The bass and the heights sound way too loud. Which I guess was on purpose for dj-usage.
But if you use a proper equalizer, that problem can be easily sorted out.
I imagined the sound far worse and was positively surprised.
Compared to the Sennheiser HD25, the headphones seem way better processed, and long listening sessions are no problem for the ATH-PRO5 X.
You get comfortable, nice surround sounding-alike headphones.