The perfect fit and the perfect sound all in 1 perfect package, the Q Power Dual 12 Inch Subwoofer Box for 2004 2008 F 150 X Cab & Super Crew is here to take your car audio to new heights. The underseat downfiring subwoofer enclosure includes 2 ports for 12 inch subwoofers. Constructed with high quality spring loaded terminals, high grade 0.75 inch MDF, and durable bed liner, this box will keep your subwoofers protected so they deliver audio perfection non stop. Measuring approximately 52 x 16 x 9 inches with a mounting depth of 4.5 inches and 0.7 cubic feet of air space per sub, this box is designed to fit under the seat of Ford 1 50 X cab and Super Crew cabs (2004 2008).