I have a really freaking heavy sub sitting in the middle of the trunk liner in my car. I used industrial stength velcro to keep it from sliding around. The problem now is that the flooring in the trunk has completely sunk in the middle and now rests on the spare tire underneath. I want to replace it, but with something stronger that will support the weight of the subwoofer. Do you guys have any ideas on something that might work? A friend suggested plywood, but it is super heavy.

 

1/4 " MDF