R/T 300 Enclosure Series (318-12 Pioneer) - Single 12" Slot Vented Sub Bass Hatchback Speaker Box with Labyrinth Power Port for Pioneer Subs Made in the USA with premium 3/4" MDF 1.85 Cu. Ft. Air Space/Tuning - 38 Hz Easy Hook Up Terminal Cups Automotive Grey Carpeting 20.0" W x 15.0" H x 15.0" D