Actually nevermind, I probably over-reacted. After giving fedex hell, they made their delivery guy doublecheck his route. He gave my package to the wrong people a few blocks away. I got it back. It was opened, but oh well, don't seem to be anything missing. Anyway, the ifi ican was a great suggestion. The bass did not clip anymore, even at high listening volumes. Love that 3d switch, it really does get rid of that 'cave' sound inherent to headphones. The music is out of my head, and it is improved with the grill mod.
The he-400 would be absolutely perfect now if only the upper mids weren't so recessed, and the treble spike broken off.
Edit: Holy crap these put out a lot of bass, when boosted. With this new relevation, my new estimates on bass power is this: Now my jh16's are only 3-5x more powerful. Both are clean as a whistle without that boost though.
Great, swinging more towards this amp now even more now.
Pity it did not have a balanced design as well like RSA/PB2....but they are $350-$500+