Well, I tried the mod by curiosity.
Overall, I like better the result, but not everything.
What seems obvious first is that I got "more bass".
But then I found the soundstage a bit "weird". It was hard to pinpoint why.
I thought first that some reverb was introduced inside cups, but that was not obvious.
Then I realized that the whole frequency range sounded more detailed and refined.
So that's not "reverb" inside cups , a reverb would introduce a kind of "veil" , but here the sound just seemed overall cleaner.
Perhaps there's a problem with "imaging". As if left & right sound became a bit independent, and that the stereo effect failed sometimes at providing a "focused" image.
Also, the bass is more forward. I'm sure lot of people would love this kind of bass, but I prefer to be it more laid back.
About comfort : it's softer near ears, but the clamping force is more important. A guy already managed to break the extenders of the srh940, so I think , more clamping force increase risks of breaking.
Regarding your idea of putting cotton, someone once got a similar idea. The other idea was to put cotton behind the ear, but I found that was not convenient.
See the thread "Found an interesting way to improve bass for Shure SRH940". There's also the "baka mod", this time you put putty, inside cup.
If someone could suggest a better idea than putting cotton balls or "folded electric tapes" inside pads , that would be nice. I'd like something more neat.
Edited by extrabigmehdi - 1/19/12 at 7:16pm