Ok, I have been using some Kicker CVR 12" subs. They are in 2 seperate sealed boxes with about 1 cubic foot of air per box. The boxes are made of 1/4 masinate. I dont believe that this is a good combination. I would like a single box. But i dont know if i need sealed or ported. Also how much volume is right. I have seen Calculators but im too ignorant for that. Im looking for hard hitting Base with little distortion. I listen to older rock NEVER rap. Can any1 help me? thanks a bunch