This amp is pretty good for only $20.00 USD, don't expect sound quality enhancement because it's only an amp. It drives my Sennheiser Hd-201's pretty well and even my Stereo system (Venturer STS-20)

I bought these with the intention of replacing my Plantronics Gamecom 367 closed ear gaming headset and they are doing an excellent job thus far. They sound great (need a headphone amp btw if you dont have a decent audio source).