Yamaha R-S300. Total Harmonic Distortion (THD): 0.015 %, Signal-to-Noise Ratio (SNR): 100 dB, Impedance: 8 Ом. Connectivity technology: Wired. Power consumption (standby): 0.5 W. Weight: 8800 g. Dimensions (WxDxH): 435 x 387 x 151 mm, Output power: 85 W