In general, not bad headphones, well-assembled, the sound is good average . The bass seems to be there, but the JBL QUANTUM 400 for 5k is more saturated (maybe the merit of the wire, of course) is definitely not worth the money! for 7-8k the price would cover all the shortcomings! I put C grade purely because of the price, because except for the fact that there are no bright + wires in them anymore