Bose Lifestyle V20 System. Audio output channels: 5.1. Center speaker dimensions (WxDxH): 159 x 105 x 79 mm, Subwoofer dimensions (WxDxH): 549 x 330 x 203 mm. Dimensions (WxDxH): 44 x 191 x 68 mm, Surround speaker dimensions (WxHxD): 79 x 157 x 102 mm