Double 12" Subwoofer MDF Enclosure with Built-In Amplifier, Black Woven Vinyl Finish, 1300 Watts Max Power Handling, Built In Monoblock Amplifier, Built in 500 Watts Max Class A/B Amplifier with Bass Remote Controller. LPF: 50-200Hz. MDF Subwoofer Enclosure with Slot Vent finely tuned to this sub/amp combo for optimal sound and efficiency. Box Dimensions (Length x Height x Bottom Width/Top Width): 35" x 14" x 12.5"/8.5" This combo package is engineered and tuned to work in unison to produce unparalleled sound quality and superb output. Just drop it in your trunk, plug it in, and enjoy this great DS18 bass system.