Curious if anyone has successfully stuffed some subwoofer(s) behind the seats & if so if you could send me the dimensions so i know what to work wif.
Depends on what seat you have. I had a image dynamics IDQ 10 behind my passenger side bucket seat in just a normal wedge truck box and it fit fine but if it was the stock bench, no way would it fit.
also depends on how far back you scoot the seats. I'm an average height guy so a lot of regular cabs are almost at the limit of legroom for me. If you take the front of the seat bottom and raise it up to support your legs, you can scoot the seat forward more and lean the seat back more, giving you more wedge behind the seats. It sorta feels like the oldschool Pantera seats. Very comfy, too It cost me about $15 to do this, using 100 washers from home depot. (50 per seat, 25 per front seat rail bolt) Now I have a 1.5 cu. ft. box behind the seats with a fullsize 12".