Type Active bass-reflex subwoofer Drivers 13" (33cm) "W" woofer Frequency response (+/-3dB) 20Hz - 150Hz Low frequency point (-6dB) 18Hz Subwoofer features Adjustable LPF: 50Hz to 150Hz (24dB/oct.), 48dB/oct. adjustable subsonic filter, adjustable phase, Boost mode, Night mode, 3 user memories, LFe/Stereo/Digital inputs. Recommended amplifier power 600W (750W max.) BASH® amplifier Dimensions (HxWxD) 211/16x1911/16x17" (535x500x432mm) Net weight 92.4lb (42kg)