for those of u guys who mounted your amps on the back wall behind the seat, what type of screw did u use to screw it into the wall? I screwed it in and now it sounds like it scraps against the outside and makes a squelling noise everytime I hit a bump. I have a 2005 f150 fx4.

 

mount a piece of mdf to your back wall, then mount the amp to that.

 

thats what i did