I want to build a speaker box for my car that goes in the hatch area and basically just raises the floor, it would be just tall enough to set two 12's in. Then I would box in the recommended area for each sub and use the rest of the area to mount the amp or for storage. Then the subs would be facing straight upwards and I don't know how that would sound. I would then but the carpet on top of the box, my goal is to keep the hatch area looking stock. Has anyone ever done this? Or do you thing that it would work?