Tivoli Audio Model Subwoofer for Model Two, Black/Silver 5-1/4 bass driver with built-in crossover network Volume level permits precise blending with your Model Two system based on preference and room acoustics Furniture grade Black finished ash wood cabinet with silver accents to coordinate with the Tivoli Model 2 Black Radio 20 watt internal amplifer May be powered using included 9-foot power cord, or like Model Two, via an optional 12V DC power supply