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Author Topic: AKG 7XX (Massdrop) Measurement and Succinct Review  (Read 53812 times)

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superballz00

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Re: AKG 7XX (Massdrop) Measurement and Succinct Review
« Reply #270 on: February 05, 2015, 09:05:16 PM »
Quote from: 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.

It would be great if you can test it without the foam disk behind the ear pads as well.
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Hands

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Re: AKG 7XX (Massdrop) Measurement and Succinct Review
« Reply #271 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.
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money4me247

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Re: AKG 7XX (Massdrop) Measurement and Succinct Review
« Reply #272 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!
« Last Edit: May 14, 2015, 03:51:02 AM by money4me247 »
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ultrabike

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Re: AKG 7XX (Massdrop) Measurement and Succinct Review
« Reply #273 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)
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Marvey

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Re: AKG 7XX (Massdrop) Measurement and Succinct Review
« Reply #274 on: May 14, 2015, 03:27:46 AM »
Quote from: 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).

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.
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DrForBin

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Re: AKG 7XX (Massdrop) Measurement and Succinct Review
« Reply #275 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
« Last Edit: May 14, 2015, 05:12:09 AM by DrForBin »
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money4me247

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Re: AKG 7XX (Massdrop) Measurement and Succinct Review
« Reply #276 on: May 14, 2015, 03:47:06 AM »
Quote from: 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)
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.

Quote from: purr1n on May 14, 2015, 03:27:46 AM
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
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ultrabike

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Re: AKG 7XX (Massdrop) Measurement and Succinct Review
« Reply #277 on: May 14, 2015, 04:04:59 AM »
Quote from: money4me247 on May 14, 2015, 03:47:06 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! :)
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AZ

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Re: AKG 7XX (Massdrop) Measurement and Succinct Review
« Reply #278 on: May 14, 2015, 05:06:09 AM »
Quote from: money4me247 on May 14, 2015, 03:47:06 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 ;-).
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SlickSteiner

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Re: AKG 7XX (Massdrop) Measurement and Succinct Review
« Reply #279 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)
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