So get with the KH look at the output of my PC sound card and at what is able to do as a parametric equalizer ... The emphasis on the bass turned then surprisingly but when not so bad out. The deep bass range could stay just the "Fidelio X1" even theoretically, the real problems, the headphones then shown in a different frequency range: raising the lower frequencies runs up in the low midrange, where the "X1" then again a special increase anywhere from 1 to 2 kHz has. What one needs, or what kind of music is so much more, I can not imagine the best of intentions. One result is excessive heat, an unnatural reproduction especially of votes and a frequency response that is anything but neutral. So after then said over stressed areas slightly lowered and the presence area raised slightly to 5 kHz, the headset even made quite a lot of fun. Heights looked silky and precise, individual instruments were spatially separated wonderfully forth thereby swept details that make the headphones for analytic listening, at least to some extent recommended. He also did not seem so dry analytically as the AKG 701, I by the way, like the little brother AKG 601 feel absolutely terrible for pop and rock music. Similar to the Beyerdynamic DT-990 remained at X1 by defusing the bass range unnatural discoloration of the centers that has unfortunately nothing more for me to do with listening.
Well, sound is after all a very subjective thing. Especially when compared to the older (and unfortunately no longer available) Philips models "SHP 8900" and "9000 SHP" and my 15 year old Sony "MDR-CD270" the midrange has been pretty messed up when "X1". Electronic music and other bass heavy stuff and also for classical I can the "Fidelio X1" even imagine quite well, for my purposes, however, it remains unfortunately useless.