hi there, I've found 2 things to change the sound of my DT770 : 1)dampen the cups to kill the plastic resonances 2)angle the drivers to give a 180º headstage(a la cd3k) I've done and undone the first part...and I think it's a mixed bag on the DT770/Pro, it was no match as it's using low quality plastic..that simply sounds terrible! but the DT770/Premium uses ABS cups, which is also used for music instruments(clarinets, etc). it does kill the resonances, you get the same sort of sound as if you were in a studio cabin w/ these things on the walls : it gave a highly claustrophobic and a much drier/percussive sound...and when I took it off months later, it gave more of a room speakers ambience(especially w/ some very slight crossfeed in foobar). so I'm just wondering what kind of sound I wanna get from my headphones at this point....speakers in a resonating home room, or resonance-free like in a studio cabin? I guess I'll try to dampen them again...if anyone wanna share some thoughts. I have to admit that I love the studio cabin feeling, but it sounds less natural...and possibly less appealing/more fatiguing in the long run?