[DavidA]

  Do you mean the front or back grill? I'm assuming the front.

Front grill, see picture:

 

 

 

[LHS]

  Front grill, see picture:

 

 

Ah I see, thanks. I did remember having to pull out a hair from it and it took some force, I'm wondering if some of it got left behind. Gonna try this tonight and report back. Appreciate it.

 

[520RanchBro]

Is there an aggregated list of HE-400 mods somewhere? I'm ready to regrill but also wanted to look more in to using sorbothane or wasn't there some mod using thin silk, remember seeing something about that.

 

[DavidA]

  Is there an aggregated list of HE-400 mods somewhere? I'm ready to regrill but also wanted to look more in to using sorbothane or wasn't there some mod using thin silk, remember seeing something about that.

There were a few that tried the sorbothane and I used the silk organza on the back side of the new grills to keep most dust and hair out.  You could also try dynamat in the cups.
 
As for a list of mods, the only one that I've seen is the HE-500 mods and the HE-560 mods

 

[Oregonian]

  Is there an aggregated list of HE-400 mods somewhere? I'm ready to regrill but also wanted to look more in to using sorbothane or wasn't there some mod using thin silk, remember seeing something about that.

Here's a list of a few -
 
Open grill mod
Vegan pads
Lohb suspension headband pad
Blutack mod (remove driver, put thin layer of blutack around it to seal the driver for improved bass)
Sorbothane
Felt mod for the Vegan pads to reduce reflections
 
Same mods apply to the HE-500 and HE-6

 

[MrMateoHead]

 
Here's a list of a few -
 
Open grill mod
Vegan pads
Lohb suspension headband pad
Blutack mod (remove driver, put thin layer of blutack around it to seal the driver for improved bass)
Sorbothane
Felt mod for the Vegan pads to reduce reflections
 
Same mods apply to the HE-500 and HE-6

Add the Pleather pad mod (Jergpad) for those who want an improvement but also to save money.
Velour pad swap counts as a mod to me

I am 99% sure the open grill mod is completely useless - unless you like the look.
Blu-Tak mod is interesting - does that stuff come off easily?

 

[Oregonian]

 
Add the Pleather pad mod (Jergpad) for those who want an improvement but also to save money.
Velour pad swap counts as a mod to me

I am 99% sure the open grill mod is completely useless - unless you like the look.
Blu-Tak mod is interesting - does that stuff come off easily?

Blutack is easily removed, yes.
 
Open grill mod - did an A/B on my HE-6 and HE-400 before I removed the grill and much prefer the sound.  Not useless to most who have tried it. 

 

[The Third]

When one inspects the diaphragm of a second hand pair of one of these planar headphones, what does one need to watch out for. I just took of the ear-pads on mine, and notice very slight ripples here and there on the diaphragm. How tight and flat is the diaphragm supposed to look like inside the headphone?

 

[DavidA]

  When one inspects the diaphragm of a second hand pair of one of these planar headphones, what does one need to watch out for. I just took of the ear-pads on mine, and notice very slight ripples here and there on the diaphragm. How tight and flat is the diaphragm supposed to look like inside the headphone?

Mine are flat with no ripples that I can see:

 

[john57]

Ripples on a diaphragm might indicate that the headphones may have been over-driven.  Need more study on this. My two pairs of  HiFiman headphones looks good on this front.

 

[The Third]

Mine are flat with no ripples that I can see:

Thanks for taking a pic. On first glance mine look flat as well but around the yellow connector(clip thats holding it in place) are slight ripples. The overall diaphragm looks flat but when I shine a flashlight on it I do see ever so slight ripples here and there. Also, do we have the Rev.4 edition?

 

[DavidA]

 Thanks for taking a pic. On first glance mine look flat as well but around the yellow connector(clip thats holding it in place) are slight ripples. The overall diaphragm looks flat but when I shine a flashlight on it I do see ever so slight ripples here and there. Also, do we have the Rev.4 edition?

I don't think its anything to worry about, my HE-400i and HE-560 have very fine ripples also.
 
Mine is a Rev 4 and yours looks the same

 

[The Third]

I don't think its anything to worry about, my HE-400i and HE-560 have very fine ripples also.

Mine is a Rev 4 and yours looks the same

Yea I don't suspect the micro ripples to be problematic as the HE-400 is just a beast of a headphone. They sound like engame(fun) cans to me. Is your HE-560 an end game analyctical(balanced) headphone to you?

 

[DavidA]

The HE-560 is not end game and I don't think I would call any headphone end game except for maybe Sennheiser Orpheus HE 1060.  I like many different headphones for their own unique sound signature.  If you check my profile you can see what I currently have

 

[The Third]

  The HE-560 is not end game and I don't think I would call any headphone end game except for maybe Sennheiser Orpheus HE 1060.  I like many different headphones for their own unique sound signature.  If you check my profile you can see what I currently have

Hey DavidA, we talked before remember (few pages back). Yes that's what makes this headphone hobby so great, because
each headphone has such a distinct personality. My most balanced headphone so far I believe is the DT770 600ohm premium.
But now I am searching for an open balanced headphone so that airy treble will be present. 
I am already happy with my HE-400, HD-598 and Fostex X00's being the fun cans.
Seems like the HE-560 and HD-600 both seem like solid options that could fill that open & balanced headphone gap. 
 
Now one is an orthodynamic and the other a dynamic.
I like both sound  styles equally, with the ortho being slightly more addictive, and the dynamic slightly more natural.
Since you own both, what would you recommend getting first and why?