i'm running 2 kicker L7s with a ZX1000 amp...it pounds...depends what u man man, honestly i dont recomment the round kicker speakers, i've HEARD alot of bad about them. as for the SX, good choice, i wanted the sx1250 but i settled for the zx1000 cause of money purposes...i'll eventually upgrade to the Solo-X speakers...if they'll fit, lol