I've been searching all day here and not having much luck. I was hoping someone could show me some pics and maybe some dimensions on home made boxes behind the seats on a regular cab truck.

 

these are the only two pics i have on my comp, i can get some more and some measurements if youd like.

but to keep the right amount of airspace i had to trim about 3 inches off each side of the plastic trim on the back wall

 

dont have the dimensions anymore, but you can get an idea of a different type of design. two seperately sealed 12"s

heres another

 

Those look really good guys

 

Anybody else?