I'll give that a try. I'll see how closing them up and adding cotton mixes with damping the back of the cups with felt.
I sometimes don't like how much they leak :/
Wanna share something with you guys. I tried recabling those the other day, I didn't like the stock cable. I wanted something stronger, more substantial. So I recabled directly to the drivers, + to + and - to - for each channel. Nice DIY cable! but...
It sounded horrible, and I hadn't reversed the wiring. Apart from sounding thin, there was a noticeable lack of soundstage right in front of my head... something was really wrong. Thankfully I had taken pictures of the stock wiring job inside the phones... To my surprise, after studying the wiring... There's some signal mixing going on here. Some form of crossfeed if I'm not mistaken? Sorry for the picture quality, I only had my phone when I took these.
Left driver
http://www.imagebam.com/image/9b6f8c160617225
Right driver
http://www.imagebam.com/image/8dfeca160617217
Ground from the TRS jack (blue) goes to the left driver's ground. Left signal (gold) from the TRS jack goes to the left driver's + pad.
Right signal wire (red) is soldered to a solder pad not connected to anything, it's just there for an easy and safe way of connecting that to the right driver + pad, through the internal wire.
Now, right "ground" (Gold) is connected to left signal + (gold) pad in the left driver :/
Soldered this way it sounds the way we all love and appreciate, with a full 300° soundstage. Not as open and detailed as other cans, yeah, but quite circular nonetheless. Solder the signal wires the usual way, and you get a weird sound, broken up soundstage... they sound like rubbish. I decided to keep the stock cable after this. If you ever recable those, keep in mind how they're wired from factory, don't try to do it the usual way.