Sony STR-DA5400ES. Audio output channels: 7.1, Total Harmonic Distortion (THD): 0.09 %, RMS rated power: 240 W. Supported radio bands: AM, FM. Power consumption (typical): 480 W, Power consumption (standby): 0.9 W. Weight: 16.5 kg. Power requirements: 230 V 50 - 60 Hz, Dimensions (WxDxH): 430 x 430 x 175 mm