you don't have to give the subs rated power, and you can underpower them too and they'll still sound good and be decently loud. shit, right now i have my old 12" ssd seeing 25w rms. hahaha, took out my 6.5" mid from my computer's 7.1 surround sound system and hooked up the ssd and its only rated at 24w or something like that, but the internal amp is like 4ohm stable hahaha and my ssd is dual 1ohm coils. it sounds pretty loud and it shakes a few things in the house with such little power. i heard from a buddy of mine, that a person he knows, might want to buy my 18" btl, and if i sell it, im not too sure what to get. i'd love to get like 2 12"s or something, just not sure what to get though.