I'm just wondering if it's vented on the cups or not, I see that "grille" on the backside looks suspicious. I'm just wondering how the soundstage and isolation are on these, I do tend to prefer semi-closed designs as pretty much all headphones whit this design have brought improvement to soundstage and bass response in my ears over a fully closed design so if it's semi-closed it's probably a bigger chance that I will like them than if it would be fully closed.
There's this high res picture on M-Audio's site but it's kind of hard to tell if it's fabric behind the grill or not (click to zoom in) http://www.m-audio.com/images/global/media_hqpics/SP_Q_40-side.jpg
Edited by RPGWiZaRD - 11/2/11 at 3:48pm








With sealed backings and comfortable ear cups that completely surround the ears, the Studiophile Q40 headphones deliver excellent sonic isolation for accurate monitoring. You’ll hear more detail at lower volumes, so you can protect your hearing while tracking, mixing or listening in any noisy environment. In addition, the Q40 headphones afford privacy when working in a shared space.