I traded everything i had about 6 months ago, well, guy gave me good deal on getting all back and some new stuff he just bought. Anyway its 2 BL 18s, and 2 sundown 1500ds strapped. I had subs up, port back, 20 cubes before port and subs tuned to 33hz. It sounded great and definitely had the lows. box before was this:

then i had new design done for wall behind front seats, same tuning, and specs, both boxes with 200+ square inches of port, wall box:

Both boxes designed by chris at fishercustoms. I never use backseat anyway, but not sure if will make big difference as in louder if i go with a wall. any suggestions? or just go back how it was?

Should be louder, since it would have to feel less space I would assume.

i thought the same if i can make panels and seal it off from the back, i think that i am goin to go with the wall option