Complete disappointment. Better sound than the foam that came with my K800i, but that's not saying much. Flat and boring sound that makes no satisfied. Engaged my Creative in-earlurar which cost around 400 - in the adapter and I can say that it is an incomparable difference! If you want great sound and have a couple of 3.5mm at home, you can buy these, just to throw the headphones (save the rubber, it's convenient), and plug your own. Otherwise, advise me and the strongest.