Boston Acoustics Horizon Series HPS-8Wi 8" 150-Watt Wireless Powered Subwoofer (White) (Discontinued by Manufacturer) 8" 150-Watt RMS wireless powered subwoofer High-output, front-firing rear-ported Deep Channel Design (DCD) drivers BassTrac circuitry for tight, distortion-free bass at all output levels 35Hz-150Hz frequency response (3dB) 40Hz-180Hz 24dB/octave low-pass subwoofer crossover