But not so much treble, but not bass-heavy - the sound is - unlike earlier partly in SONY. The sound seems genuine, clear and very pleasant. Even at full volume, the headphones are very clear, bring a pleasant sound and roar barely. A treat for the ears. Other headphones do quickly hurt in the ears or trigger an annoying post-fiepsen - they do not!
The sound insulation works (course only in conjunction with an XPERIA Z2 / Z3) very well and looks unique.
Conclusion: strong buy recommendation! Beautiful, clear sound with NoiseCancelling