The Q Power 15-Inch Heavy Duty Dual Sealed Enclosure is made with 1-inch MDF material with charcoal carpet covering, a vented design, and terminal cup connectors. Other features include 1 cu. ft. 2-hole surround and gold post terminal. Turn your ride into a sound machine with help from the Q Power 15-Inch Heavy Duty Dual Sealed Enclosure. Features: 1-sided MDF, 3/4-sided for the rest. Gold-tipped spring-loaded terminal. Premium charcoal carpet. Dual chamber. Slot port designations. Specifications: Speaker Size 15. Air Space 2.4 Cu. ft.. Height: 16.25 in. Width 36. Depth 16.25