Wavemaster Stax. Audio output channels: 2.1, RMS rated power: 42 W, Recommended usage: universal. Amplification device type: amplifier, Amplification device form factor: built-in. Satellite speakers RMS power: 20 W, Satellite speaker frequency range: 150 - 20000 Hz. Subwoofer RMS power: 22 W, Subwoofer frequency range: 30 - 150 Hz, Subwoofer driver size: 124.5 mm (4.9 "). Power source: AC, AC input voltage: 230 V, Power consumption (standby): 0.5 W