Bass, midrange and treble with an effective separation of precise instruments and audible in all conditions (even urban transport!). More than a helmet, real miniature speakers stuck to the ears. No review. Ensuring the quality of the mix of the songs you listen because the Koss restores the quality but also the defects that may exist on some recordings (especially MP3). That's the "high-fidelity" ... I use on my iPhone, and Apple is expected to sign a partnership with Koss, at least take inspiration from the brand of technology (exit definitively the original Apple headphones !). Of course, there are helmets like Monster Beat (300 euros at least). The Koss, ten times cheaper, however, is not ten times worse than the concept "by Dr. Dre" ...
