Q Power QBDODGEQC112 Single 12" Ported Under Seat Subwoofer Enclosure for 2002-2016 Dodge Quad Cab Trucks with Spray Liner Finish Single 12" Ported Underseat Upfire- Unloaded Subwoofer Box For 2002-2016 Dodge Quad Cab Trucks, Does NOT fit Mega Cab This Enclosure is Constructed Out of High Grade 3/4" MDF Wood Finished with a Durable Bed Liner Coating and Constructed with High Quality Spring Loaded Terminals Internal Air Space: 0.9 Cubic Ft