I have a 2005 pontiac grand am with 2 12 inch subs in the trunk. When the subs hit the pressure in the trunk is making the back speakers flex way tomuch and they will eventually probably rip as a result. I know that they sell speaker baffels to put over the back of them but i dont think they will hold up because they are only foam. I have heard to fold my back seats down but they dont fold down. Is there some kind of box i can buy to isolate them from the trunk? I have in the mean time faded my music to the front speakers but it does not sound as good. I dont mind if it will decrease the performance or bass response from the back speakers as I have the subs formy bass. They are stock 6×9′s.