Altec Lansing PT6021 Home Theater Audio System, Black. RMS rated power: 58 W, Audio output channels: 2.1, Signal-to-Noise Ratio (SNR): 78 dB. Satellite speakers RMS power: 7 W. Subwoofer RMS power: 44 W, Subwoofer driver size: 165.1 mm (6.5 "). Subwoofer dimensions (WxDxH): 216 x 198 x 406 mm. Power requirements: 120 V AC, 60 Hz, Surround speaker dimensions (WxHxD): 64 x 26 x 365 mm, Set weight: 8600 g