Appreciate the knowledge and again I was trying to explain Broadly... which means there are tons of other factors and exceptions. On the same note, if you take two run of the mill subs, same brand, one 8" and one 15" (say MTX sub), hook them to same amp, using same style box, theoretically, the 15" sub will produce and perform better than the 8", on the lower bass note frequencies... to an extent... (THIS IS HYPOTHETICAL, AS WE ALL KNOW THERE ARE A BAZILLION FACTORS THAT CAUSE DEVIATION IN MY STATEMENT)