So Im waiting for my 15 X.X.X to arrive. I planned on getting a box made from a good local company. I decided to call another one just to see what they had to say. He told me I should be firing the sub down because Too much bass is lost in a Jeep Wranglers Cabin. Hmm.. This is my first system so Im not sure. Plus the 15 wont fit firing down. Is he right? Or will it really make a difference. I mean the sub would be firing towards the rear with the tailgate right there. I would think that would be good.