I have 2 15" AB HD's in a 8cubft box in the back of my blazer with the slot port facing up and the subs inverted and me and my buddy DAN have been arguing, he thinks i should put the subs non-inverted and turn the box so the port is facing the hatch, he thinks i will get one or two DB's by doing this so i figured i would ask my SMD family what they think...........WELL??????