before ordering, I had read the XBA-C10 test on August 19, 2013 [...] which gave an excellent response curve (lower midrange a slight excess, acute slightly behind). But the helmet received XBA-C10B.AE is entirely done the opposite: no bass, too much treble. On a PC, adjusting the bass and treble +12 dB to -8 dB, the sound is good, but on a tablet that are usually without tone adjustment, the sound is rubbish, ears whistle after a few minutes. It is the worst headphones I could buy. I asked to return to Amazon
