Ive used memphis in all my rides (at least 7 full systems) and am always going to stick with it. Used their door speaks off head units power, sound awesome. used them off a 4ch amp, sound 2x awesome. Their subs have always been really good priced, and their amps are insane. plus i know at least the shop i use they have a no questions asked lifetime warranty on amps/subs. ive blown several and had it replaced same day