Q Power GMC/AVALANCHE10 DF Dual 10" Under Seat Down Firing Subwoofer Enclosure for 2002-2013 Chevy Avalanche and Escalade EXT Trucks Dual 10" Under Seat Down Firing Unloaded Subwoofer Box For 2002-2013 Chevrolet Avalanche and Escalade EXT Trucks This Enclosure is Constructed Out of High Grade 5/8" MDF Wood Covered and finished with a Premium Charcoal Carpet Internal Air Space: 0.5 Cubic Ft per Chamber