I was thinking of cutting my sub into my back seat, firing it straight into the cabin, my back seat does not fold down, and has a metal support. I figured I could either 1 reinforce it with mdf, and build the rest of the box around that, or just use the metal but I'm sure that would rattle like a mofo, so pretty sure that idea is out. First question is, would this be an insanely crazy idea to take on as far as difficulty? This is my first try at a ported box. Second, would you cut the port to fire through the seat, or up through the back deck (where the 6x9's are supposed to mount), I was figuring on doing a slot port, but if I can get the stuff I'll go ahead with an aero port, but I haven't been able to find the size I need yet.
If it helps any this will be done with a 15, in a 96 grand am 4 door, I figure if I could do this the seat wouldn't eat up so much of the sound coming from the trunk, and it would look pretty damn cool.