GoldMaster S-2101. Audio output channels: 2.1, RMS rated power: 20 W, Recommended usage: PC. Signal-to-Noise Ratio (SNR): 70 dB. Satellite speakers RMS power: 10 W, Satellite speaker frequency range: 55 - 20000 Hz. Subwoofer RMS power: 10 W, Subwoofer impedance: 6 Ом, Subwoofer driver size: 101.6 mm (4 "). Power source: AC