Rockville RV8.2A 800 Watt Dual 8" Car Subwoofer Enclosure+Mono Amplifier+Amp Kit Rockville RV8.2A Single 8" Bass Enclosure System With matching Mono Block Amplifier 800 Watts Peak Power / 250 Watts RMS CEA-2031 Rating Dual 8" Bass Enclosure System with matching Mono Block Amplifier Quasi Transmission Line Cabinet Design. Fully adjustable low pass crossover: 50Hz - 250Hz Bonded, Stapled and Braced 3/5" MDF Cabinet