out and helps mask a lower-mid treble bump. Even then, the nature of the bump seems mild. It's evident, but isn't difficult. And the rest of the treble is on the rough side, it could be smoother, just not as smooth as a high quality silk dome tweeter. I'm just nitpicking here. That's what I do.

OK, putting aside price/value considerations (I suspect the drop price will be less than the street price for the cans I am going to mention), how would you say the K7xx stacks up against the Senn HD600 or HD650.  Thanks.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Will on November 07, 2014, 07:31:04 PM
Guys shhhhhhhh! This is supposed to be a secret : )
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: M3NTAL on November 07, 2014, 08:32:42 PM
Good looking measurements. The K701 was my first "High-End" headphone that just never sounded right to me. I've only revisited AKG with the K1000 and K501 for short periods of time. The 701 left a bad taste in my wallet :D

Please no white or neon green on a $XXX.XX headphone!
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: donunus on November 07, 2014, 10:38:20 PM
M3ntal, I hated the k701 before as well but that old one had some ringing issues unlike this one.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Marvey on November 07, 2014, 10:45:51 PM
how would you say the K7xx stacks up against the Senn HD600 or HD650.  Thanks.

I'd put them on par with the HD600s. I disliked the K701 for its tonal balance (too thin, slightly upward / lack of gentle downward slope toward the highs), but I never thought its technical capabilities in terms of resolution, clarity, etc. were lacking.

The Q701, with its warmer presentation, was the AKG that started to make me change my mind about the potential of the *7* series, but I never followed up by obtaining one, listening to it, measuring it. Like many others here, the K701 completely turned me off to the AKG *7* series for a long time. I just didn't and couldn't take that line seriously. Back then, I was even stupid enough to burn it in with a combination of drum tracks, white noise, pink noise, etc. for 440 hours because a few morons on HF said that's what I needed to do. (I acknowledge my idiocy.) At the end, I returned them to HeadRoom. That really seared into my brain how much I hated K701 and by association *7*. (The AKG marketing squad should have renamed them much more differently to denote the different sound.)

Both HD600 and K7XXX are different than one truly better than the other. Both are very solid mid-fi headphones with different strengths and weaknesses. Nitpicking, the HD600 has got that forwardness with the vocals, that shoutyness. The K7XXX has hint of glare and stridency. The K7XXX is crisper with better delineation of edges, but the HD600 is smoother and not as rough. Honestly, this is a situation where I would really need to line both of them up side by side to say with certainty the extent of the differences.

More later on this tonight... Let me dig up some old data.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Kamaka on November 07, 2014, 11:01:09 PM
Mid-fi seems to such me in every time. I'll likely end upupith a pair. Having reread the posts, I didn't notice any information about the headband. Is it the bumpy headband? I'm really hoping the answer is no.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Colgin on November 08, 2014, 05:50:10 AM
I'd put them on par with the HD600s. I disliked the K701 for its tonal balance (too thin, slightly upward / lack of gentle downward slope toward the highs), but I never thought its technical capabilities in terms of resolution, clarity, etc. were lacking.

The Q701, with its warmer presentation, was the AKG that started to make me change my mind about the potential of the *7* series, but I never followed up by obtaining one, listening to it, measuring it. Like many others here, the K701 completely turned me off to the AKG *7* series for a long time. I just didn't and couldn't take that line seriously. Back then, I was even stupid enough to burn it in with a combination of drum tracks, white noise, pink noise, etc. for 440 hours because a few morons on HF said that's what I needed to do. (I acknowledge my idiocy.) At the end, I returned them to HeadRoom. That really seared into my brain how much I hated K701 and by association *7*. (The AKG marketing squad should have renamed them much more differently to denote the different sound.)

Both HD600 and K7XXX are different than one truly better than the other. Both are very solid mid-fi headphones with different strengths and weaknesses. Nitpicking, the HD600 has got that forwardness with the vocals, that shoutyness. The K7XXX has hint of glare and stridency. The K7XXX is crisper with better delineation of edges, but the HD600 is smoother and not as rough. Honestly, this is a situation where I would really need to line both of them up side by side to say with certainty the extent of the differences.

More later on this tonight... Let me dig up some old data.

Would be interested to hear if the K7xxxx is a decided improvement over the Q701 that I already own and enjoy. I have avoided the K712 without hearing fist because I think it may not be enough o f an improvement over what I already have to justify the $200 or more delta to trade up. OTOH, I would love an AKG that was basically the Q701 with just a slightly punchier bass and a little less strident treble.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: firev1 on November 08, 2014, 11:32:47 AM
Given its by AKG, wonder how close is it to the Olive-Welti stuff? Looks fantastic, was contemplating about the Q701 but never got it in place of the HD800. Any impressions on scalability and technicalities compared to the 600s if any?
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Marvey on November 08, 2014, 04:00:56 PM
Given its by AKG, wonder how close is it to the Olive-Welti stuff? Looks fantastic, was contemplating about the Q701 but never got it in place of the HD800. Any impressions on scalability and technicalities compared to the 600s if any?

This scales about as well as HD600 in technicalities. Got good returns with Rag + Theta Gen V.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Marvey on November 08, 2014, 04:04:48 PM
Posted crappy pix in first post. I lied. The headphone is black. No bumpy headband.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Clemmaster on November 08, 2014, 04:15:06 PM
The description on the sheet and look match the K712 pro's. http://www.akg.com/K712+PRO-827.html?pid=1408

I'm sure it's the plastic paper that makes it sound so great!
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: briskly on November 08, 2014, 04:28:57 PM
It has the same bass boost blurb on the back, and the FR looks very much like the K712. Looks like the latest in AKG's game of switching around letters, numbers, and branding of the K701.
Though, where does that leave the K712 in this model nonsense?
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: firev1 on November 08, 2014, 05:00:10 PM
They have a million, can't even keep track anymore, anniversary models with spescal tuning, Q701, uggh.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Marvey on November 08, 2014, 06:06:17 PM
They do sound good though. We'll see how much they drop for.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Hands on November 08, 2014, 06:42:18 PM
Yeah, looks like this is some sort of K702 65th AE or K712 variant. I'd love to give them a shot if you or anyone else would be up to shipping them my way, though if they are like the K702 65th AE, I'll probably find the upper-mids and treble to be problematic for my tastes.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Anaxilus on November 08, 2014, 06:48:52 PM
From AKG Quincy Jones to AKG Vin Diesel!  Yeah boy!  :)p1
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: altrunox on November 08, 2014, 07:53:27 PM
looks like an all black K702 annies.
Fingers crossed for US$150  :)p1 :)p6
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: DrForBin on November 09, 2014, 03:28:18 AM
looks like an all black K702 annies.
Fingers crossed for US$150  :)p1 :)p6

hello,

the GYTW says she'd even let me go to $200.  :)p1
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: wnmnkh on November 10, 2014, 07:13:53 AM
From looks, I think this is a variant of K712, the latest version of AKG K7XX series.

Oh wait, I can't use 'K7XX' anymore to describe the whole family.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: SoupRKnowva on November 10, 2014, 12:48:27 PM
the lack of bumps on the headband might be the single greatest "addition" to the 7XX
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Marvey on November 13, 2014, 01:53:03 AM
Right channel measurements added.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: PelPix on November 13, 2014, 02:53:25 AM
Right channel measurements added.

Holy ****. They almost identical!
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: LFF on November 13, 2014, 04:12:56 AM
INITIAL THOUGHTS...


I've been listening to the AKG 7XX.


As many of you might know, I have never been a fan of AKG. The longest I have ever listened to an AKG has been about 3 minutes and that was a heavily DSP'd K701 that supposed to be the second coming of jeebus or something like that. They have never been "right" and 3 minutes has been the longest. That is...until tonight.


Is it perfect? No, BUT this is the best sounding AKG I have ever put on my noggin. Full review to follow, but, I kid you not - the BEST AKG I have heard. Well done Massdrop, well done.  :)p1
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: takato14 on November 13, 2014, 05:45:12 AM
ok I STILL can't find these on massdrop

can I get a link or something
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Out Of Your Head on November 13, 2014, 07:00:27 AM
ok I STILL can't find these on massdrop

can I get a link or something
Patience... They are going to be available in a future Massdrop (hopefully). Right now they are not available anywhere.

Just like the Mousai DAC, Massdrop has been making gear available to some pirates for review before they are available on Massdrop. That way when they do start the Massdrop, they already have reviews to help people decide to buy it or not. It's a smart move. The first thing anyone wants to know when they see a new, never before seen product is "Are there any reviews?"

Or if the reviews are bad or there is a problem, then they can fix it or not do the Massdrop at all.

I am guessing this is their motivation for getting pirate reviews before selling on Massdrop.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: RexAeterna on November 13, 2014, 11:34:20 AM
INITIAL THOUGHTS...


I've been listening to the AKG 7XX.


 the BEST AKG I have heard.  :)p1

Blasphemy!
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Colgin on November 13, 2014, 05:12:17 PM
Is it perfect? No, BUT this is the best sounding AKG I have ever put on my noggin. Full review to follow, but, I kid you not - the BEST AKG I have heard. Well done Massdrop, well done.  :)p1

Well, AKG probably deserves a little credit as well.  ;)
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Will on November 13, 2014, 08:40:31 PM
Well, AKG probably deserves a little credit as well.  ;)


True that, great company to work with.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Colgin on November 13, 2014, 09:16:16 PM
True that, great company to work with.


Will, hopefully when this finally drops we will know (or you will be able to disclose to us) whether this is a re-branded Anniversary edition, K712 or some new iteration of this K/Q7xx series.series
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Marvey on November 13, 2014, 10:06:37 PM
ok I STILL can't find these on massdrop

can I get a link or something

They have not dropped yet. Maybe soon. Maybe we'll get some hints.

Yes, these are my favorite AKG cans. I plan on buying them myself. Also, it's important to note that we don't love every loaner from Massdrop. There have been duds. And I've written publicly about those.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: M3NTAL on November 13, 2014, 10:19:09 PM
Marv, Luis - have you both heard the K812?   I think very highly of the K1000 in the correct system - I don't know if you considered them when it was stated as best AKG.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: MuppetFace on November 13, 2014, 10:33:50 PM
FWIW I really like the K812, but I don't think Marv and LFF do.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: DrForBin on November 13, 2014, 10:38:43 PM
hello,

really hoping these will drop a bit closer to the Common December Holiday.

GYTW sez they may be under the bush for me if we have the  :money:
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Marvey on November 13, 2014, 10:52:22 PM
Marv, Luis - have you both heard the K812?   I think very highly of the K1000 in the correct system - I don't know if you considered them when it was stated as best AKG.

http://www.changstar.com/index.php/topic,1482.msg39070.html#msg39070 (http://www.changstar.com/index.php/topic,1482.msg39070.html#msg39070)

One of the two units from Tyll:http://www.innerfidelity.com/content/akg-k812-professional-reference-headphone

Didn't like them. Probably issues with consistency like K550.

K1000 non bass lite is good. I consider it a freak-show kind of thing. Still way way super overpriced at current asking. Even then, too bass lite. It needs 58 more drivers and compensation to get low bass because it is dipole. Also hard to say. Some were upper-mid forward. I guess those were the bass-lite version?

Now if AKG were able to recreate them - the non bass lite versions - and sell for $999. That would be good. But not a penny more.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: M3NTAL on November 13, 2014, 10:59:07 PM
I agree. K1000 needs an updating and a price drop.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Will on November 14, 2014, 01:24:22 AM
Will, hopefully when this finally drops we will know (or you will be able to disclose to us) whether this is a re-branded Anniversary edition, K712 or some new iteration of this K/Q7xx series.series


I'll be able to post more info like that as we get closer to launch.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Colgin on November 14, 2014, 01:46:25 AM
I'll be able to post more info like that as we get closer to launch.


I figured as much. Cool. Looking forward to launch.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: LFF on November 14, 2014, 05:13:13 AM
Marv, Luis - have you both heard the K812?   I think very highly of the K1000 in the correct system - I don't know if you considered them when it was stated as best AKG.

Didn't like them.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Marvey on November 19, 2014, 01:34:17 AM
Yeah, looks like this is some sort of K702 65th AE or K712 variant. I'd love to give them a shot if you or anyone else would be up to shipping them my way, though if they are like the K702 65th AE, I'll probably find the upper-mids and treble to be problematic for my tastes.

We will be sending the K7XX over to you, and on the CS loaner program after Ultrabike gets done with them.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Hands on November 19, 2014, 02:01:55 AM
Sounds good to me!
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Marvey on November 20, 2014, 06:41:46 AM
Filling a request. L and R channel overlay. Incredible.
(http://www.changstar.com/index.php?action=dlattach;topic=1902.0;attach=8058;image)
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: M3NTAL on November 20, 2014, 04:23:34 PM
@Will - Do you have a rough idea when these will 'drop' ?   I'm going to guess that it will be much closer to the day after Thanksgiving?   :-D
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Will on November 20, 2014, 05:39:26 PM
@Will - Do you have a rough idea when these will 'drop' ?   I'm going to guess that it will be much closer to the day after Thanksgiving?   :-D

We're looking at next week : )
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: raif on November 20, 2014, 07:19:41 PM
Well crud, there goes my "I don't participate in Black Friday" policy.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: donunus on November 21, 2014, 06:13:59 AM
By the way, these dont look way off from Ultrabikes k702 measurements. maybe akg has just changed all the k7 and q7 cans to sound very similar to each other
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Kamaka on November 22, 2014, 01:54:47 AM
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Ringingears on November 22, 2014, 03:51:48 AM
Wonder what the price will be? Any guesses.....?  :-Z
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: cizx on November 22, 2014, 09:19:58 PM
$250ish
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Will on November 23, 2014, 12:35:37 AM
$200 shipped in USA
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: spoony on November 23, 2014, 12:46:25 AM
Aww yeah... So, do these feature the infamous super wide soundstage of the earlier models?, I *may* be looking for a gaming pair :-DD
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: LFF on November 23, 2014, 02:00:29 AM
$200 shipped in USA

That's a great price.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Hands on November 23, 2014, 02:16:55 AM
Here's to hoping they're not identical to the K702 65th AE I owned for a bit. But, even then, $200 wouldn't be a bad deal at all from what I remember (I think I paid roughly that?). Even if not as technically competent in all regards, I still preferred the HD598 over the K702 AE. K702 just did some annoying things to my ears, but YMMV since I'm picky and weird. Really looking forward to hearing this particular K7XX iteration!
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: DrForBin on November 23, 2014, 03:07:34 AM
$200 shipped in USA
hello,

totally awesome, the GYTW sez pull the trigger! :money:
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Mproietti on November 23, 2014, 03:13:08 AM
Will it ship to Canada ?
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Will on November 23, 2014, 06:27:09 AM
Yup! Shipping to Canada for $225 I believe.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: elwappo99 on November 23, 2014, 06:28:54 AM
Here's to hoping they're not identical to the K702 65th AE I owned for a bit. But, even then, $200 wouldn't be a bad deal at all from what I remember (I think I paid roughly that?). Even if not as technically competent in all regards, I still preferred the HD598 over the K702 AE. K702 just did some annoying things to my ears, but YMMV since I'm picky and weird. Really looking forward to hearing this particular K7XX iteration!

It's somewhat hard to see any good pictures of the pads, so it's a little hard for me to speculate. I've got a pair of Q701, K702AE, and K712 here, and by the pictures I can get of them, they look like they might be a cosmetic change of the K712 purely based on the pads.

Do you remember what serial number of the K702AE you had?
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: kothganesh on November 23, 2014, 08:20:19 AM
Will, I trust its $225 to India as well?
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: altrunox on November 23, 2014, 01:07:51 PM
So, I read on Massdrop that the first drop will be limited to 2k units, and 6k will be produced...
So if I keep saving money I may get them on another drop next year?! Am I right?!  :)p1 :)p6
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: cizx on November 23, 2014, 05:08:33 PM
If I don't like the ones I get ill sell them to you.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Anathallo on November 24, 2014, 02:02:51 PM
It's up - 13 gone already as of this post.

https://www.massdrop.com/buy/akg-k7xx-massdrop-first-edition-headphones
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Mproietti on November 24, 2014, 02:11:18 PM
Secured mine !!  :)p7
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: fishski13 on November 24, 2014, 02:13:04 PM
fish on.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: donunus on November 24, 2014, 02:42:00 PM
These cans are BEEAAAUUUTIIFFUUULLL!
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Cajunky on November 24, 2014, 03:00:37 PM
I was #16 on Massdrop.  I am very excited for these headphones. I love the look.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: kothganesh on November 24, 2014, 03:03:05 PM
I'm in. My first AKG ever. And $15 shipping to India. Wow !
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: No_One411 on November 24, 2014, 05:33:25 PM
Jumped in on the drop as well.

Don't think you can go wrong for $200 shipped + taxes.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: CEE TEE on November 24, 2014, 05:41:44 PM
I'm #181.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Marvey on November 24, 2014, 05:48:33 PM
Ah, fuck you guys. I guess I'm in on it too.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: zerodeefex on November 24, 2014, 06:38:03 PM
You assholes. I'm in.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: insidious meme on November 24, 2014, 07:05:04 PM
Maybe this makes the pirates booty thread  :)p7
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: bozebuttons on November 24, 2014, 09:02:20 PM
I am in as well, Like I need another Headphone.
I have a k701 I bought new in the box with 10 hours on it.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Out Of Your Head on November 24, 2014, 09:22:16 PM
Yes, you all suck! I have way too many headphones, but bought a pair anyway. Never owned any AKG's.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: lmswjm on November 24, 2014, 10:29:11 PM
Have one on me :money:
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Colgin on November 24, 2014, 10:59:07 PM
I am in as well.  And I already have a Q701. Hoping this is a significant improvement over the Q701. Otherwise I could have spent the money on an HD 600 (which I might get anyway). I figure if they do nothing but smooth the treble and ever-so-slightly boost the bass over the Q701 I will be a happy camper and it will have been a worthwhile upgrade.  Too bad my Q701 has so little re-sale value. May just give it to my brother as a gift after some comparos between the two.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: raif on November 24, 2014, 11:07:16 PM
...Hoping this is a significant improvement over the Q701...

Don't forget the removal of the headband bumps, that alone is worth the price of admission.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Kotomirage on November 25, 2014, 01:08:07 AM
Is there a point getting these if I already have a pair of HE-500s?

Edit: I want them because they're pretty cheap and they sound like they'd be more comfortable than the HE-500s. Better soundstage too?

Edit2: Damn you guys, I bought them anyway  >:(
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Marvey on November 25, 2014, 01:15:33 AM
A little bit better stage. Significantly more comfort. Different sound. Snappier. More articulate. Definitely more open and airy. Not as overall laid back as HE-500, although the HE-500 can have a bit of tizz depending upon upstream gear.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: antifocus on November 25, 2014, 02:20:24 AM
I set alarm this morning and waited in front of the computer 5 min before the drop and I am in No.7. I don't know why I am doing this, it is not like getting in front can get me anything...Being stupid again I guess.
I had K701s for a year long time ago, never really liked it, hope KXX is totally a different headphone.
But it is a cool name.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Armaegis on November 25, 2014, 06:03:51 AM
For those who've already heard it, what amps (or kind of amps) do you recommend for it?

I'm just trying to talk myself out of this one...
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Ringingears on November 25, 2014, 06:14:47 AM
Just pulled out my K701's I bought when Stereophile made them popular. Compared my HD 650's and for fun a lightly modded pair of T50RP's. The 701's came in last. IMHO.

Still felt the K701 had low mid/upper bass issues, and the "sterile" sound.

Marv and anyone who has heard both the K701 and the K7XX. How do they compare, or are they very different?
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: LFF on November 25, 2014, 06:17:28 AM
Just pulled out my K701's I bought when Stereophile made them popular. Compared my HD 650's and for fun a lightly modded pair of T50RP's. The 701's came in last. IMHO.

Still felt the K701 had low mid/upper bass issues, and the "sterile" sound.

Marv and anyone who has heard both the K701 and the K7XX. How do they compare, or are they very different?

I hate and have always hated the K701. I actually liked the K7xx.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: DrForBin on November 25, 2014, 07:14:45 AM
hello,

pulled the trigger!

(at least i was in the first 1,000. first day and near half-way through the limit on the drop! wow!)
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Ringingears on November 25, 2014, 07:21:09 AM
LFF-Great to hear. Now how to  explain to my wife about buying a pair of HD 800's on Thursday, and now I need another pair of cans on Monday, because you know, they are on sale. Works for her with clothes, but never for me with audio gear.  :(  I thought I liked the K701's at first because "they" said I would. After a couple of months I realized they weren't for me. Hence the HD 650's. My best friend loves the K701. Each to their own.

That's the way the world works. Looking forward to impressions of the 7XX. Love the name.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: CEE TEE on November 25, 2014, 07:28:30 AM
"It's not what you spend...it's what you save!"

Say that you are doing a "vs. battle" and the phones that win after a prolonged comparison will stay.

(Then the other 19 pairs will eventually have to go!  :& )
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Ringingears on November 25, 2014, 07:39:07 AM
That might work, If I can justify the multiple speakers, amps, DAC's and CD players. I have to learn how to sell things! Zero sum game would work. Um, how DO I sell this stuff?
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: FraGGleR on November 25, 2014, 11:10:17 PM
Looks like I can still get in on these.  Quick question.  If I miss the airiness and soundstage of my recently sold HD800s (currently using an HD650 off of a Bottlehead S.E.X. 2.1), would these be a better step in that direction than something like the Sony MA900s?  Max budget is $200 for something just a tad more expansive sounding for orchestral work than the HD650s.  Don't want anything too thin sounding.  Thanks.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: cizx on November 26, 2014, 05:31:45 AM
I think the consensus right now is that this is the best $200 you can spend on phones.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Claritas on November 26, 2014, 05:56:12 AM
I think the consensus right now is that this is the best $200 you can spend on phones.

This is getting massively overhyped (pun unavoidable).
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: cizx on November 26, 2014, 06:12:42 AM
that's why I didn't drop any money on it...
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: donunus on November 26, 2014, 11:45:32 AM
By the way, I hear these are pretty much exactly like the K702 Anniversary edition in sound quality. I also hear that the only difference between the anniversary and the q701 are the pads and that the warmer sound on the anniversaries are attributed to the thinner/denser memory foam pads.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: THX on November 27, 2014, 01:49:55 AM
MDR MA900  vs  K7xx Massdrop

FIGHT!

At the current street&internet prices (around 200 bux), which one would you rather get?
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: M3NTAL on November 27, 2014, 02:04:20 AM
I will be doing a MA900 vs K7XX battle at my work when the drop ships. I'm going to ASSume the K7XX is going to be an all around victor, but the MA900 is special enough to keep in my stable. If the bottom end didn't roll off and had a little less distortion in total - it would be awesome!
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: THX on November 27, 2014, 02:11:46 AM
I will be doing a MA900 vs K7XX battle at my work when the drop ships. I'm going to ASSume the K7XX is going to be an all around victor, but the MA900 is special enough to keep in my stable. If the bottom end didn't roll off and had a little less distortion in total - it would be awesome!

ma900 has lower overall and less erratic distortion

k7xx
(http://www.changstar.com/index.php?action=dlattach;topic=1902.0;attach=7926;image)
ma900
(http://www.changstar.com/index.php?action=dlattach;topic=1725.0;attach=7419;image)
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Hands on November 27, 2014, 03:12:22 AM
By the way, I hear these are pretty much exactly like the K702 Anniversary edition in sound quality.


Where did you get that info? Not that I'd doubt it, but I suppose that would mean a no purchase on my end (which is fine, the 65th AE was still good, just not for me). I still just need to hear the 7XX. Plus, I wanna add it to my list of measured headphones.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Colgin on November 27, 2014, 03:41:54 AM

Where did you get that info? Not that I'd doubt it, but I suppose that would mean a no purchase on my end (which is fine, the 65th AE was still good, just not for me). I still just need to hear the 7XX. Plus, I wanna add it to my list of measured headphones.

Clearly only really AKG/Massdrop know for 100% certain. However, I have read the HF thread pretty carefully and filterered the comments of those who we very familiar with the AKG 7-- line and based on those posts, the pics and Massdrop's product description it really does seem 99.9% likely that these are AKG K702 65th Anniversary cans that have been reprinted/rebranded per Massdrop.  There could be even more precise driver matching in these, but the driver matching in the original run of "Annies" is supposedly very good to begin with. More likely these a reprinted Annie's a a very, very good price.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: M3NTAL on November 27, 2014, 03:47:31 AM
ma900 has lower overall and less erratic distortion

Yes in certain areas the K7 looks a little more wild, but the low end is mostly the issue with the MA900.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: spoony on November 27, 2014, 06:43:13 PM
Not that I'd doubt it, but I suppose that would mean a no purchase on my end (which is fine, the 65th AE was still good, just not for me).
Hey, what exactly did you not like about the annies?
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Hands on November 27, 2014, 07:31:47 PM
I heard some emphasis around 2KHz and overall found the treble not quite to my tastes, but in ways that are hard to explain. Plus it didn't do well at high volume.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: spoony on November 27, 2014, 07:41:25 PM
I see, do you remember any specifics on imaging / soundstage width?... I'm planning to use these for gaming.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Marvey on November 28, 2014, 12:18:03 AM
Imaging pretty darn good with sense of depth. I'm really not the one to ask about these things, but better than LCD2, PM-1/2, etc. Bit better than HD600. Not quite as good as HD800.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: BlackenedPlague on November 28, 2014, 12:51:49 AM
god fucking dammit, everywhere I see people saying this is the best version of AKG 700 series.

 facepalm I will buy it, but would have gladly paid like $50 more if it was made in Austria
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: spoony on November 28, 2014, 12:56:15 AM
Imaging pretty darn good with sense of depth. I'm really not the one to ask about these things, but better than LCD2, PM-1/2, etc. Bit better than HD600. Not quite as good as HD800.
That's very encouraging. Thanks!
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: bobusn on November 29, 2014, 03:32:30 AM
It's up - 13 gone already as of this post.

https://www.massdrop.com/buy/akg-k7xx-massdrop-first-edition-headphones

And now at 2323...

r/Bob
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: BlackenedPlague on November 30, 2014, 01:13:05 AM
Gonna have to get a used one or wait for another batch........... shiiiiiiiiiiiiiiettt  poo
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: RexAeterna on November 30, 2014, 12:59:01 PM
I heard some emphasis around 2KHz and overall found the treble not quite to my tastes, but in ways that are hard to explain. Plus it didn't do well at high volume.

I felt the same way. Now if the k601 never suffered from distortion issues like the rest of the k series then that would of been such a perfect headphone cause their FR sounded very well balanced/flat compared to the k701/702/q701. I still consider the 601's best out of the k series.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: THX on December 01, 2014, 12:06:12 AM
I felt the same way. Now if the k601 never suffered from distortion issues like the rest of the k series then that would of been such a perfect headphone cause their FR sounded very well balanced/flat compared to the k701/702/q701. I still consider the 601's best out of the k series.

Now the tricky part is find 601's and 612's the are NOT made in China.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: spoony on December 04, 2014, 10:05:01 PM
Was wondering, what's a good amp for these?
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: anetode on December 05, 2014, 09:53:37 PM
I felt the same way. Now if the k601 never suffered from distortion issues like the rest of the k series then that would of been such a perfect headphone cause their FR sounded very well balanced/flat compared to the k701/702/q701. I still consider the 601's best out of the k series.


 :)p5

Was wondering, what's a good amp for these?

Whatever you have lying around. Rumors of the K7 series being hard to drive are greatly exaggerated.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: MuppetFace on December 05, 2014, 10:20:54 PM
Whatever you have lying around. Rumors of the K7 series being hard to drive are greatly exaggerated.

From memory the original K701 was harder to drive than the subsequent Q701 revisions onward.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Marvey on December 05, 2014, 10:24:30 PM
:)p5

Whatever you have lying around. Rumors of the K7 series being hard to drive are greatly exaggerated.

LOL, HD600/H650 were "hard to drive" back in the day. I blame HFM.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Claritas on December 06, 2014, 12:43:37 AM
Rumors of the K7 series being hard to drive are greatly exaggerated.

It was how people avoided coming to terms with their dislike for the sound.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: zerodeefex on December 06, 2014, 01:02:05 AM
Oh god. This must have been years ago. I remember the K701 was the HD6XX killer and I got one. I remember freaking out about having to get a better amp and picking up a Heed Canamp. That was one of the first indications for me that most audio recommendations on the internet were complete donkey poop.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Marvey on December 06, 2014, 01:16:55 AM
You obviously didn't burn it in for 550 hours.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: spoony on December 06, 2014, 01:32:44 AM
Marv, can you hear the 3 KHz dip with test tracks?
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Claritas on December 06, 2014, 01:47:17 AM
You obviously didn't burn it in for 550 hours.

You're right: only 505.  facepalm
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Marvey on December 06, 2014, 01:48:36 AM
Marv, can you hear the 3 KHz dip with test tracks?

I didn't notice. Possible artifact / null related to inner diameter of pads.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: donunus on December 06, 2014, 03:11:53 PM
By the way, related to the old K701 talk, the Q701s aren't all that bad. Much better than my old bright k701s that had a swishy echoey(ringing) sound. I am driving them with the Vali and the sound is quite nice as long as they are not turned up too loud making them distort. I'm not sure though if the distorting is because of the cans going past their limits or the vali not having enough juice causing the distortion.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: ultrabike on December 07, 2014, 09:21:58 AM
Just got to hear these today. Pretty awesome so far. Good impact and openness. Works well with live music. Will listen some more before doing some measures... Special thanks to the Massdrop guys!
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Mullet on December 07, 2014, 11:42:27 AM
I jumped on the drop and was initially somewhere in the 2200s... a few days later I fell below 2k. Guess a bunch of peeps bailed. I'm pretty excited for these. I had K701s years ago and never really took to them. I liked the sound stage, but couldn't get over the anemic bass and overall plastic-y sound. It sounds like these are *fixed* K701s of sort. Hey for 200 bones you can't go wrong.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: ultrabike on December 08, 2014, 06:41:16 AM
I like them a lot. I feel this have cleaner bass than the HD6x0. I also heard some things clearer with these than with the HD600s, particularly female voices. The response is different for sure. A different presentation. It does not assault my senses at all. Very enjoyable and very engaging.

As far as looks, I think this is the best looking AKG can yet. Cuz I like black. Very comfortable as well, and the price is more than right.

K... Here are some measures.

Frequency Response

(http://www.changstar.com/index.php?action=dlattach;topic=1902.0;attach=8177;image)

Distortion Right

(http://www.changstar.com/index.php?action=dlattach;topic=1902.0;attach=8179;image)

Distortion Left

(http://www.changstar.com/index.php?action=dlattach;topic=1902.0;attach=8181;image)

CSD Right

(http://www.changstar.com/index.php?action=dlattach;topic=1902.0;attach=8183;image)

CSD Left

(http://www.changstar.com/index.php?action=dlattach;topic=1902.0;attach=8185;image)

Impedance

(http://www.changstar.com/index.php?action=dlattach;topic=1902.0;attach=8187;image)
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: donunus on December 08, 2014, 02:12:56 PM
What amp are you using with these Ultrabike? I have some Q701s here and they distort at a volume too low for my liking with the Vali. I was confused whether this was a maximum power issue for this series of cans with their 200mW max rating or if its just a case of just needing more power period.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: ultrabike on December 08, 2014, 03:54:52 PM
Just the Focusrite 2i2. I can try later in the week with more power.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Marvey on December 08, 2014, 05:18:31 PM
What amp are you using with these Ultrabike? I have some Q701s here and they distort at a volume too low for my liking with the Vali. I was confused whether this was a maximum power issue for this series of cans with their 200mW max rating or if its just a case of just needing more power period.

Could be output Z of Vali at low frequencies?
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: shipsupt on December 08, 2014, 05:46:17 PM
I seemed to recall folks saying these AKG's needed a "good" amp. I always figured they benefited from something that could swing a little voltage.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: ultrabike on December 08, 2014, 05:50:59 PM
It's not an efficient can for sure.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Marvey on December 08, 2014, 06:17:12 PM
I had no issues with the K7XX with the Vali though; but I didn't crank it.

Glad you took the measurements. It seems the dip is not as much with more open baffle measurement - as I suspected.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: ultrabike on December 08, 2014, 07:04:50 PM
It's all relative. I still had about 10 dB of margin on my 2i2 so possible to blast 100 dB SPL from the 7XXs. Vali can put out more voltage than the 2i2 so best guess is that it can power these with ease.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Armaegis on December 08, 2014, 07:52:50 PM
Whatever you have lying around. Rumors of the K7 series being hard to drive are greatly exaggerated.
It was how people avoided coming to terms with their dislike for the sound.
LOL, HD600/H650 were "hard to drive" back in the day. I blame HFM.

I always figured it was people going from the Senns to the K7__ (probably off a receiver or other amp with high output Z, which would exaggerate the midbass hump on the Senn) and then trying to come to terms with the sudden loss of bass. So of course "burn in" or needing a new amp becomes the default explanation. Of course, after 100's (or 1000's!) of hours those pads will soften too, which usually skews the sound to the slightly warmer side.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: spoony on December 09, 2014, 12:57:52 AM
Cool! Why are the distortion figures so different from Marv's?
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Marvey on December 09, 2014, 01:41:07 AM
I'm pushing mine probably 10db or more louder.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: ultrabike on December 09, 2014, 02:42:35 AM
Possible. Different calibration, different setup. Notice however that both in Marv's and my distortion measurements there are distortion peaks around 2 kHz for the right driver, and around 1 kHz for the left. Different baffles might also create different distortion results (specially absolute) perhaps due to different frequency response.

Perhaps if the tools allowed for % THD plots things might be closer.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: donunus on December 09, 2014, 03:48:50 AM
Anyway I will try with more amps and see if they distort at around the same loudness. If so, then I guess its more about the cans nbot being able to tolerate my abuse of volume vs needing more power hehehe
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Armaegis on December 09, 2014, 06:15:49 AM
Notice however that both in Marv's and my distortion measurements there are distortion peaks around 2 kHz for the right driver, and around 1 kHz for the left.

Could it be due to the cable entry and how it affects the housing? (shot in the dark here)
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: ultrabike on December 09, 2014, 03:58:34 PM
TBH I dunno. But on the positive side I did not feel this can had obvious distortion issues.

There was one case where the cable entry slightly affected sound, but it was more on the frequency response.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: fishski13 on December 17, 2014, 03:19:30 AM
#11 on the drop and shipped today with scheduled delivery this Fri. headbang
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: CEE TEE on December 17, 2014, 10:58:57 AM
^Oh nice!  #161 here and need to check junk folder on host server to see if I may have a notice too...
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: insidious meme on December 17, 2014, 12:19:23 PM
You can check the "My Transactions" page on Massdrop to see if your thing got shipped. Mine says it has, but with a Monday delivery.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: azncookiecutter on December 17, 2014, 03:18:01 PM
#52, not shipped yet. Probably won't be getting till after Christmas, as it's coming up to Canada.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Anathallo on December 17, 2014, 03:31:36 PM
#52, not shipped yet. Probably won't be getting till after Christmas, as it's coming up to Canada.

My #10 just shipped out yesterday, coming to Canada as well.  Will let you know how long it takes.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Mproietti on December 17, 2014, 04:34:55 PM
I am number 25, shipped to Canada as well ... will keep you guys posted

Cheers
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Colgin on December 17, 2014, 04:54:04 PM
I am number 120 or thereabouts, but have not received any indication of shipping yet.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: bozebuttons on December 17, 2014, 07:03:47 PM
^Oh nice!  #161 here and need to check junk folder on host server to see if I may have a notice too...
Better check your # as I also have order #161,There has been a delay in shipping to the NJ fulfillment center just got a email
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: mkubota1 on December 17, 2014, 07:07:49 PM
Apologies if it was already mentioned, but what is the significance of <SN#300?
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Colgin on December 17, 2014, 07:42:07 PM
Better check your # as I also have order #161,There has been a delay in shipping to the NJ fulfillment center just got a email

Yea, I got that message also. I am not really in any rush to get these but hopefully people who need them as holiday gifts (to self most likely) will get them in time.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Greed on December 17, 2014, 08:44:28 PM
Apologies if it was already mentioned, but what is the significance of <SN#300?

If I remember correctly "matched" drivers.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: shipsupt on December 17, 2014, 08:58:20 PM
I made that shit up about matched drivers being limited.  They all should be "pre-selected" as far as I know.

But this is from the release notes: Note: The first 250 purchasers are guaranteed a serial number under 300.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: M3NTAL on December 17, 2014, 09:09:30 PM
It is just something nice that Mass Drop is doing for loyal customers who took the early leap of faith on the drop. I think it is pretty cool of them for a 'limited' run product.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: azncookiecutter on December 17, 2014, 09:40:43 PM
Annnnnnd might have jumped the gun. Shipping notification came an hour ago.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: mkubota1 on December 17, 2014, 10:43:55 PM
I made that shit up about matched drivers being limited.  They all should be "pre-selected" as far as I know.

But this is from the release notes: Note: The first 250 purchasers are guaranteed a serial number under 300.

It is just something nice that Mass Drop is doing for loyal customers who took the early leap of faith on the drop. I think it is pretty cool of them for a 'limited' run product.

Haha... I figured that.  So I guess it's mostly about bragging rights which is totally cool.  Shall we start the "SN <300 bass-heavy" rumor thread now?   :P


Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: M3NTAL on December 17, 2014, 11:00:21 PM
Sounds like a plan!
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: kothganesh on December 18, 2014, 04:52:55 AM
#58 on the list..on its way to the subcontinent. Let's talk in 2015 about this HP :(
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: robakri on December 18, 2014, 10:19:30 AM
Got one snailing its way to Iceland, hoping it arrives in 2015 due to new import rules that will make the fees cheaper :)
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: bozebuttons on December 18, 2014, 03:08:02 PM
Mine was shipped on the 17th.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Colgin on December 18, 2014, 03:52:15 PM
Someone reported on Head-Fi that these have same exact ear pads as the Q701 (this person owns both cans) but did have a little more bass, so that person's speculation is that AKG effectively did their own bass-port mod on the Q701.  This is speculation and not confirmed in any way. I was expecting the K702 anniversary pads at least since this was supposed to be based off of the K702 and not the earlier Q701 iteration. Frankly, if these are the same pads and are very close to the Q701, with perhaps just a touch more bass, I may be selling these quickly (possibly unopened). Will wait for some more reports.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: robakri on December 18, 2014, 04:12:08 PM
Someone reported on Head-Fi that these have same exact ear pads as the Q701 (this person owns both cans) but did have a little more bass, so that person's speculation is that AKG effectively did their own bass-port mod on the Q701.  This is speculation and not confirmed in any way. I was expecting the K702 anniversary pads at least since this was supposed to be based off of the K702 and not the earlier Q701 iteration. Frankly, if these are the same pads and are very close to the Q701, with perhaps just a touch more bass, I may be selling these quickly (possibly unopened). Will wait for some more reports.

Are the Q701 pads memory foam?
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Colgin on December 18, 2014, 04:13:53 PM
Are the Q701 pads memory foam?

No, they are not. So, if the K7xx are, in fact, memory foam then they are different. My understanding is that this pad difference accounted for much if not all of the sound improvements/differences.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: robakri on December 18, 2014, 04:17:25 PM
No, they are not. So, if the K7xx are, in fact, memory foam then they are different. My understanding is that this pad difference accounted for much if not all of the sound improvements/differences.

The massdrop product description states memory foam, I'll go with that rather than some head-fi members, there is too much bogus information floating around that site.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Mproietti on December 18, 2014, 04:19:44 PM
Robakri, I agree. Unless it is confirmed that the HF member as truly the 7XX in hand I will consider it bogus.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Colgin on December 18, 2014, 04:22:45 PM
The massdrop product description states memory foam, I'll go with that rather than some head-fi members, there is too much bogus information floating around that site.

Yes, I just checked the description on Massdrop myself and they expressly say "memory foam" and I trust they have described their own co-branded product correctly. It could be that the recipient could not tell the difference based on looks since they are both velour covered.

Edit: OP at Head-Fi does have the AKG K7xx (as clearly posted in pics), but in response to my post there checked and says that indeed the K7xx has the memory foam pads. He had been just visually comparing and they look quite similar if not identical, but when you squeeze them you can tell the difference. Apologies for sowing any confusion here.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: fishski13 on December 18, 2014, 04:45:25 PM
wow...he waited all of 30mins from the time of delivery before posting impressions.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: robakri on December 18, 2014, 04:50:17 PM
wow...he waited all of 30mins from the time of delivery before posting impressions.

haha

I think reading impressions in the next few days won't be worth much. At least I need some time with a headphone to finally judge it. The excitement and smell of a new product can be deceiving, even for ears. Also for some, a different signature is often perceived good (until he adjusts) and by others bad, while having little to do with actual performance.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Colgin on December 18, 2014, 05:22:12 PM
haha

I think reading impressions in the next few days won't be worth much. At least I need some time with a headphone to finally judge it. The excitement and smell of a new product can be deceiving, even for ears. Also for some, a different signature is often perceived good (until he adjusts) and by others bad, while having little to do with actual performance.

All good points.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: shipsupt on December 18, 2014, 05:45:45 PM
wow...he waited all of 30mins from the time of delivery before posting impressions.

 :)p13 Gotta be first, right?

Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Will on December 18, 2014, 05:55:14 PM
Robakri, I agree. Unless it is confirmed that the HF member as truly the 7XX in hand I will consider it bogus.

Can confirm, the pads are memory foam, not the same as the Q701.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: fishski13 on December 18, 2014, 07:26:44 PM
can you confirm that these are the greatest headphones evhar, peeing on everything else from a high cliff? how do you think they will sound from my iPod? if these suck balls, should i blame GW Bush or whine to Schiit about it? if i didn't get S/N 69 as i prayed for, i will be really pissed at MD.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Will on December 18, 2014, 08:20:24 PM
can you confirm that these are the greatest headphones evhar, peeing on everything else from a high cliff? how do you think they will sound from my iPod? if these suck balls, should i blame GW Bush or whine to Schiit about it? if i didn't get S/N 69 as i prayed for, i will be really pissed at MD.

My hero.

But really, the rumors and speculation floating around about these... It's pretty impressive given we make everything pretty clear in the product description.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Anaxilus on December 18, 2014, 08:32:14 PM
It's pretty impressive given we make everything pretty clear in the product description.

The internet has never been conducive to reading comprehension.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: DrForBin on December 18, 2014, 09:53:53 PM
The internet has never been conducive to reading comprehension.

hello,

+65535
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Solderdude on December 19, 2014, 05:53:50 AM
can you confirm that these are the greatest headphones evhar

maybe the greatest AKG evhar ....
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: donunus on December 20, 2014, 05:40:08 AM
By the way, my new Q701s distortion have magically disappeared. Damn burn in :D
Anyway, I think these new Qs may actually be identical to the K7xx except for the pads because first of all, they sound NOTHING like my old K701s and are pretty much my ideal sound. On a side by side comparison with HD600s out of the Vali, these have a similar amount of bass as the senns but with better control. The highs however are much nicer. Smooth yet extended and the soundstage is better than the hd600 as well. The senns sound congested, grainy, and dare I say it shouty in comparison similar to what I have read from purrin's comparison against the senns. All this plus ultrabike's Q701 measurements are leading me to think that these may just be the same cans as the k7xxx except for the pads. I wish someone that receives theirs can do a comparison with a later version chinese Q701.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: bozebuttons on December 20, 2014, 02:59:42 PM
#261 in the house, My order # was 161 so I guess they are not matching serial #s to order #s.
 I have yet to listen to them yet.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: fishski13 on December 20, 2014, 05:58:23 PM
#171 arrived last eve. Haven't had the chance to do much critical listening, but these are very different from the K701. Soundstage is more upfront with less air. A big, warm smoothie with much more bass. Mids to treble are really swell. Dynamics seem fine thus far.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: M3NTAL on December 22, 2014, 08:18:11 PM
I unfortunately did not receive #69 either!  I was #6 on the drop and received #277.  I'm just glad they don't sound like my K701.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: fishski13 on December 23, 2014, 03:44:11 AM
I unfortunately did not receive #69 either!  I was #6 on the drop and received #277.  I'm just glad they don't sound like my K701.

try the K701 pads on the K7xx. switching back and forth i prefer the sonics of the K701 pads over the memory foam. the memory foam is a little too bassy, warm and smoothed over. with the K701 pads, it sounds like a fleshed out K701 with more bass and reduced treble penetration.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: M3NTAL on December 23, 2014, 03:58:56 AM
That would be interesting - except the K701 is long gone from my stable.  I should have said "like my K701 did""    I'm still caught up thinking about all the possibilities of you and I sharing 69.     YARRRRRR
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: fishski13 on December 23, 2014, 01:43:57 PM
i can't complain. i love this HP with the K701 pads. pure goldilocks.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: shipsupt on December 23, 2014, 02:17:03 PM
I'm shocked!  My 7XXX made it to me today, in the UK!!  Well done AKG and Massdrop.


Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Colgin on December 23, 2014, 02:41:01 PM
By the way, my new Q701s distortion have magically disappeared. Damn burn in :D
Anyway, I think these new Qs may actually be identical to the K7xx except for the pads because first of all, they sound NOTHING like my old K701s and are pretty much my ideal sound. On a side by side comparison with HD600s out of the Vali, these have a similar amount of bass as the senns but with better control. The highs however are much nicer. Smooth yet extended and the soundstage is better than the hd600 as well. The senns sound congested, grainy, and dare I say it shouty in comparison similar to what I have read from purrin's comparison against the senns. All this plus ultrabike's Q701 measurements are leading me to think that these may just be the same cans as the k7xxx except for the pads. I wish someone that receives theirs can do a comparison with a later version chinese Q701.

Sorry, my Q701s are the earlier Made in Austria version. But people think to think the AKG 701 65 Annie/AKG K7xx are the same as Q701 but for pads. I have not tried switching to test this out but I would not be surprised if that is the case.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: fishski13 on December 23, 2014, 03:05:43 PM
I'm shocked!  My 7XXX made it to me today, in the UK!!  Well done AKG and Massdrop.




yes, and huge props to Will & Co for putting up with all the whiny petulance over at the MD K7xx thread. they're headphones, not pacemakers
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: insidious meme on December 23, 2014, 04:28:27 PM
No. 65 here. No issues with rattling. Did a YouTube video of some bass sounds a little above listening level.  Have to put it through its paces more later. Did notice some upper mids prevalence.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: antifocus on December 23, 2014, 10:42:28 PM
Been burning-in the K7XX for 90 hours, I still don't quite like it. After owning the HD800 for a long time the K7XX is simply not transparent enough for me.
Well intended to give them to my dad anyway...
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: antifocus on December 23, 2014, 10:43:45 PM
My No.98 also no rattling.
The build quality is worse than my long gone MIA K701 though.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: AZ on December 24, 2014, 02:07:46 AM
   First about rattling issue: had this problem with my old K701. All I had to do was disassemble the left driver like so:     http://youtu.be/20VRAznJzgw  and wrap all the wires into something soft but transparent like stretched synthetic cotton ball.
    Received mine this morning. I see no difference in build quality vs K701 but leather headband is more comfortable and black color means no fading issues (my K701 has yellow spots on one side, weird as they spent all their time in a closed cabinet, never under sunlight and pretty much never worn, maybe 10 hours of real listening time).
   Compared with HD-650 and K701 all stock. First impression K7XX is better but this feeling pretty much all disappeared after thorough evaluation and comparisons. Took no measurements yet, just listening.
   Starting from the bottom: K7XX is better then both others not by much and definitely isn't great but better, more extended, fuller and articulate. The other two are both so so just differently.
   For midrange I found what seems to be a pretty good analogy, imagine three girls ;-). One is meaty, proportional but a bit fat, the other is very lean but still fairly proportional (not your 90/60/90 ideal and not some boy-model like 75/45/65, but probably something like 80/55/80). The third one is like a silicone infused barbie doll; big boobs, super thin waist and super tight meaty ass. Imagined ;) ok, the first one is HD-650, the second is K701 and the third is K7XX. Those familiar with the first two sets should understand the analogy while third one is more difficult to explain. At first it seems to be all good but then you realize some parts of the midrange are presented properly but something right next to those ranges would just be missing and make the rest stand out a bit too tall. It's like looking at a pretty face going down to a nice breasts and then what the hell is wrong with her waist, does she even eat? Then tight ass she wouldn't let you touch or hold and then a pair of pretty legs. Dealing with that kind of sound in the long run would probably be unpleasant but that may just be me and others could probably feel different about both girls and cans  :)p8.
   Upper end is taken by K7XX again, the other two are so so but in a different way. HD600 is a bit too mellow while K701 is too juicy. K7XX seems to be right in the middle and right where it needs to be in the treble department.
   Overall all three have their issues but I would probably go with either the fat or the lean one, simply because smaller problems of the barbie girl just seem a bit more glaring on the overall pretty picture and therefore to me just feel more disturbing (like an eye sore or a small imperfection that only becomes visible when your glasses are perfectly clean). Take that back, I don't really listen to neither ;-).
   To me Philips Fidelio X2 is a better set, has it's issues mentioned in my review somewhere but sound-wise it sits right in between HD600 and K701, suppose something K7XX wanted to be but...... . Using the same analogy X2 is like a good looking young girl who you can imagine to look just perfect in about 5 years or so if not damaged by silicone, cellulite, crazy diets or fat and/or just too much attention from men. My opinion on both counts could have been different if I was in my 20th  8).
   Value proposition; I personally think K7XX price on massdrop was just about right and probably was not such a crazy great deal. Considering X2 is $300 and HD650 is frequently $250 I would see the fair price could to be around $250 with immediate free delivery from say amazon prime. Massdrop is a different story so $200 for the first product with uncertain delivery time was a good decision on their part.
   I can see many folks would enjoy this set quite a bit, just wish more people had more opportunities to better familiarize themselves with unamplified life music so we could all have more of the natural sounding sets.
   Edit: Now since some got so touched by the analogy with female beauty have to add: also wish there was more attention to a healthy foods and lifestyles and less for all kinds of silicone shops or other means of artificial body enhancements that never last. Maybe then we would have less of those who get offended by such comparisons and get overall happier society.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Boner Stabone on December 24, 2014, 04:00:54 AM
You speak in strange comparisons. Are you a homosexxual?
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: AZ on December 24, 2014, 04:20:57 AM
No, I'm just strange  :P Why are you asking ;)
   Seriously though, I find it easier to understand and  explain sound qualities while using different analogies.
   For example I would often describe poor digital implementation as a forest of trees with no leafs. Today when discussing the sound of these sets with colleagues  this analogy with girls somehow felt like the best option.
   Have to admit though, it really sounds strangely unusual or unusually strange :-0
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: anetode on December 24, 2014, 05:15:00 AM
   For midrange I found what seems to be a pretty good analogy, imagine three girls ;-). One is meaty, proportional but a bit fat, the other is very lean but still fairly proportional (not your 90/60/90 ideal and not some boy-model like 75/45/65, but probably something like 80/55/80). The third one is like a silicone infused barbie doll; big boobs, super thin waist and super tight meaty ass. Imagined ;) ok, the first one is HD-650, the second is K701 and the third is K7XX. Those familiar with the first two sets should understand the analogy while third one is more difficult to explain. At first it seems to be all good but then you realize some parts of the midrange are presented properly but something right next to those ranges would just be missing and make the rest stand out a bit too tall. It's like looking at a pretty face going down to a nice breasts and then what the hell is wrong with her waist, does she even eat? Then tight ass you want to slap and not touch or hold and then a pair of pretty legs. Dealing with that kind of girl in the long run would probably be unpleasant but that may just be me and others could probably feel different about both girls and cans  :)p8.
   

Sometimes it's not enough to talk about just their measurements to get the girl analogy right. Going by metric measurements alone is a little Russian, y'know? You have to say something like, that headphone sounds like one of those black girls with a generous bottom that require a lot of damping lest they get all shrieky. Or flat like those asian girls who look like ten year old boys. I've even heard ladyboys being invoked for some especially egregious headphones. What I'm saying is that we have to diversify our objectification of women to include other factors, like race and religion. Who wouldn't want to own the headphone equivalent of a naughty Catholic schoolgirl brimming with newfound post-pubescent voluptuousness? Or maybe something with a veil over most of the bandwidth, like a muslim girl - still got those ankles and the enticing eyes.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Marvey on December 24, 2014, 05:29:59 AM
I like white girls with big butts. Married one.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: AZ on December 24, 2014, 05:46:29 AM

Sometimes it's not enough to talk about just their measurements to get the girl analogy right. Going by metric measurements alone is a little Russian, y'know? You have to say something like, that headphone sounds like one of those black girls with a generous bottom that require a lot of damping lest they get all shrieky. Or flat like those asian girls who look like ten year old boys. I've even heard ladyboys being invoked for some especially egregious headphones. What I'm saying is that we have to diversify our objectification of women to include other factors, like race and religion. Who wouldn't want to own the headphone equivalent of a naughty Catholic schoolgirl brimming with newfound post-pubescent voluptuousness? Or maybe something with a veil over most of the bandwidth, like a muslim girl - still got those ankles and the enticing eyes.
   Had to google for the newfound postpubescent voluptuousness but otherwise a great post.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: zerodeefex on December 24, 2014, 05:52:22 AM
Are you daft? You now realize that your post was super offensive, right?
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: AZ on December 24, 2014, 06:09:17 AM
   Super offensive to whom? Silicone infused barbie girls, fat or skinny ones, black or white or those who married them? Have nothing against neither. After all those were only analogies while looks are just that, looks and it would be daft to get super offended every time they pick someone who doesn't look like our wifes for miss world or universe. 
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: zerodeefex on December 24, 2014, 06:21:46 AM
   Super offensive to whom? Silicone infused barbie girls, fat or skinny ones, black or white or those who married them? Have nothing against neither. Moreover, one can like fat girls but prefer lean sounding headphones but it would be daft to get super offended.

I suspect you have a really hard time with the opposite sex. I think this probably sums it up: https://www.youtube.com/watch?v=1RGohIKxc9M#t=351 (https://www.youtube.com/watch?v=1RGohIKxc9M#t=351)
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: AZ on December 24, 2014, 06:29:25 AM
   I once met a 70 years old lady who I thought was a second most beautiful woman I have ever seen! She looked no older then 50 and was just astonishingly beautiful. How sick would it look  if all the younger ladies including my own wife would get seriously offended by such a statement?
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Marvey on December 24, 2014, 06:31:03 AM
LOL, I bet your wife would kill you if you said that about an 18 year old instead of a 70 year old.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: AZ on December 24, 2014, 06:36:13 AM
I suspect you have a really hard time with the opposite sex. I think this probably sums it up: https://www.youtube.com/watch?v=1RGohIKxc9M#t=351 (https://www.youtube.com/watch?v=1RGohIKxc9M#t=351)
   Looks like you think too much, please don't.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: AZ on December 24, 2014, 06:42:13 AM
LOL, I bet your wife would kill you if you said that about an 18 year old instead of a 70 year old.
   Trust me she is above that. Looks are important but mostly for your own ego, time goes by and a ton of other things start to play much more important roles in any relationship.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: AZ on December 24, 2014, 06:59:59 AM
   Once met a girl who had to  dress like a boy from the age of 14 or so. She was what you would call absolutely perfect, just astonishing. I could not understand why did she have to act and dress so strange. Until one day when we went somewhere together and she was dressed appropriately.  Literally everyone would stop, shut up and stare at her when we were walking by. I have never experienced anything like that neither before nor after, ever.
   Believe it or not but she had a completely screwed up mind because of her looks and all the attention she was getting from all the men she ever knew in her life including her own father. Looks can be deceiving but I suspect some may find themselves happy being around those kind of girls.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Armaegis on December 24, 2014, 07:30:47 AM
   Had to google for the newfound postpubescent voluptuousness but otherwise a great post.

Pro tip: you're supposed to use Bing for those kind of searches...
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: aufmerksam on December 25, 2014, 02:15:59 PM
Not to get off topic, but early listening tests are putting these as a possible replacement of the HD600 for easier listening alternative to the HD800. The bass is much better (than the 600) in my opinion. What I can not tell yet is whether they will be as unfatiguing in the rest of the spectrum as the 600's have been, if that makes sense. Most of my comparo so far has been going from HD800 to either 7xxx or hd600, since the hopeful niche is "a break from the HD800" which I find I need periodically. The problem is both sound so different from the 800. Once back in town next week, I will be only comparing 600 to 7xxx and see what happens. Overall, GREAT headphones, esp for price. Super comfy, sound is solid, and bass is neither lacking nor boomy (so far).

... but I digress,

Who wouldn't want to own the headphone equivalent of a naughty Catholic schoolgirl brimming with newfound post-pubescent voluptuousness?

I think I dated this headphone in high school.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Armaegis on December 25, 2014, 04:53:11 PM

I think I dated this headphone in high school.


Were the cups open or closed?  :)p8
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: robakri on December 25, 2014, 09:14:44 PM
Head-fi thread so delish  popcorn popcorn popcorn popcorn popcorn popcorn
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Ringingears on December 26, 2014, 12:00:58 PM
I suspect you have a really hard time with the opposite sex. I think this probably sums it up: https://www.youtube.com/watch?v=1RGohIKxc9M#t=351 (https://www.youtube.com/watch?v=1RGohIKxc9M#t=351)
How did I miss this! Laughing so hard I almost wet myself. Almost. Ah, but let us not forget, Revenge of the Nerds. "All we Nerds think about is sex."

How did this go from a review of the AKG 7XXX to a comic insult dog??  I suspect alcohol was involved.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: RexAeterna on December 26, 2014, 12:33:57 PM
I like white girls with big butts. Married one.

Dat's ma nigga. Yo knowz watz up.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: kothganesh on December 30, 2014, 12:08:11 PM
A month and 6 days later, I get these in India. Thankfully zero customs duty. Driving them off the GO 720. Early impressions are very good. To my hearing these sound like a slightly darker version of the HD 600. Need to get some balanced cable for this. Is this possible?
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Ali-Pacha on December 30, 2014, 06:12:45 PM
I find them very different from the HD600.

HD600 have more low-mids ooomph, more upper treble, more details, sounds more refined, but the AKG has a bit more bass extension as well as grainy / energetic high-mids which makes them funnier and not as laid back as the Senn's (especially on voices).
Oh, and soundstage : chamber music for the Senn's, wide but very left / right oriented on the AKG.

My 2 cents, grain of salt, YMMV, and so on.

Ali
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: No_One411 on December 30, 2014, 06:42:54 PM
A month and 6 days later, I get these in India. Thankfully zero customs duty. Driving them off the GO 720. Early impressions are very good. To my hearing these sound like a slightly darker version of the HD 600. Need to get some balanced cable for this. Is this possible?

You gotta mod the connector to be mini 4-pin XLR I think.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: aufmerksam on January 05, 2015, 07:59:30 PM
I find them very different from the HD600.

Oh for sure, I was not meaning to imply the 7xxx and 600 are close in sound, and I generally agree about the comparative sounds. I am still trying to see if 7xxx will earn a spot on the desk (instead of the drawer).
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Mproietti on January 07, 2015, 03:30:19 PM
I got them last week and I have to say I like them very much... I am driving them with the ASGARD 2 and a Bifrost. I am new to the mid-fi headphone world so I do not have a lot of ability to compare like others on this forum.

Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: superballz00 on January 13, 2015, 11:33:16 PM
Is anyone experiencing the flapping noise (not rattle) due to cone breakup at higher volume with frequencies below 50Hz?

https://www.youtube.com/watch?v=B4_DSyGc3Y4
 

I've only seen it mention by a few people. One was able to produce it with a O2 on 2.5x gain at 3 o'clock while another got it to breakup with a uDAC-2 at 1-2 o'clock. The uDAC-2 is only putting out 20-25mW at those volumes. Is it acceptable for a HP to distort due to cone breakup at such a low power input? Why do people on headfi keep saying AKG headphones need a powerful amp if it can't seem to handle more than 20mW?

I just tried my K7XX with my motherboard headphone jack, the only low power amp I have, and noticed the flapping noise caused by cone breakup at 82% volume. I was using a 30hz test tone in audacity with amplitude at the default value of 0.8 to prevent clipping. I then tried my Audio Technica m50 and it didn't have the flapping noise even at 100% volume. The m50 is more sensitive than the K7XX since it was louder than the K7XX at 82%. The flapping noise on the K7XX seems to happen up to around 55hz. Has anyone noticed this problem? Can you guys try to test your K7XX to see if it's a design flaw or are some just defective?

Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Marvey on January 14, 2015, 12:17:42 AM
How loud? (I have no idea what 82% or 100% is in audacity or 3 O'clock on O2 without knowing output voltage of source). How do you know it's 20mW? Can you measure with a DMM with a steady state 30Hz on the headphones? Most importantly, are you testing or actually listening to music when the flub-flub happens? The K7XX driver isn't that big. 30Hz test tones tend to do a lot of screwy things to headphones with small drivers, e.g. Grado.

Your AT has a huge advantage in that the driver is sealed. Open-back headphones need to work harder (more excursion) to maintain same bass level.

Ppl says K series needs amp because they sound kind of dead from an iPhone and also because they are less efficient compared to Grado, AT, Denon, Fostex (dynamic) 'phones.

If the K7XX performs fine while listening to music, I wouldn't worry about it.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: ultrabike on January 14, 2015, 12:28:07 AM
I'll try to check it out later today, But don't think I've heard flapping noises so far... Will check it out.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: superballz00 on January 14, 2015, 12:53:36 AM
How loud? (I have no idea what 82% or 100% is in audacity or 3 O'clock on O2 without knowing output voltage of source). How do you know it's 20mW? Can you measure with a DMM with a steady state 30Hz on the headphones? Most importantly, are you testing or actually listening to music when the flub-flub happens? The K7XX driver isn't that big. 30Hz test tones tend to do a lot of screwy things to headphones with small drivers, e.g. Grado.

Your AT has a huge advantage in that the driver is sealed. Open-back headphones need to work harder (more excursion) to maintain same bass level.

Ppl says K series needs amp because they sound kind of dead from an iPhone and also because they are less efficient compared to Grado, AT, Denon, Fostex (dynamic) 'phones.

If the K7XX performs fine while listening to music, I wouldn't worry about it.

The person with the uDAC-2 said it was measuring 1.1V with a 60 ohm load at the volume that caused the flapping sound. The problem goes away when the frequency is a little above 50hz.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: ultrabike on January 14, 2015, 01:00:24 AM
The person with the uDAC-2 said it was measuring 1.1V with a 60 ohm load at the volume that caused the flapping sound. The problem goes away when the frequency is a little above 50hz.

Thanks for the info... Will see... Might also be able to get SPL at those levels...
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: aufmerksam on January 14, 2015, 01:54:44 AM
My methodology to test for this potential issue was as follows:

SETUP
-PC(foobar) > gungnir > asgard2 > k7xxx

FIRST
-Dig out Random Access Memories, as test album for tha sexy bass
-Listen at normal (lowish) listening volume, all the way through, to see if anything sounded "off"
RESULT: sexy album, no flappy

NEXT
-Listen to the most sub-bass filled songs
-Stare at the Foobar sprectum visualizer to verify that the tracks were laying down sexy enough bass
RESULT: visual verification of album sexyness, still no flappy

LAST
-Repeat steps in "NEXT" while incrementally increasing volume until it was loud enough that I really couldn't give a shit if such a flappy might occur, since I will never listen that loud.
RESULT: my ears hurt, still no flappy

OBJECTIVE ANALYSIS
-Unable to produce flappyness while actually listening to music
-Unclear if this implies I have a non-defective unit, or I didn't try hard enough with "real science"
-Unclear whether this study implies need to recreate youtube video magic

SUBJECTIVE ANALYSIS
-Random Access Memories is really a great album, filled with lucious hooks and sexy sub-bass
-K7XXX is a great headphone for listening to this album, way more engaging than the HD600 is, but not as immersive as the HD800
-I am still glad I paid $200 for this headphone
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: superballz00 on January 14, 2015, 02:13:08 AM
My methodology to test for this potential issue was as follows:

SETUP
-PC(foobar) > gungnir > asgard2 > k7xxx

FIRST
-Dig out Random Access Memories, as test album for tha sexy bass
-Listen at normal (lowish) listening volume, all the way through, to see if anything sounded "off"
RESULT: sexy album, no flappy

NEXT
-Listen to the most sub-bass filled songs
-Stare at the Foobar sprectum visualizer to verify that the tracks were laying down sexy enough bass
RESULT: visual verification of album sexyness, still no flappy

LAST
-Repeat steps in "NEXT" while incrementally increasing volume until it was loud enough that I really couldn't give a shit if such a flappy might occur, since I will never listen that loud.
RESULT: my ears hurt, still no flappy

OBJECTIVE ANALYSIS
-Unable to produce flappyness while actually listening to music
-Unclear if this implies I have a non-defective unit, or I didn't try hard enough with "real science"
-Unclear whether this study implies need to recreate youtube video magic

SUBJECTIVE ANALYSIS
-Random Access Memories is really a great album, filled with lucious hooks and sexy sub-bass
-K7XXX is a great headphone for listening to this album, way more engaging than the HD600 is, but not as immersive as the HD800
-I am still glad I paid $200 for this headphone


Can you try some tones or sweeps below 40hz? Music usually doesn't go that low while movies do. The volume isn't that loud when the flapping occurs on my set since there is a steep roll off below 40hz on mine. Is the bass roll off due to the HP being open? My Fischer Audio DBA-02 is pretty flat even down to 20hz while the K7XX seems to drop off by 25db.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Marvey on January 14, 2015, 04:50:59 AM
Yes, open cans will drop off in bass severely or loses heft below a certain point. Only way around it is a bigger driver like with HD800 or Sony MA100. What you are describing on K7XX sounds 100% normal to me considering the small driver which may be tweaked differently from Q series. Cone excursion is huge at 30Hz. This is why most speakers can't do 30Hz properly. IEMs tend to be flat because they are totally sealed and coupled with your eardrum.

Again, I'd stop worrying about it unless it's a problem with music. Excessive worry about these things makes you ghey. I could easily do the same thing with my open baffle speakers and make a youtube video - the drivers with 1mm excursion. But I am not going to because I am not ghey. BTW, car engines blow up when you push them past their limits too.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: donunus on January 14, 2015, 09:15:32 AM

RESULT: my ears hurt, still no flappy

My old Q701 playing random access memories using modi/vali at full volume... FLAPPY  headbang
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: robakri on January 14, 2015, 10:04:57 PM
My old Q701 playing random access memories using modi/vali at full volume... FLAPPY  headbang

Well, they reach the max power input of 200mW at around 3.5V if I remember correctly (I recently calculated it). I'm not sure what the vali outputs, but it has a gain of 4 and the modi an output of 1.5Volts, I'm not sure if I'm correct to assume that that will be more than a 3.5V output, but I think so. If it is flappy, well you are probably causing cone breakup and ruining your headphones.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: donunus on January 14, 2015, 10:35:55 PM
Actually the sound is more like it is underpowered in the way it clips causing distortion even in vocals of music. The flappy bass part actually improved quite a bit with burn in. Listening to the first track of the hunter by Jennifer warnes easily distorts my Q701 out of the Vali. Its either I need a LYR to power this thing or it is just not capable of playing loud music. Both drivers evenly distort making me think that it is a design flaw and not due to damaged drivers. Im talking 105 to 115db volume here with some music but with the Jennifer warnes cd it distorts below 100db I think maybe due to the type of bass content the recording has.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: superballz00 on January 16, 2015, 02:14:57 AM
Actually the sound is more like it is underpowered in the way it clips causing distortion even in vocals of music. The flappy bass part actually improved quite a bit with burn in. Listening to the first track of the hunter by Jennifer warnes easily distorts my Q701 out of the Vali. Its either I need a LYR to power this thing or it is just not capable of playing loud music. Both drivers evenly distort making me think that it is a design flaw and not due to damaged drivers. Im talking 105 to 115db volume here with some music but with the Jennifer warnes cd it distorts below 100db I think maybe due to the type of bass content the recording has.

Sounds about right with it distorting at around 105dB. The 20mW another user reported before the flapping sound kicked in would bring these 93dB/mW HP to around 105dB. Not sure how AKG can claim the drivers are rated for 200mW when they can't handle more than 20mW with low frequencies. At least they can fix the frequency response claim of down to 10hz with something more realistic. It probably will do 10hz but at -40dB. Was hopping these can handle at least 2V for some headroom but it doesn't seem to be able to handle much more than 1V.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: DrForBin on January 16, 2015, 06:04:13 AM
hello,

for the December holiday i received these and a Schitt Asgard 2.

i have two iTunes libraries one loss-less and one mp3 ripped through the Apple program.

i was reading a subscribed thread on that other site and listening (mp3) to this:

http://www.allmusic.com/album/slow-circle-mw0000189733

specifically "Sleeping Lady."

when an odd thing happened.

i stopped reading, i closed my eyes, opened my ears, and tears came.

guess i'm just saying that for me these are very good cans.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: donunus on January 16, 2015, 10:45:07 AM
Not sure how AKG can claim the drivers are rated for 200mW when they can't handle more than 20mW with low frequencies.
Isn't it possible that the distortion is caused by the 20mW because it is underpowered? Like a boombox driving some maggies hehehe
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Armaegis on January 16, 2015, 11:05:55 PM
I seriously doubt that the headphone would be designed to only operate between 20-200mW... that's only giving you ~10dB dynamic range in there.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: ultrabike on January 17, 2015, 02:34:54 AM
Alright, so here are some data points. First I almost never listen at loudness levels equivalent to 90 dB using a tone, much less 100 dB. Some weird high dynamic range song might come along, but even then most stuff is pretty compressed anyway.

With a 90 dB tone sweep these are the distortion plots:

(http://www.changstar.com/index.php?action=dlattach;topic=1902.0;attach=8532;image)

With a 100 dB tone sweep things get worse, and this should be expected with most dynamic cans:

(http://www.changstar.com/index.php?action=dlattach;topic=1902.0;attach=8534;image)

Now, using a 30 Hz tone at 100 dB I checked the driver: It vibrated very little and that was it. No deformation or crap like that.

100 dB is pretty loud. My 2i2 volume knob was almost all the way up, and I don't go far off half of what the 2i2 can give with these cans. Maybe 3 o'clock at most on some tracks (6 o'clock is mute, 12 o'clock is half...).

At 90 dB, the 2i2 was pushing about 0.263 Vrms or about 1.1 mW (also rms - cans are about 60 ohm). That jives well with Tyll's numbers of 0.84 mW to get 90 dB for the similar K712.

At 100 dB, the 2i2 was pushing about 0.8 Vrms or about 11 mW, which serves as a sanity check for the above.

This means that 22 mW one should expect about 103 dB and for 220 mW about 113 dB. Those numbers are kind of crazy loud for a 30 Hz sine wave. Given the distortion results at 100 dB, going that far may indeed result in driver damage on the long run. Don't do it. My 2i2 can't do it actually, but some other amps have plenty of power reserves and have no problem blowing up these and most other cans to pieces. If listening to music at these levels, hearing can give the ghost as well.

All this is not unique to the 7xx. 100 dB on HD600s, Grados, or whatever other open dynamic headphone should yield significant and apparent distortion in low frequencies. Dialing the amp to deliver > 110 dB at low frequencies may damage some of these cans as well, and IMO don't say much about the practical capabilities of the cans.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: anetode on January 17, 2015, 06:27:02 AM
Still good distortion for a dynamic even at 100db. I bet it'd be fine even with an extra 10db. Someone got a rattly driver, it happens. If one's that worried about it then send it in for a replacement or refund, or start listening to music at sane volumes instead of bottom octave test tones at deafening levels.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: ultrabike on January 17, 2015, 06:46:24 AM
Still good distortion for a dynamic even at 100db. I bet it'd be fine even with an extra 10db.

Yup. Put a 30 Hz tone at 100 dB (my 2i2 doesn't have 110 dB for these cans) and driver was IMO pretty happy... I mean the driver sort of vibrated there but had to look close to make sure it did. Furthermore, tones are to some extent as compressed as music will ever be, so pretty loud.

Based on what I saw I wouldn't worry about it.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: AZ on January 17, 2015, 08:57:23 AM
Ultra, thanks for posting those measurements. Clearly visible just what I was missing with these and explains things much better then my analogy with our better half's :-).
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: AZ on January 17, 2015, 09:12:54 AM
Afterthought: invert FR graph and stick it to the original one = female body  :)p1
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Hands on January 18, 2015, 08:12:13 AM
Wanted to share my impressions of the K7XX. Full measurements to come, hopefully within the next couple days. I did have some experimental measurements floating around in another thread, if you want an early look.

The first thing I noticed is that the K7XX sounds both a bit warm and also a bit bright and metallic at the same time. I suppose in that sense, it has a bit of a U-shaped sound signature. It's also a bit grainy sounding, but I suspect this is mostly due to the upper frequency response characteristics more than anything else. Mostly clean and clear sounding, but just a touch grainy and dirty. Not the smoothest headphone I've heard by any means. However, it does do a fairly good job resolving small details. Not the best, but pretty good, though some elements are smeared together due to the treble issues I hear. Sometimes the extra warmth gets in the way a bit here too...just a tiny bit.

Now, going entirely off of faulty memory, the K702 65th AE sounded more "shouty" where as the K7XX just sounds brighter and grainier. They might also be more similar than I remember, so take that with a grain of salt. Either way, the K7XX does become somewhat irritating and fatiguing for me rather quickly with harsh music, especially something with lots of metallics/cymbals.

Thankfully, the broad bass emphasis and warmth does help cover up and balance the upper end out to an extent. I wouldn't be able to deal with it otherwise. It's not the cleanest, clearest sounding bass ever, nor is it the punchiest, but I do like the lower end balance overall.

In terms of soundstage, these sound rather wide, but not very deep in a front-to-back manner. Center imaging can be a bit lacking at times, too left and right sounding.

Comfort seems to be rather good. Very large pads, very little clamp, rather light, and the auto-adjusting headband works well. The pads are a bit stiff and cheap feeling, but nothing major. Build quality isn't half-bad, but some of the plastic used feels a bit cheap. It does not feel like it will fall apart or break easily, however.

All said, though, while these aren't entirely my thing, I think they're a really good deal at $200.

Thankfully, if your tastes are at all like mine, I've found using some of that 1/4" open-cell foam I've linked before in other threads works surprisingly well when placed in front of the driver. Cut it in a circle and just place it there. No need to take off the pads, as if it's cut to size, it'll hold in place due to friction. And the pads are large enough that the foam doesn't irritate the ears. This smooths out and attenuates the upper-mids and treble rather well. I actually quite enjoy them like this.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Hands on January 20, 2015, 02:01:36 AM
Here be my measurements of the K7XX. I'm guessing unit-to-unit variation is pretty low, but I did want to point out this is not the exact same unit that has been measured here already. I am also using a smaller tri-flange tip for my in-ear mic, so I am able to shove it in my gross ear hole further than before. This primarily boosts the treble measurements relative to my prior setup, but in a way that should be more accurate.

Frequency response is not too surprising. Overall fairly balanced with a bit of a broad, low-end emphasis and some uneven, sometimes peaky treble.  In my listening tests, I thought the lower-end warmth did help balance out the treble, but it wasn't quite enough to my ears. Channel matching is excellent.

Distortion results are pretty good and low when 1KHz is calibrated to 90dB. Push it much further than that, though, and distortion rises rapidly.

CSDs are pretty clean with the left driver exhibiting slight ringing around 1kHz and the right driver around 2KHz. The slight ringing in the upper-most regions is probably an artifact of some sort. Overall pretty decent and nothing worth being concerned about.

Raw measurements were a bit finicky and were primarily determined by subtle mic placement and depth differences. Regardless, the end results averaged out well. This headphone is actually quite a consistent performer.

Last measurement shows what happens when you put some 1/4" open-cell foam, the grey, medium density type that I've linked in other threads before, in front of the driver as I mentioned above. It's not perfect, but it does sound noticeably smoother and more relaxed to my ears than stock.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Colgin on January 20, 2015, 02:52:11 AM
How loud? (I have no idea what 82% or 100% is in audacity or 3 O'clock on O2 without knowing output voltage of source). How do you know it's 20mW? Can you measure with a DMM with a steady state 30Hz on the headphones? Most importantly, are you testing or actually listening to music when the flub-flub happens? The K7XX driver isn't that big. 30Hz test tones tend to do a lot of screwy things to headphones with small drivers, e.g. Grado.

Your AT has a huge advantage in that the driver is sealed. Open-back headphones need to work harder (more excursion) to maintain same bass level.

Ppl says K series needs amp because they sound kind of dead from an iPhone and also because they are less efficient compared to Grado, AT, Denon, Fostex (dynamic) 'phones.

If the K7XX performs fine while listening to music, I wouldn't worry about it.

my K7xx runs fine at volumes significantly higher than what I would ordinarily listen to and with tracks having significant sub bass. That is good enough for me. No way am I running test tones at high volumes for the sake of science and seeing if I can eff up my perfectly good cans.  Sorry if some are having trouble in the context of listening to music at their own normal volumes if that, in fact, is the case for some.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: spoony on January 20, 2015, 05:56:43 AM
Last measurement shows what happens when you put some 1/4" open-cell foam, the grey, medium density type that I've linked in other threads before, in front of the driver as I mentioned above. It's not perfect, but it does sound noticeably smoother and more relaxed to my ears than stock.
That looks pretty good, but wasn't the foam 1/8"?, I have a link for a 1/8" 'charcoal' open-cell foam that I am about to order, is it the wrong one?
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Hands on January 20, 2015, 06:13:37 AM
1/4" in this particular case. You could probably double up on 1/8" too. Let me know if you need an exact link.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: superballz00 on January 20, 2015, 07:46:59 AM
Any idea what is causing the dip at 3k? Can you try to measure it without the foam ring behind the earpad? Taking the foam ring out makes them a lot more airy and open. They sound brighter with more detail kind of like the K701 with a bass bump.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: aufmerksam on January 21, 2015, 06:17:13 PM
woah. hans, I like what that 1/4" foam does to the high end on these. gotta try that.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Hands on January 21, 2015, 06:24:44 PM
Lemme know if you need a specific link. Also I can probably hook people up with samples (few folks, that is).
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: kothganesh on January 22, 2015, 05:15:09 AM
Hans,
I am interested but I live in India, I don't know the feasibility. Can you give me a specific link to the foam? Thanks
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: superballz00 on January 23, 2015, 12:02:27 AM
Do you know if there is a different type of foam that will help with the dip at 3-4K?
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: robakri on January 25, 2015, 10:49:20 PM
Lemme know if you need a specific link. Also I can probably hook people up with samples (few folks, that is).
I'd love a specific link :)
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: antifocus on January 26, 2015, 12:58:28 AM
Hello Hans,

I would also love to have the link/samples.
Thanks!
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Hands on January 26, 2015, 10:03:47 PM
Specific material I used (1/4" thickness): http://www.foambymail.com/CR/solid-charcoal-regular-foam.html

It's decent stuff to have around for general modding. Best way to go about ordering from the site is to get a selection of material to play around with and to just keep on hand for any mods that come your way, that way the shipping costs are more worth it.

But for anyone that just wants a small sample for the K7XX, feel free to PM me your address (must be CONUS), and I'll eventually compile a list of people to send stuff to.
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: eddypoon on January 27, 2015, 10:52:31 PM
the 7xxx is available again on mass drop FYI
Title: Re: AKG 7XXX (Massdrop) Measurement and Succinct Review
Post by: Marvey on January 28, 2015, 12:27:30 AM
I updated the first post with indices to Hans and UB measurements.
Title: Re: AKG 7XX (Massdrop) Measurement and Succinct Review
Post by: Oktyabr on January 30, 2015, 07:10:32 AM
Thanks for the measurements!  Has anyone published comparison measurements between these and any of the other AKG K/Q line up?  I own the K712 and have a pair of K7XX on the way.  Used to own a pair of the original K701 (sold due to painful dents in the top of my head) and wonder if there is any measurable difference?  Thanks in advance!

PS  For what it's worth a comment on hedfi that I had actually found K7XX measurements here was edited by an admin, removing the reference.  I would ask what that is all about but I'm pretty sure I really don't want to know...
Title: Re: AKG 7XX (Massdrop) Measurement and Succinct Review
Post by: spoony on January 30, 2015, 03:18:25 PM
The answer is 'for myriad reasons'.
Title: Re: AKG 7XX (Massdrop) Measurement and Succinct Review
Post by: DrForBin on January 31, 2015, 04:12:08 AM
Thanks for the measurements!  Has anyone published comparison measurements between these and any of the other AKG K/Q line up?  I own the K712 and have a pair of K7XX on the way.  Used to own a pair of the original K701 (sold due to painful dents in the top of my head) and wonder if there is any measurable difference?  Thanks in advance!

PS  For what it's worth a comment on hedfi that I had actually found K7XX measurements here was edited by an admin, removing the reference.  I would ask what that is all about but I'm pretty sure I really don't want to know...

hello,

you might want to look at this: http://www.changstar.com/index.php/topic,1550.0.html

for my part, i am really resisting the urge to post on that "other site."

but i really want Jason to make "Schiit Happened: The Story of the World's Most Improbable Start-Up" available as an ebook.
Title: Re: AKG 7XX (Massdrop) Measurement and Succinct Review
Post by: superballz00 on February 01, 2015, 02:00:14 AM
Thanks for the measurements!  Has anyone published comparison measurements between these and any of the other AKG K/Q line up?  I own the K712 and have a pair of K7XX on the way.  Used to own a pair of the original K701 (sold due to painful dents in the top of my head) and wonder if there is any measurable difference?  Thanks in advance!

PS  For what it's worth a comment on hedfi that I had actually found K7XX measurements here was edited by an admin, removing the reference.  I would ask what that is all about but I'm pretty sure I really don't want to know...

They don't like anything negative about products being discuss and will flat out ignore facts and measurements. I had members jump on me for telling someone, after he asked, that the QC hasn't been improved on the second batch of the K7XX. One of them kept saying that it had been improve and kept linking me to the MassDrop official response that actually states the opposite. When you call them out for making stuff up to try to get more people to buy stuff they say that you are derailing the thread and want to get back to the circle jerking.



Has anyone tried listening or measuring the K7XX without the foam on the outer caps? A member on HF removed the outer caps and there is a piece of foam on the inside of the cap that I guess is there to help boost the bass. I don't see this piece of foam on the parts diagram of the K702 Annies or the K712. Do either of those have the foam on the outer caps? It would makes sense since the K7XX didn't feel that open when I first listened to it, nowhere near as open as the K702. Has anyone firgured out what is causing the dip at between 3k-5k?

http://www.head-fi.org/t/743280/new-release-the-k7xx-massdrop-first-edition-an-exclusive-from-massdrop-and-akg/1440#post_11267219
Title: Re: AKG 7XX (Massdrop) Measurement and Succinct Review
Post by: Hands on February 01, 2015, 02:51:56 AM
I have a Q701 on hand as well and could try poking around with the K7XX (back foam removal, other tweaks, etc.).
Title: Re: AKG 7XX (Massdrop) Measurement and Succinct Review
Post by: funkmeister on February 03, 2015, 09:28:04 PM
Haha! Suspicion confirmed. When I saw the initial measurements on the K7XX, the FR wonkiness made me feel that there had to be some kind of wave cancellation affect going on to make such deep valleys. Looks like the foam knocks it down a bit. When the peaks dropping raises the valleys, it's a wave interaction issue. Those suck, in my book.
Title: Re: AKG 7XX (Massdrop) Measurement and Succinct Review
Post by: superballz00 on February 04, 2015, 06:52:07 AM
Doesn't seem to change the FR too much. A tad less bass as expected but mostly mid and upper bass so it sounds less boomy which is a good thing. Sounds brighter due to the decrease in bass but I'm not sure it did anything to the dip between 3k-5k. It would be great is someone can measure theirs with the foam on the outer caps removed. The biggest change is the soundstage. It's much wider and sound like an open HP. I was always puzzled at the semi closed sound of the K7XX at first. Now everything makes sense. Can someone confirm that the other K7s and the Q701 don't have the foam covering the outer caps?
Title: Re: AKG 7XX (Massdrop) Measurement and Succinct Review
Post by: robakri on February 05, 2015, 12:20:55 AM
Removed the foam on the back caps. I tried to do some tests between cups and on/off but I'm not very experienced with these things. What I perceive is possibly added clarity, I dunno, I have to to 100% honest and say I'm not convinced it's not a placebo. If there is a difference in measurements between on and off I'd guess it would show in CSD plots. The only thing that has bothered me with these cans has been a slightly slow bass response on some tracks (or that is what I think it is), it makes the bass sound somewhat unreal sometimes by lingering too long or not responding too fast in a way. Anyway, if a mod ever was reversible, this one is :)
Title: Re: AKG 7XX (Massdrop) Measurement and Succinct Review
Post by: Marvey on February 05, 2015, 12:24:10 AM
I'll get some measurements of this. I want to tweak this headphone for my own purposes anyways.
Title: Re: AKG 7XX (Massdrop) Measurement and Succinct Review
Post by: funkmeister on February 05, 2015, 08:35:39 PM
Can I just ask what the fuddly-duddly is going on that AKG is not cranking out the goods like they once did? It seems like everything after the K240DF and K1000 has been massive work in progress or a piece of crap. It's nice to see that the K612 and K7XX are showing that some things are a work in progress but one step forward another step back it seems with AKG. I look at this and think it's halfway beyond being able to mod the thing into a good place.

Keep in mind that I own two of their headphones and on one I can't get the bass in a good place, and the other requires 11, yes e-l-e-v-e-n, points of EQ to sound right. They take the EQ incredibly well, though.

Ug. OK. I've vented. Bipolar moment: Now I'm seriously interested in these things. If we can get some of the internal reflections under control up in the treble it should help improve its resolution while reducing the grain/grit.
Title: Re: AKG 7XX (Massdrop) Measurement and Succinct Review
Post by: superballz00 on February 05, 2015, 09:05:16 PM
I'll get some measurements of this. I want to tweak this headphone for my own purposes anyways.

It would be great if you can test it without the foam disk behind the ear pads as well.
Title: Re: AKG 7XX (Massdrop) Measurement and Succinct Review
Post by: Hands on February 09, 2015, 09:51:20 PM
Okey dokey, grabbed some quick measurements takes of the left channel with a couple tweaks. First is removing the foam disc from the nipple portion of the back of the headphone. I didn't have time to listen, but measurements suggest this boosts the bass a tad and slightly lowers the 7KHz peak. Might be a slight distortion rise in the bass as well, perhaps more so than the relative bass increase, but maybe not. CSDs attached as well.

Also wanted to see what happens if you close up the back of that whole nipple portion in the middle. Again, didn't listen, but looks like this might also boost the bass. Might lower the treble a bit. But what you do get is an even nastier peak in that 1-2KHz region. CSDs and distortion results attached as well. I forgot to change the title of the graph...the one that says "stock vs foam disc insert" should instead say closed middle back/nipple whatever.

For reference, also included the stock measurements. Instead of being averages from 4 takes (2 each from left and right ear), these were just 2 takes from my left ear so I could match the results of the quick mod measurements.
Title: Re: AKG 7XX (Massdrop) Measurement and Succinct Review
Post by: money4me247 on May 14, 2015, 03:11:51 AM
To the experienced folks at changstar,

I recently got into the measurement game on posted a review on the k7xx here (http://www.head-fi.org/products/akg-k7xx/reviews/13116). My measurement set-up was: Dell XPS m1530 with Windows 7 > ARTA Generates Sine Sweeps > Steinberg UR-22 USB Interface with Yamaha ASIO > Line Out > Oppo HA-2 Amplifier > headphones placed upon my own head (left ear being measured) > Pannasonic WM61-A Microphone > Steinberg UR-22 > Laptop > ARTA analysis.

another head-fi member suggested that I post here to get some feedback on my measurements.

edit: not sure how to post my pictures within a post after searching the website, but if someone kind can PM me how to do it, I can upload all my measurements for quick viewing.
edit2: thank you all for everyone who responded so quickly!
edit3: picture naming: PN = pink noise sine sweep, WN = white noise sine sweep, s24 = smoothing to 1/24 octave.
edit4: have some comparative FR on other headphones in the review under spoiler tags (didn't want to clutter up my post here)

thank you all for your help & have a great day! cheers :)

ps: special thanks to hans030390 and Bluemonkeyflyer for getting me started with great feedback & advice!
Title: Re: AKG 7XX (Massdrop) Measurement and Succinct Review
Post by: ultrabike on May 14, 2015, 03:19:30 AM
Very nice review and measurements! How are you coupling the cans to the mic? (BTW, money, forgetaboutit)
Title: Re: AKG 7XX (Massdrop) Measurement and Succinct Review
Post by: Marvey on May 14, 2015, 03:27:46 AM
To the experienced folks at changstar,

I recently got into the measurement game on posted a review on the k7xx here (http://www.head-fi.org/products/akg-k7xx/reviews/13116).

another head-fi member suggested that I post here to get some feedback on my measurements.

edit: not sure how to post my pictures within a post after searching the website, but if someone kind can PM me how to do it, I can upload all my measurements for quick viewing.

thank you all for your help & have a great day! cheers :)

You should be able to post pix now. Very nice work over there on HF.
Title: Re: AKG 7XX (Massdrop) Measurement and Succinct Review
Post by: DrForBin on May 14, 2015, 03:43:42 AM
hello,

@money4me247. very nice, in-depth review. but as for those of us in mid-fi land, these cans rox! headbang
Title: Re: AKG 7XX (Massdrop) Measurement and Succinct Review
Post by: money4me247 on May 14, 2015, 03:47:06 AM
Very nice review and measurements! How are you coupling the cans to the mic? (BTW, money, forgetaboutit)
I am not sure if I understand your question correctly as I am relatively new to the measuring scene, but I've updated my initial post to include my measurement set-up. I have a DIY Panasonic WM61-A mic capsule attached to the large Etymotic triflange ear tip with a phantom power supply (inserted in my own left ear). I use the Steinberg UR22 as the microphone pre-amp. if I am totally answering the wrong question, please let me know and I'll try my best to re-answer.

You should be able to post pix now. Very nice work over there on HF.
thank you for the prompt response and kind words!

I am open to critical comments as well. I am relatively new to this aspect of the hobby and am trying to improve! :) thank you all for the feedback
Title: Re: AKG 7XX (Massdrop) Measurement and Succinct Review
Post by: ultrabike on May 14, 2015, 04:04:59 AM
I am not sure if I understand your question correctly as I am relatively new to the measuring scene, but I've updated my initial post to include my measurement set-up. I have a DIY Panasonic WM61-A mic capsule attached to the large Etymotic triflange ear tip with a phantom power supply (inserted in my own left ear). I use the Steinberg UR22 as the microphone pre-amp. if I am totally answering the wrong question, please let me know and I'll try my best to re-answer.

Nope. You answered quite well. Welcome and hope to see more of you around here! :)
Title: Re: AKG 7XX (Massdrop) Measurement and Succinct Review
Post by: AZ on May 14, 2015, 05:06:09 AM
I am open to critical comments as well. I am relatively new to this aspect of the hobby and am trying to improve!  thank you all for the feedback
   Very thorough review, great job! I would recommend comparing these to a Philips Fidelio X2 but am afraid you will have to introduce additional points to an existing head-fi scoring system ;-).
Title: Re: AKG 7XX (Massdrop) Measurement and Succinct Review
Post by: SlickSteiner on June 02, 2015, 06:34:32 AM
Hi guys just bought this headphone from the recent massdrop sale.
What are the recommended amps to drive this headphone? (preferably portable)
Title: Re: AKG 7XX (Massdrop) Measurement and Succinct Review
Post by: joch on June 02, 2015, 04:54:09 PM
Hi guys just bought this headphone from the recent massdrop sale.
What are the recommended amps to drive this headphone? (preferably portable)

There are some ideas on the Pyrate Leaderboard, like the Leckerton or the GO450

http://www.changstar.com/index.php/topic,1803.0.html
Title: Re: AKG 7XX (Massdrop) Measurement and Succinct Review
Post by: gixxerwimp on July 07, 2015, 07:30:54 AM
My set from the recent unnumbered Limited Edition drop should be arriving within a few weeks (hopefully).

Does anyone have any more mod ideas/results beyond taking out the foam disc behind the earpads and removing/sealing the foam under the nipple cap on the back?
Title: Re: AKG 7XX (Massdrop) Measurement and Succinct Review
Post by: gixxerwimp on July 10, 2015, 01:43:35 PM
Just got mine from the most recent drop. I thought they weren't supposed to be numbered, but mine are in the 5800s. Highs were really harsh out of the box, but smoothed a bit after an hour or two. nice rich bass that extends fairly low. Got them in the cupboard plugged into an iPad and under a towel. They're way lighter and more comfortable than I imagined. My first pair of half decent open cans.

I saw this post by Tor4. Has anyone tried the felt rings with the K7XXs?
http://www.changstar.com/index.php/topic,2127.msg58309.html#msg58309

Thankfully, if your tastes are at all like mine, I've found using some of that 1/4" open-cell foam I've linked before in other threads works surprisingly well when placed in front of the driver. Cut it in a circle and just place it there. No need to take off the pads, as if it's cut to size, it'll hold in place due to friction. And the pads are large enough that the foam doesn't irritate the ears. This smooths out and attenuates the upper-mids and treble rather well. I actually quite enjoy them like this.

I guess hans030390's 1/4" disc of foam could be put under the pad and would be more comfortable on the ear. Mine already touch the inside of the cups, and I wouldn't say I have Jumbo ears.

All I have to do is hunt down an arts&crafts store in Taipei ...  :-S
Title: Re: AKG 7XX (Massdrop) Measurement and Succinct Review
Post by: Hands on July 10, 2015, 05:07:35 PM
Try felt first. The material I used is usually used for packaging or stuff like seat cushioning.
Title: Re: AKG 7XX (Massdrop) Measurement and Succinct Review
Post by: gixxerwimp on July 13, 2015, 01:59:58 AM
Try felt first.

Gotcha. Now I just have to find some.
Title: Re: AKG 7XX (Massdrop) Measurement and Succinct Review
Post by: gixxerwimp on July 15, 2015, 05:04:19 AM
Got about 100 hours on them and the improvement (reduction in over-brightness) seems to have flattened out. Found some material at a stationary store that's more "fleece" than "felt", Will try it out and see if it tames the highs (main problem is sibilance).
https://www.dropbox.com/s/ka0muried9q647h/20150715_124924-1.jpg?dl=0 (as a lowly Swabbie, I don't think I have image upload privileges)
If this doesn't work, I've got a lead on where to find some real wool felt in the fabric district of town.

There's lots of info on opening up the "bass port" to increase bass response. Is there any way to tone it down a bit? I find that the bass is sometimes a bit too much.
Title: Re: AKG 7XX (Massdrop) Measurement and Succinct Review
Post by: spoony on August 28, 2015, 03:46:19 PM
The rings work, but add too much of it and you will end up with a very warm pair. About lowering the bass, I think you will have to dampen the driver further, perhaps you may want to try blocking the 'nipple part' of the cup vents with something porous like micropore or even electrical tape to see if it makes any difference.