maybe one sub...hmm maybe i can give it a shot... sell ALL my equipment my 2 15" memphis hpos with sealed box $300 my planet audio vx1400d about $300 that would be $600 umm the big question is...would i be happy with a single sub in a ported box? would it be louder???? im thinking of upgrading to the planetaudio vx2200d its abut $420.. so what 15" sub would you recommend?