I recently purchased this amp. I had an Infinity 1600a it was good. Was looking for more power options with ohm drops. Well i currently have this amp running a 4ohm load, like my old amp. Well this amp is killing the Infinity I had. I am pushing a louder volume with the gain set lower than the infinity, and also picking up notes of bass the 1600a was leaving out due to the non-adjustable subsonic filter. All in all, I couldnt be any happier. This amp runs cool even after hours of loud volume levels, is quite small, packs a mean punch and for the price, hard to beat! It has a fully adjustable subsonic filter, phase control, gain, bass boost and hz knob. Only complaint i have is i didn't receive a remote bass control for this amp, which i am in process of figuring out why. Audiobahn makes good products and OCS delivers! Superb bang for the buck!!!!!