CHANGSTAR: Audiophile Headphone Reviews and Early 90s Style BBS

  • December 31, 2015, 09:10:04 AM
  • Welcome, Guest
Please login or register.

Login with username, password and session length
Advanced search  
Pages: [1] 2 3 4 5 6

Author Topic: Fuzzy Jerg pad vs. pleather stock pad on HE400  (Read 9176 times)

0 Members and 1 Guest are viewing this topic.

Marvey

  • The Man For His Time And Place
  • Master
  • Pirate
  • *****
  • Brownie Points: +555/-33
  • Offline Offline
  • Posts: 6698
  • Captain Plankton and MOT: Eddie Current
Fuzzy Jerg pad vs. pleather stock pad on HE400
« on: September 16, 2013, 08:51:55 PM »

This is the second headphone Thujone sent to me. Fuzzy Jerg pad vs. pleather stock pad on HE400.
« Last Edit: October 08, 2013, 04:47:02 PM by purrin »
Logged

Thujone

  • Able Bodied Sailor
  • Pirate
  • ***
  • Brownie Points: +10/-1
  • Offline Offline
  • Posts: 261
Re: Fuzzy Jerg pad vs. pleather stock pad on HE400
« Reply #1 on: September 16, 2013, 10:48:43 PM »

Thank you again for the measurements! I'm not really sure how to describe the bass department... maybe all that fabric is dampening the sub bass too much? This is a velour pad stretched around a pleather pad with the jerg holes cut out and rear vents.

Actually, even though I didn't want to mess with them, do you think you can pull off the spacers for the rear vent? There should be 4 foam pieces on each side, you may be able to grab them with pliers without having to take the entire pad off (they do have adhesive on the pad side FYI). You can take the whole pad off if you need to, I've got more tape here. I'm wondering what the vent is doing to the sound. If you wouldn't mind removing the foam pieces and letting the entire pad make a seal...
Logged

TMRaven

  • Able Bodied Sailor
  • Pirate
  • ***
  • Brownie Points: +34/-4
  • Offline Offline
  • Posts: 390
Re: Fuzzy Jerg pad vs. pleather stock pad on HE400
« Reply #2 on: September 16, 2013, 11:59:37 PM »

I knew that sub-bass mod of Jerg's didn't work when I tried it out.  Do you have a pair of stock velours for comparison sake?

It's kinda funny how the THD is different with just the pads.  The Jerg-pads give more THD in the bass but the regular pleathers give more thd in the mids.
« Last Edit: September 17, 2013, 12:07:07 AM by TMRaven »
Logged

Thujone

  • Able Bodied Sailor
  • Pirate
  • ***
  • Brownie Points: +10/-1
  • Offline Offline
  • Posts: 261
Re: Fuzzy Jerg pad vs. pleather stock pad on HE400
« Reply #3 on: September 17, 2013, 12:32:25 AM »

There is still a significant bass hump though. Too bad it rolls off so quickly...
Logged

Marvey

  • The Man For His Time And Place
  • Master
  • Pirate
  • *****
  • Brownie Points: +555/-33
  • Offline Offline
  • Posts: 6698
  • Captain Plankton and MOT: Eddie Current
Re: Fuzzy Jerg pad vs. pleather stock pad on HE400
« Reply #4 on: September 17, 2013, 12:42:04 AM »

Well, the rolloff isn't horrible - noting the ticks of the graph go down to 10Hz. It does result in nice bass boost at 50Hz.
Logged

Thujone

  • Able Bodied Sailor
  • Pirate
  • ***
  • Brownie Points: +10/-1
  • Offline Offline
  • Posts: 261
Re: Fuzzy Jerg pad vs. pleather stock pad on HE400
« Reply #5 on: September 17, 2013, 01:43:03 AM »

20-35Hz is kind of a bummer. Still though, I have been enjoying that hump. Also, the treble isn't as bothersome with these pads compared to stock. Not quite as tizzy.
Logged

jerg

  • Able Bodied Sailor
  • Pirate
  • ***
  • Brownie Points: +41/-2
  • Offline Offline
  • Posts: 466
Re: Fuzzy Jerg pad vs. pleather stock pad on HE400
« Reply #6 on: September 17, 2013, 02:29:05 AM »

The bass behaviour is definitely strange. I don't get anything like that with my HE400s coupled with my modded pads, should still be fairly flat (if not a slight roll-off) going from 100 Hz to 50 Hz, a gentle roll-off between 40-28 Hz, then a real roll-off below 28 Hz. HE400 drivers are intrinsically rolled-off about 28 Hz so..

The lowered midrange THD is as expected, that was one of the main goals of the mod was to lower the midrange glare inherent in the pleather design; the improved congruence in the midrange~treble transition looks similar to how the HE500s with the early modded pads looked like, with the treble a bit more in line with the rest of the FR.

But yeah, very curious indeed! Thanks for measuring.



Edit: btw Marv, by "stock pleather earpads" do you mean the stock earpads with or without the inserted foam rings?

Also did you measure the HE400s with the modded pads as is, or after you've taken them off and put them back on? There is always the possibility that the adhesive feet are not bonded properly, or the mounting ring clips not clipped in properly. If anything the roll-off should be at least on-par with stock pleather earpads, there is nothing about the modding steps that feasibly reduce bass extension.
« Last Edit: September 17, 2013, 04:02:19 AM by jerg »
Logged

AstralStorm

  • Speculation and Speculums
  • Able Bodied Sailor
  • Pirate
  • ***
  • Brownie Points: +250/-164
  • Offline Offline
  • Posts: 559
  • Warning: causes nearby electronics to go haywire
Re: Fuzzy Jerg pad vs. pleather stock pad on HE400
« Reply #7 on: September 17, 2013, 06:58:38 AM »

I'd say do non-fuzzy jergpads. Fuzzy ones had subbass rolloff and some bass quality issue I couldn't exactly pinpoint, so I got rid of the fuzzy layer. (Plus this fuzz is harsh in touch.)
When I attached them using duct tape on the sides instead of two-sided tape in the center, the hump went away. The hump got worse when I rubber glued the pads to the ring. I bet this is due to vibration from the driver conducting into pads and then ears.

Caveat: HE-500.
« Last Edit: September 17, 2013, 07:08:43 AM by AstralStorm »
Logged
For sale: Hifiman HE-500; Paradox; Brainwavz B2. PM me if you would like to buy them.

Thujone

  • Able Bodied Sailor
  • Pirate
  • ***
  • Brownie Points: +10/-1
  • Offline Offline
  • Posts: 261
Re: Fuzzy Jerg pad vs. pleather stock pad on HE400
« Reply #8 on: September 17, 2013, 01:44:20 PM »

Also did you measure the HE400s with the modded pads as is, or after you've taken them off and put them back on? There is always the possibility that the adhesive feet are not bonded properly, or the mounting ring clips not clipped in properly. If anything the roll-off should be at least on-par with stock pleather earpads, there is nothing about the modding steps that feasibly reduce bass extension.

I'm guessing the stock measurement was done on a different pair of HE-400's. I'm leaning towards the back vent being the sub-bass thief... though I agree with you. Very curious.
Logged

Hands

  • Pizza the Hutt
  • Mate
  • Pirate
  • ****
  • Brownie Points: +331/-8
  • Offline Offline
  • Posts: 1591
  • Master of Revelatory Bird Calls and Fine Art
Re: Fuzzy Jerg pad vs. pleather stock pad on HE400
« Reply #9 on: September 17, 2013, 02:35:08 PM »

When I modded my D2000 to be open-back, I lifted the pads off the attachment plate/baffle. The locking pegs acted as "legs" then, so air vented under the entire pad (minus the pegs and velcro pieces I used to attach pads). For more information, here is the thread I made for the mod on HF:

http://www.head-fi.org/t/569094/open-back-mod-for-denon-d2000-5000-7000-fr-measurements-available-updated-11-1-2011

I got the idea from lmswjm, who actually sent purrin his version of the mod for measurements (available on this site). The primary difference between his mod and mine (besides D2000 vs D7000) was that he sealed that gap under the pads, and I don't believe he removed that small bit of paper(?) damping behind the driver or put a couple layers of foam in front of the drivers like I did (I was really trying to tame the peaks and ringing around 4-5KHz and 7-8KHz).

I made several changes after that post on HF. You can see that I never got around to updating it. The modding spiraled out of control, and before I knew it, I had a really messed up, almost unusable headphone. I had to toss them eventually. But, to get on with my point, see the differences vs my open-back mod and the stock D2000 (mine was not the latest version of the D2000, so I'm using Tyll's older measurements of the two). This was also before I went crazy with modding them into total crap...at least somewhat, I think. It's hard to remember:

Stock: http://www.innerfidelity.com/images/DenonAHD2000.pdf

Open-back mod: http://www.innerfidelity.com/images/DenonAHD2000DIYModifiedHans030390.pdf

Now, I'm not sure if it was the lifted, vented pads that caused it, but the changes in the bass on the HE400 here remind me of my D2000 mod. At the time, I thought it had improved the bass, cleaned it up, and kept the same, low extension as before. If the measurements were correct, my ears were fooling me. I actually did quite like how they sounded, though...very open, yet still could be powerful and intimate/close. I thought the upper mids and treble were much smoother. I liked it...but that's a side point. (I actually sent them to LFF to listen to...doubt he remembers it, haha, but that's off topic..sorry)
Logged
The other master and I invite you to visit our digital museum of fine art and revelatory bird calls: https://www.facebook.com/SchrodsonkMuseum
Pages: [1] 2 3 4 5 6