It's been a week since I bought this headphone, first for its price (49 euros).
I use it on my piano numrique to work quietly in the evening.
The sound, at first glance, seems good, mlais after one hour, you begin to have the head as a pastque.
I think the problem comes from saigus poorly balance, which twist the long ears.
Finally, I have to really put the volume to a minimum.

Next time, I would invest directly in a good headphone, even for the COST audio.