DENON surround amplifier AVC-1870. Regarding operation: CD input and front output have been tested. Other functions have not been tested. Remote control and box are not included. Details: ★ Power Amplifier Section Rated Output (8 ohms load, 20Hz～20kHz, T.H.D. 0.08%) / Front: 80W + 80W, Center: 80W, Surround: 80W + 80W, Surround Back: 80W Practical Maximum Output (6 ohms, EIAJ) / Front: 130W + 130W, Center: 130W, Surround: 130W + 130W, Surround Back: 130W Output Terminals / Front & Center & Surround: 6～16 ohms, Surround Back: [A, B] 6～16 ohms, [A+B] 12～16 ohms ★ Analog Section Input Sensitivity/Impedance / 200mV/47kΩ S/N Ratio / 100dB (TONE DEFEAT ON) Frequency Response / 10Hz～100kHz (+1dB, -3dB) (TONE DEFEAT ON) Distortion Rate / 0.08% (20Hz～20kHz) Power Supply: AC100V・50/60Hz Power Consumption: 220W Maximum External Dimensions: W434 x H171 x D417mm Weight: 11.7kg Please understand that this is an old and used item before purchasing. * Returns and exchanges are not accepted. Please read the description carefully. If you have any questions or concerns, I can add photos, so please feel free to comment. * If there are any problems after purchase, please comment before leaving a rating.