BIC America V-1220 12-Inch 430-Watt Down-Firing Powered Subwoofer Down firing, Long-throw Subwoofer With Venturi-tuned Port 200w Max, 200w Rms Power Freq Resp: 26hz - 180hz Variable Signal-to-noise Ratio: &gt;80db Adjustable Crossover, Automatic On/off Signal Sensing