Sony SRS-D25RC. Audio output channels: 2.1, RMS rated power: 25 W, Recommended usage: PC. Satellite speakers RMS power: 10 W, Satellite speaker frequency range: 70 - 16000 Hz, Satellite speaker mid-range driver size: 38.1 mm (1.5 "). Subwoofer RMS power: 15 W, Subwoofer impedance: 4 Ом, Subwoofer driver size: 66 mm (2.6 "). Power source: AC, Power consumption (typical): 24 W. Satellite speaker dimensions (WxDxH): 65 x 65 x 67.5 mm, Subwoofer dimensions (WxDxH): 208 x 118 x 130 mm, Subwoofer weight: 2 kg