**** lol i just watched this video where the guy tested a bunch of headphones and he tested the ultrasone 900's and they were not flat at all...im wondering if the 750 would be the same.
this guy seemed to like the denon d2000's and the shure 840's
now im considering the d2000's again or the shure 940's lol...**** me im driving myself bonkers. YouTube - ‪Dave Rat - The Mighty Headphone Quest Part 1‬‏
you have to search for part 5 for the last vid. and he has more testing that can be found if you google it.