HD600, HD650 Foam Mod
Apr 27, 2007 at 3:34 PM Thread Starter Post #1 of 12

OwlAudio

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It seems to me that the foam sheet that covers the driver is pretty thick and could be replaced with a thinner more acoustcally transparent material. Has anyone tried this and where can one find such a material. Basically this material is just functioning as a dust cover for the driver.
 
Apr 27, 2007 at 3:45 PM Post #2 of 12
Sennheiser put that foam there for a reason. Some people seem to prefer it out, or replaced with tights though.
 
Apr 27, 2007 at 3:52 PM Post #3 of 12
Quote:

Originally Posted by OwlAudio /img/forum/go_quote.gif
It seems to me that the foam sheet that covers the driver is pretty thick and could be replaced with a thinner more acoustcally transparent material. Has anyone tried this and where can one find such a material. Basically this material is just functioning as a dust cover for the driver.


There are extensive discussions of removing / replacing the foam - it makes a huge improvement.

Just do a search...
 
Apr 27, 2007 at 8:35 PM Post #8 of 12
Quote:

Originally Posted by Gradofan2 /img/forum/go_quote.gif
There are extensive discussions of removing / replacing the foam - it makes a huge improvement.

Just do a search...



I don't think it necessary has to be an improvement, to my ears it takes away that warm powerfull sound, that I think is the 650s best area, I think they sound strange when the foam is gone.

I think it is obvious that the thick foam is there to give them the traditional senn sound.
 
Apr 27, 2007 at 11:15 PM Post #9 of 12
removing the foam makes the highs shrill and muddies/smears the sound. a bad mod in my opinion. replacing it with thinner material, i have yet to try.
 
Apr 28, 2007 at 1:19 AM Post #11 of 12
Quote:

Originally Posted by Illah /img/forum/go_quote.gif
I tried this mod for a period of a month or two...but eventually went back. You can't say I didn't give it a chance! Overall it took some of the warmth out of the sound and that's a big reason why I like Senns.

--Illah



completely agree. they just don't sound like REAL senns. all those fakes out there without foam
very_evil_smiley.gif
 
Apr 28, 2007 at 1:24 AM Post #12 of 12
Quote:

Originally Posted by vcoheda /img/forum/go_quote.gif
removing the foam makes the highs shrill and muddies/smears the sound. a bad mod in my opinion. replacing it with thinner material, i have yet to try.


My experience was the same, so I went the other way and replaced the foam with a similar density foam, but about twice as thick. That muffled the treble too much, so I used a penny and cut around it to form a hole in the center.
This mod actually sounds pretty good. While it does recess the midrange a bit, the whole sound signature takes on a more lush character that is great with rock.
 

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