Pros: neutral but good impact in the bass, tights bass, price,great for gaming, design.
Cons: it needs a good synergy
this is my first "serious" pair of headphones So the review cant be very full, but I try to give the possible useful information. I was looking for a pair of headphones with a neutral sound but with a good bass impact and suitable for gaming, and i am very satisfied with them. they do very well with all my music: particularly they are fantastic with black eyed peas and alicia keys ( quality of bass and voices is fantastic !) . i think they do very well with hip hop too, but maybe some song ( for example Eminem marshall mather lp2 ) would benefit from a little more bass (but really very little).. k612 has a very good imaging !! when i play FPS games , the position of enemy are very precise!
however they need a good sinergy .. i tried them on a fiio e10 and on another soundcard of my friend, and k612 was lean in the bass and lack of detail...
but with my EF2A they are special!! more punch in the bass, more details, more clean, bigger stage.
i dont know if it depends by quality or power of amp but they are special with EF2A and they sound more better with a good dac ( dac of matherboard are not suitable) .
very raccomanded !!also for the price : i paied them 135€(shipped) and in the forums they are compared with headphones much more expensive ( sennheiser hd600 for example).