Rockville RDV12M Dual 12" Vented w/Divided Chambers 2.0 Cu Ft/Side Sub Enclosure Rockville RDV12M Dual 12" 3.98 cu.ft. MDF Dual Chamber Subwoofer Enclosure Box Designed For 12" 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 Rockville RDV12M Dual 12&#034; 3.98 cu.ft. MDF Dual Chamber Subwoofer Enclosure Box Designed For 12&#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 Tuning frequency: 41Hz Type of Enclosure: Dual Vented Chamber Enclosure Sub Size: Dual 12&#034; Dimensions in Inches: 34&#034; L x 18&#034; W x 15 H&#034; Top and Bottom Depth: 15&#034; Mounting Depth: up to 11&#034; (enough depth for any sub on the market) Gross Volume Per Sub (Measurement for the outer dimensions of the box): 5.31 Cubic Feet Net Volume Per Sub (Measurement for the outer dimensions of the box less the thickness of the wood): 3.98 Cubic Feet