So the box and Power supply are everything. I would love a great balance between SPL and SQ, could I build one box for SPL and the other for SQ? Or would that just sound terrible? Should I just stick with finding a good balance? And yes I was thinking the dual 2 of the FI's. I'm gonna get the 15's, since they're going in a cab cutout from the bed box I've got plenty of room. New question, if someone could explain it real well or have a link that does. On bandpass boxes, would that be a great way to combine SPL and SQ? and is it a Sealed whole volume plus Ported whole volume or half of the ported volume plus half the sealed volume? The hair tricks would be funny to do to people but like a couple of y'all said, it sounds to distorted for my taste.