JL Audio ACP110LG-TW1 400W MicroSub+ Amplified Subwoofer Ported-Enclosure System with Single 10" 10TW1 Subwoofer Single 10" Vented Subwoofer Enclosure with Built-In Amplifier Power Output: RMS: 400 Watts Total Preloaded with single 10" TW1 Series Subwoofer Driver - 10TW1-0.25 Built-in DCD Class D amplifier Enclosure Dimensions: 6.625" D x 21.00" W x 13.50" H