Empire Media KS-1000. Audio output channels: 2.1, RMS rated power: 30 W, Recommended usage: PC. Satellite speaker type: 2-way, Satellite speakers RMS power: 30 W, Satellite speaker frequency range: 55 - 20000 Hz. Subwoofer type: Active, Subwoofer driver size: 57.1 mm (2.25 "). Power source: AC. Satellite speaker dimensions (WxDxH): 85 x 75 x 165 mm, Subwoofer dimensions (WxDxH): 230 x 191 x 185 mm