Samsung AV-R720, 850 W, 7.1 channels, 1%, 450 mV, 47000 Ω, 80 dB Samsung AV-R720. Power output per channel (20-20KHz@8 Ohm): 850 W, Audio output channels: 7.1 channels, Total Harmonic Distortion (THD): 1%. Speakers connectivity type: Banana connector. Supported radio bands: FM, FM band range: 87.5 - 108 MHz. Analog signal format system: NTSC, PAL. AC input voltage: 230 V, AC input frequency: 50 Hz, Power consumption (standby): 0.9 W