i had 2 10" subs in a fiberglass enclosure under my backseats. it sounded awesome!! i had 600RMS pumping into my subs. maybe thats why they sounded so nice and throaty.

 

I found these guys http://www.sonicelectronix.com/item_...CDOG03-10.htmlabout a year ago. I have bought several audio products from them. They are ususually very competitive, especially with crutchfield. The link is for a double 10" sub box for the quad cab. Hope it helps.

 

i had a wedge pro box behind my back seat of my 05 single cab with one 12" d3 diamond sub, i now have a 07 with 2 jbl 12's and it is sick, the only thing that sounds a little bad it the seat vibrating but i would recomend going under the seat so you don't have a big box taking up room on your back seat.