This sub is crazy!!! i have 2 in the Sonic Sub Box: 2SV10 and they freaking BUMP! i have an SSL CR4000.1 amp driving these two bad boys and it works perfect! I have the loudest system in my whole school. I'm out bumping 12'' subs left and right including Alpine type Rs! Amazing subs! Not only can they beat the hell outta your car and the car next to you. But the sound quality is superb for even jazz. Alpine never fails to surprise. These are probably some of the best subs for your money. I strongly recommend them to anyone.