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= Hifiman HE500 & HE400 Jergpad Mod v2.5 = - Page 86

post #1276 of 1702

I've thought about doing something similar with a tapered spacer underneath the back side of the pads. Haven't come up with a good permeable material though... maybe extra foam from a cut-up pleather pad?

post #1277 of 1702
Quote:
Originally Posted by jerg View Post
 

I'm tempted to do another modification, after some random brainstorming last few days.

 

Using threads knots to make the front half of the earpads thinner, thus slanting the Jergpads? I think I'll try it tonight. It should be fairly reversible (just cut the thread knots and pop the threads out).

 

So stitch the front of the pads to pinch them, thus making angled pads?  Sounds like you're talking about a series of separate threads (loops, if you will), with the threads pulled tight and knotted, which causes the pinching.  If I'm right, that shouldn't be too hard, and is reversible, as you say.

post #1278 of 1702
Quote:
Originally Posted by Thujone View Post

Whoops, I misread your post. Thought you said that the modded cup was the one that rumbled, my mistake.

No, the reason I was interested in some sort of vibrational damping was because the rumble would get distracting, particularly with some of the tracks I listed. With the dynamat, it's noticeably reduced but you still get that seismic quality but it'll also be more weighty and tight.

I travel a lot for work so next time I'm away for a few weeks, I wouldn't mind sending my headphones to someone (at my expence) that can provide measurements. It would help in getting a more objective understanding of what the felt and dynamat do.
post #1279 of 1702
Thread Starter 
Quote:
Originally Posted by ThurstonX View Post
 

 

So stitch the front of the pads to pinch them, thus making angled pads?  Sounds like you're talking about a series of separate threads (loops, if you will), with the threads pulled tight and knotted, which causes the pinching.  If I'm right, that shouldn't be too hard, and is reversible, as you say.

Yep and yep. 

 

I'm debating whether or not these thread loops should pass through everything (velour top, pleather, foam, vinyl undercover, dustscreen fabric) or just some of them. Passing through everything would increase the durability of the pinch in the long run, but it might pose comfort / earpad-washing problems.


Edited by jerg - 11/22/13 at 8:55am
post #1280 of 1702

Jerg, you didn't answer my question. Could be the increase in harmonic distortion at the sub-bass a result of the backvent mod or it's inherent to the pad itself?

post #1281 of 1702
Quote:
Originally Posted by kard16 View Post


No, the reason I was interested in some sort of vibrational damping was because the rumble would get distracting, particularly with some of the tracks I listed. With the dynamat, it's noticeably reduced but you still get that seismic quality but it'll also be more weighty and tight.

I travel a lot for work so next time I'm away for a few weeks, I wouldn't mind sending my headphones to someone (at my expence) that can provide measurements. It would help in getting a more objective understanding of what the felt and dynamat do.

 

That would be awesome! purrin is very reasonable with doing new measurements. I sent him my HE-400's to get the jergpad measurements at the beginning of this post, for example.

post #1282 of 1702
Thread Starter 
Quote:
Originally Posted by Okamoto View Post
 

Jerg, you didn't answer my question. Could be the increase in harmonic distortion at the sub-bass a result of the backvent mod or it's inherent to the pad itself?

I think breaking the seal in any way increases measured subbass third-order distortion, the bigger the seal breakage the higher the distortion figure; so backvent / outer ports will all do something. On the other hand seal breakage of the earpad seems necessary with HE500s to really bring clarity to its midrange/upper end, to me.

 

In practice it's really a minor trade-off I think. I don't hear the extra distortion at all with music with low bass.


Edited by jerg - 11/22/13 at 9:00am
post #1283 of 1702
Quote:
Originally Posted by jerg View Post

 

I think breaking the seal in any way increases measured subbass third-order distortion, the bigger the seal breakage the higher the distortion figure; so backvent / outer ports will all do something. On the other hand seal breakage of the earpad seems necessary with HE500s to really bring clarity to its midrange/upper end, to me.



 



In practice it's really a minor trade-off I think. I don't hear the extra distortion at all with music with low bass.







Thanks for the reply jerg.



I'm in a dilemma here. I'm a little paranoid about dust protection, but at the same time I want the best attainable SQ. Damn dust. Things would me much simpler if there was no dust.


Edited by Okamoto - 11/22/13 at 9:23am
post #1284 of 1702
Thread Starter 
Quote:
Originally Posted by Okamoto View Post
 
Quote:
Originally Posted by jerg View Post

 

I think breaking the seal in any way increases measured subbass third-order distortion, the bigger the seal breakage the higher the distortion figure; so backvent / outer ports will all do something. On the other hand seal breakage of the earpad seems necessary with HE500s to really bring clarity to its midrange/upper end, to me.

 

 

 

In practice it's really a minor trade-off I think. I don't hear the extra distortion at all with music with low bass.

 



Thanks for the reply jerg.



I'm in a dilemma here. I'm a little paranoid about dust protection, but at the same time I want the best attainable SQ. Damn dust. Things would me much simpler if there was no dust.

Well you can always do this:

 

1) Move the audio setup to its own room/chamber, that doesn't have any carpets/drapes/beds/clothing etc, and ideally no ventilation/leaky windows.

 

2) Buy an air purifier/active particle filter, and install it into that room.

 

3) Take a shower and get naked whenever you go into that room to listen to the headphones, you can bring in water and non-powdery food.

 

 

:)

post #1285 of 1702
Quote:
Originally Posted by jerg View Post
 

Well you can always do this:

 

1) Move the audio setup to its own room/chamber, that doesn't have any carpets/drapes/beds/clothing etc, and ideally no ventilation/leaky windows.

 

2) Buy an air purifier/active particle filter, and install it into that room.

 

3) Take a shower and get naked whenever you go into that room to listen to the headphones, you can bring in water and non-powdery food.

 

 

:)

 

LOL.

 

If you leave your headphones on a stand, or stands, when not listening, you can always cover them, going so far as use those hypoallergenic pillow covers.  I'm thinking a bag-shaped cover, preferably one with a drawstring.  Shouldn't be hard to find.  My HE-500s came with one.

 

And still get naked, if it feels right ;) 

post #1286 of 1702
Quote:
Originally Posted by jerg View Post

Yep and yep. 

I'm debating whether or not these thread loops should pass through everything (velour top, pleather, foam, vinyl undercover, dustscreen fabric) or just some of them. Passing through everything would increase the durability of the pinch in the long run, but it might pose comfort / earpad-washing problems.

Although probably not possible, it would be awesome if we could make the back thicker and fuller instead of making the front skinnier. Imagine the comfort of the alpha pads with the sonic signature of the jergpad.
post #1287 of 1702
Thread Starter 
Quote:
Originally Posted by kard16 View Post


Although probably not possible, it would be awesome if we could make the back thicker and fuller instead of making the front skinnier. Imagine the comfort of the alpha pads with the sonic signature of the jergpad.

Yeah that's way too much work, might as well just make completely new earpads. Who knows, perhaps even as we speak now, some Head-fi lurker modder extraordinaire is secretly crafting the ultimate earpads for HFM headphones.

post #1288 of 1702
Quote:
Originally Posted by jerg View Post

Yeah that's way too much work, might as well just make completely new earpads. Who knows, perhaps even as we speak now, some Head-fi lurker modder extraordinaire is secretly crafting the ultimate earpads for HFM headphones.

Perhaps in the future I'll try with the Lawton angle pads. From what I have read, they have a similar signature to the stock pleathers, so perhaps the same modifications would have a similar effect. It's one thing to risk $30 dollars in head pads to do a modification that's proven, but to risk a $99 pad on something unproven is risky. But I'm a risky guy, so who knows.
post #1289 of 1702
Thread Starter 
Quote:
Originally Posted by kard16 View Post


Perhaps in the future I'll try with the Lawton angle pads. From what I have read, they have a similar signature to the stock pleathers, so perhaps the same modifications would have a similar effect. It's one thing to risk $30 dollars in head pads to do a modification that's proven, but to risk a $99 pad on something unproven is risky. But I'm a risky guy, so who knows.

I think ideally for HE500, we'd want slanted earpads that are still relatively shallow (somewhat on the stock pleather's shallowness). Pretty much all brandname/aftermarket angled pads I've seen / tested are XBOX HUEG and thick.

post #1290 of 1702
Quote:
Originally Posted by jerg View Post

I think ideally for HE500, we'd want slanted earpads that are still relatively shallow (somewhat on the stock pleather's shallowness). Pretty much all brandname/aftermarket angled pads I've seen / tested are XBOX HUEG and thick.

Interesting, why do you think that? I think the stock are too close to the drivers where as the Alphas are too far. I think a centimeter or two thicker than the stock would be ideal. Physically, what would you think happens the further you get from the driver? It's still not far enough to attenuate the treble region. When I manually move the drivers away from my ear, I'm also breaking the seal between my head and the pad, so I don't think that's an accurate way to know what influence pad thickness would have.
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