Tried this mod with bunched up saran wrap instead of cotton/gauze...sounds ghetto but it noticeably improves the soundstage AND isolation (sounds weird but its true), also makes them (barely) circumaural to me; for reference my ears are pretty average sized. Having something underneath the pads stretches them out, makes them more taut and makes the ear-space bigger. Also tightens up the bass a little, it feels punchier now. I really wish there was some way to mod the drivers to bring out the subbass...if I could magically improve extension on both ends and give the mids a little bit more of an aggressive feel, the MS400 would now be THE perfect headphone for me.
Also I'm curious if anyone might have ideas about how the sound would change by removing black fabric that covers the driver. Perhaps bring the highs forward? Any chance it would lessen the bass?
I think I also saw something once about puncturing the mesh that sits between the fabric and driver, you can see it when you remove the earpads, but I can't seem to find it now.
Edited by Gilly87 - 12/20/11 at 12:26pm