Ok first off I already have a box built and installed in my Charger and here is a video of it: current box
The box is 31.5"w x 14.25"h x 22"d, 4 cubes after displacements, 6" aero thru rear deck tuned 32-33Hz. Now I'm thinking about building another box with a slot or square port down the center on the same plane as the 12s firing into the cabin. The 12s are Obsidian Audio and running them off a Crescendo 3kwp. I would like to get the most out of this setup, but Im not chasing numbers. I just want a loud to the ear daily setup. The setup I currently have sounds good but I think I could get more out of it. Im restricted on the height and width of the box but I have a few more inches in depth that I could use. So should I go with more or less box volume? I know subs can handle more power in smaller boxes so what do you all think I should do?