i've got a 15" soundstream turantula sub, top of the range rated 1000W and im only using a 5 channel soundstream turantula, but only giving the sub 450w and i manage to pull out 151 DB's. I say if you dont intended to use the other two channel than dont get the KAC-7252. If i were you i'll look for som other brand that gives you more power rating. Try eclipse, or even boston. the mid-range soundstream amps are not bad either