Rockville RSQ15 Single 15" 2.6 cu.ft. Sealed Car Subwoofer Enclosure Sub Box Rockville RSQ15 Single 15" 2.6 cu.ft. Sealed Subwoofer Enclosure Box Designed for 15" Subwoofers. Machine precision cut mounting holes USA Heavy Duty MDF Construction. Top of the line Glue for extra durable adhesion High quality GOLD spring loaded terminals. Designed to give the best sound quality Designed, tested, and engineered to work perfectly with high powered subs Rockville RSQ15 Single 15&#034; 2.6 cu.ft. Sealed Subwoofer Enclosure Box Designed for 15&#034; Subwoofers Machine precision cut mounting holes USA Heavy Duty MDF Construction Top of the line Glue for extra durable adhesion High quality GOLD spring loaded terminals Designed, tested, and engineered to work perfectly with high powered subs Designed to give the best sound quality Type of Enclosure: Sealed Enclosure Sub Size: Single 15&#034; Dimensions in Inches: 18&#034; L x 21&#034; W x 16.25 H&#034; Top and Bottom Depth: 18&#034; Mounting Depth: up to 11.75&#034; (enough depth for any sub on the market) Gross Volume Per Sub (Measurement for the outer dimensions of the box): 3.5 Cubic Feet Net Volume Per Sub (Measurement for the outer dimensions of the box less the thickness of the wood): 2.6 Cubic Feet