I want to build a bp box for 8 rf p3 tens, it can b one box with 8 in it or 2 boxes with 4 in them.They will be in a wall for a dodge durango right behind drivers and pass.seats Dont care bout how it sounds 4 as sq. I want to be really loud to compete in spl contests can anyone help please? not a daily driver jus want to be loud on termlab meter.thanx