I feel these need alot of juice. Amped they sound totally different with much more detail (and bass). I wouldn't recommend them unamped.
100 hours on mines already and the micro-detail is just crazy. The only issue is that bass tamed out alot. They no longer have that thunderous bass of the beginning. It's much more controled and it's a good thing, but I miss the bass, they sound lean compared to my other bass heavy headphones, which is making me think about letting them go for someone else that is not a basshead.
Edited by dimitri42 - 1/13/13 at 2:27am