B&W ASW610. Subwoofer type: Active, Subwoofer RMS power: 200 W, Subwoofer frequency range: 20 - 140 Hz. Power consumption (typical): 40 W, Power consumption (standby): 0.5 W. Colour of product: Black. Subwoofer width: 310 mm, Subwoofer depth: 375 mm, Subwoofer height: 310 mm