I have about 14 cubes, net, to build a box in my newly acquired 2 door jeep cherokee, I can get more if needed. Was going to do a 4th for my 15" eclipse ti, mostly want to try and build one and see how they sound. I was wondering if I should point my port up or forward? Forward it would fire into the rear seat, which I can fold down at times. What say you oh box whisperers?