Had a friend who had these come over to test them out, compare them to my ATH M50's. Plugged into a Fiio E7, these headphones were nothing short of great for their price range. From what I can remember, they sound better than my old JVC HAM750's. The bass response on these is almost as good as the ATH M50's. Not as crisp, but the thumping sub-bass is definitely there. On high/mid bass it loses quite a bit of sound but it's generally very good. It would be great for rap, where the thumpy bass defines the song, as opposed to say dubstep where mid bass lines are crucial.
The mids are still there but are not as pronounced. Nothing really to say.
The highs are where this headphone definitely suffers. The highs are very recessed and almost unclear. They seem so distant and in the background compared to everything else.
The build quality...they are apparently solid but look kinda cheap. The pads and the headband are all plastic. So that's that.
But overall, it's a great buy. SQ for this low of a price is a steal. They honestly compare favorably to beats.