= Hifiman HE500 & HE400 Jergpad Mod v2.0 = - Page 26

Quote:

Originally Posted by beaver316 

Jerg, what's your opinion on how the jergpads sound in comparison to velour in the really low sub bass region? Im trying to compare but it's harder than I thought. I think the jergpads lose a little sub bass presence.

By default pleathers have a bit more of a sub-bass rolloff compared to velours. My hypothesis is that since velours are thicker, they press against your head harder and so the contact between the earpad mounting ring and the headphone cup is more rigid, conducting the <30Hz subbass better.

However I described a modification that makes sub-bass extension very competent even with the shallow pleathers/jergpads earlier, it basically puts their sub-bass on a level field with velours or other thicker pads e.g. j$'s:

http://www.head-fi.org/t/646812/hifiman-he500-he400-jergpad-mod-revised-jan-22-2013/345#post_9179378

It works extremely well, on my HE500s the 20-24 Hz region which was previously flabby and without any air movement is now very tight and strong. I'd say there's about 5 dB roll-off from 30Hz down to 22 Hz, then another 5 dB roll-off from 22 Hz to 20 Hz. Beforehand it was a cliff past 30 Hz.

My guess is a major contributor to Audeze's amazing bass extension is also this, the fact that the bass of the earpads are actually adhered to the headphone cups.

Quote:

Originally Posted by beaver316 

I may try that out, it would also be interesting to see that mod done on velours which already have better sub bass.

It's a semi-permanent mod, and might be a little messy to clean up (not impossible though since it's just double-sided tape). 

My guess is the velours with or without this mod will have similar sub-bass, since its mounting ring is already pressing hard against the cup. You are free to try though, would be interesting.

By the way, for at least somewhat objective testing, use sinewave sweeps e.g. SineGen program.

Quote:

Originally Posted by davidsh 

I guess I would want to use as thin double-sided tape as possible? I'm missing my sub/deep bass a little since doing the vent mod

First off adjust the vent mod based on my diagram there (only have 1/4 section of the mounting ring with tape stacks, so that the other 3/4 could be adhered to the headphone cup).

As for tapes, here's what I use (it's just double-sided adhesive tape I picked up at a dollar store):

Quote:

Originally Posted by Clemmaster 

I cut some holes (big ones) in my pleather pair few weeks ago.

The pads have been lying on my desk since then and I noticed today that they became quite hard.

 

Did you notice something similar with your pair? Could this be a side effect of exposing the foam to ambient air?

Nope. The memory foam is responsive to heat and moisture (high heat and/or high moisture = it gets softer, otherwise it hardens), nothing to be alarmed about.

Quote:

Originally Posted by lokimlin 

Yo jerg this mod is great I feel like my music is a little bit more realistic with the mod feels more like live music no. Anyhows im having some trouble at treble peaks where the sound is staticy or starts to fuzz. The velours have them too I now notice but the mod makes the problem stick out more what could cause this do I need an amp? Sorry a noob here.

Did you glue the pleather dust screen back on? It filters the treble peak out quite well for HE400.

For anyone contemplating trying the Jergpad mod but haven't done it yet, please hold off for now. I will probably be composing a v2.0 guide very very soon (within a week or two if things go well). It will be much less scatter-brained, and the steps will be easier and less destructive.

Quote:

Originally Posted by eddiek997 

 

Lots of people just cued up Cher "If I could turn back time"...

Yeah I kinda feel bad for everyone who committed to my v1 jergpads, then again, I did too, twice actually. So I don't feel that bad 

Actually had to buy new pleathers to formulate this new version, so it's not like I scammed you guys by hidding "the true" version, but rather it's a natural evolution that costed me too. For those of ya who have already done the v1, think of it as a good opportunity to redo and refine your pad modding skills, since you've already had a chance to do all that damping hole cutting, it won't be testing waters any more.

Anyway I have close to finished the text sections of the v2.0 guide now, all I need now is to receive the candidate pleathers/velours from another user, and do the modifications on them and take the appointed photos (about 25 or so photos needed at specific steps to fit with my pre-written guide).