So this is my first post here but have been a long time member. I have been inputting numbers between a lot of the box design programs and they all yield different results. I cant seem to lock down any final results to go ahead and build my box. Can anyone lend me a hand with a proper design? I'd rather not build to my current "guesses" and have to change things later. I have a 2004 Chrysler Sebring sedan with a Js 300amp alt, big 4 upgrade, 1 run 1/0 front to back (+and -), 3 xs power xp3000s, 2 sundown zv5 12 d2's and a Ns 1 to power them. My maximum trunk space is 36w x 15h x 36d. I would like to go all 36 wide and 15 high, the depth does not matter. Batts with be in the spare tire well. Any help is appreciated.