Let's see those sound systems
Reply #5 –
Are you using 8's 10s or 12s? The only reason I had to slope it like that was because I wanted the 12's pointed somewhat into the back seat. You should have 12 inches of clearance from the the trunk floor to the tensioners, and if you go with 10" speakers, you can just build/buy a rectangular box for them. As for the dimensions, I could measure the outside of the box, but you would have to do all the subtracting for the thickness of material, and the slope uses some interesting angles.
Sorry, I am unfamiliar with the 808's.