Cambridge Azur 550A. Peak power per channel: 60 W, Amplifier class: A/B, Total Harmonic Distortion (THD): 0.002 %. Speakers connectivity type: RCA, Multichannel pre out connectivity: RCA. Input frequency: 50/60 Hz, Input voltage: 220-230 V, Power consumption (typical): 500 W. Width: 430 mm, Depth: 350 mm, Height: 120 mm