Did the KH directly compared with Beyerdynamic T5P, T51P and Sennheiser Momentum (on ear). Processing and packaging of the Ultrasone were excellent by the way, what is indeed expected in this price range, but still finds.
Sonically the KH is an all-rounder, with crystal-clear highs, very clear midrange and coupled with deep bass, but not booming. The S-Logic technology produces a sound sensation that seemingly builds up outside the head, a pleasant contrast to what we experienced with earphones. The sound is very good "durchörbar" and very plastic. In music such as Pink Floyd "Us and Them" the bass without EQ but drowned out some of the midrange and treble. But you can quickly become accustomed to this sound - and at the Classic is even better - but it's not quite what I would prefer for this genre.
Compared with the Beyerdynamic T5p the sound was more balanced, stronger in the bass and not so tiring, which is T5P downright painful for my taste in the mids and highs - and I am over 50 and should therefore no longer even so perceive the heights like a 20 years. It's just important that you test the KH with the preferred music and the intended playback device.
The Sennheiser Momentum afforded a remarkable good result from - rich bass, treble, and good spatial reproduction - especially since it was by far the most affordable headset in this comparison. The T51P sounds much warmer in direct comparison, but the whole thing is really taste Zache. From the outer appearance, he is much more attractive than the more expensive by 80 T51P.
I would recommend the Ultrasone music connoisseurs who listen to a lot of classical music, the momentum for budget-conscious connoisseurs, and the T51P for those who primarily want to use mobile and the iPod to KH and warm, prefer deep bass.