hmmm so..... ok i have 2 18 fi btl fully loaded whats the min. distance i should have the sub from the back of the box. the reason i ask is because im building a wall in my 04 blazer and the back window curves and its like 12-15in at the top and works its way to 28in at the tail gate. k i know this is in the wrong section if i ask this but would it be better if the subs were at the top and the port bottom or the opposite?