R/T 300 Enclosure Series 328-12 Alpine - Dual 12-Inch Slot Vented Sub Bass Hatchback Speaker Box with Labyrinth Power Port for Alpine Subs Made in the USA with premium 3/4" MDF 1.85 Cu. ft Air Space Per Chamber/Tuning - 38 Hz Easy Hook Up Terminals 35" W x 15.0" H x 15" D Automotive Grey Carpeting