The sound quality is much compared to my Sennheiser PX200: clear and enveloping bass, although this sharp and clear midrange. The sound curve is very broad and flat thanks to 3 transducers with only a slight bass boost to provide a little more "safe" music. The sound performance amounted to 107dB / mW. The problem with this headset is that it becomes fussy about the quality of the sound source as it transcribes all possible defects. By cons, it also has the advantage of no longer use the equalizer settings to find a cleaner sound. Although this is an in-ear headphones, so be careful with sizes of ear plugs. This can also mean that it will not suit everyone! I am very satisfied with my purchase!