What kind of truck do you have? I may have a box that will help you. I custom built it for a friend that had a 2000 f-150 ext cab. It replaces the bottom half of the backseat and holds 2 12's down firing. It pounds incredibly hard, and its sealed. He got a new truck and he bought a box off ebay so this things just sitting here collecting dust. It has a gray cushioned top with 3" of padding but I didn't get any pictures of it. It doesn't leave much room behind the backseats, but enough for a little kid.