Hey all! I currently purchased 2 soundstream spl 160 15's that are going in a 2-dr cavalier 99'.They recommend 1.5cf sealed per sub for high spl,but they also recommend 2.0cf sealed per sub as well.Both 15's are dual 2ohm and will see 500rms ea.What would give me more spl,1.5cf or 2.0 cf per sub seald? I wanted to do ported but that requires more room than the cavy can handle in a trunk.(3.25 cf per sub ported) Any Ideas??