Tivoli Audio Model Subwoofer. Subwoofer type: Active, Subwoofer RMS power: 20 W, Subwoofer crossover frequencies: 50 - 80 Hz. Colour of product: Black, Silver. Subwoofer width: 240 mm, Subwoofer depth: 160 mm, Subwoofer height: 170 mm. Cables included: AC