idunno i think its this amp more than anything, my friend has TWO 1200w ma audio amps and they slammed these subs hard at all times, the gains were set on full on the amps and around 0 on the hu, he had them for about 6months at full blast, it never hurt them at all, im talking Alpine type r's 300w rms subs in a sealed box getting that much power not even effecting them, but im sure the amps werent giveing the full 1200w like there rated.... but they slamed them hard, made one fall apart... didnt fry anything... the subs never smelt bad at all, with my amp the subs smell like shit some times, thats when i kno to turn it down but they slam just as hard as his...?