Logitech Z906. Audio output channels: 5.1 channels, RMS rated power: 500 W, Recommended usage: Universal. Satellite speakers RMS power: 268 W, Satellite speaker dimensions (WxDxH): 100.3 x 93.5 x 166.3 mm, Satellite speaker weight: 890 g. Center speaker RMS power: 67 W, Center speaker dimensions (WxDxH): 166.3 x 93.5 x 100.3 mm, Center speaker weight: 890 g. Subwoofer RMS power: 165 W, Subwoofer dimensions (WxDxH): 281 x 319 x 293 mm, Subwoofer weight: 9 kg. Power source: AC