I just ordered a cpl 15 Re sxx and I am trying to figure out how I should place my box...I figured up specs i needed to using torres calculator and basically i'm making a square that is like 21.25Hx37.25Wx22.5 D i'm using 2 round ports 5" diameter and 7" length so the net volume is 8 cubic foot which is optimal for the subs and the ports make it tuned to 32.84hz and recomended is 34hz....should I face my subs and ports up towards ceiling or should i face subs and ports towards tailgate? there is only gonna like a 6" space between the box and tailgate...or any other ideas or box plans would be greatly appreciated if someone has something better..thanks