I had 2 MMATS competition amps hooked up to 1 15" Trio competition sub. The sub weighed like 60-70lbs, had triple stacked magnets. I was playing a test cd that had all kinds of different frequencies and different songs. It also had the part from Jurassic Park where the T-Rex is stomping down the road and then roars real loud. Well, that was the shit that blew my sub. I ended up selling the one amp after that, and I still have the other one, but it's stuck in protect mode. I still have a Cerwin Vega 15" Stroker, and a box, so hopefully I'll get some money to hook it up.