Okay, i'm re-buidling my boxes and there's chances that i may be taking/switching some subs around. Will i want to build one box? or two? i think the two would be nice so i could take out a sub if need be i was told by someone that it'll cancel my airwaves and lose SPL and SQ and stuff if i build two seperate ones instead of one because the dimensions will be off. whats ur guy's thoughts??