Trust 5.1 Surround Speaker Set SP-6600A, 5.1 channels, 23 W, 5 W, 8.27 x 2.76 x 2.83" (210 x 70 x 72 mm), 18 W, 7.28 x 8.27 x 10.9" (185 x 210 x 277 mm) Trust 5.1 Surround Speaker Set SP-6600A. Audio output channels: 5.1 channels, RMS rated power: 23 W. Satellite speakers RMS power: 5 W. Center speaker dimensions (WxDxH): 8.27 x 2.76 x 2.83" (210 x 70 x 72 mm). Subwoofer RMS power: 18 W, Subwoofer dimensions (WxDxH): 7.28 x 8.27 x 10.9" (185 x 210 x 277 mm)