Specifications: Down Firing, Front Vented Bass Reflex Active Subwoofer Frequency Response: (+/-3dB) 30-100Hz MOSFET power amplifier - 225 watts - 75 Watts RMS Woofer: 8" High Excursion Injection Molded Poly cone Front Control for simple level adjustment Crossover system pre tuned to perfectly blend with the MS satellite speaker RCA and High Level inputs for flexibility with virtually any audio video receiver Height: 423mm (16.7") Width: 239mm (9.4") Depth: 360mm (14.2") Weight: 10kg (22 lbs)