I had 2sx 12's running off of the hifon 2608 at 1 ohm and they where fine but I'm now runnin 1 15sx off an ap 1500 right now and its about to blow but I believe because my box is to large and couple yrs ago I had 2sx 12's runnin off of a solid audio 2500.d modified and them bitches gave me no problems but I had good electrical.