Pioneer's flagship four-channel receiver amplifier, a machine untouched by time, in amazing - showroom collector's condition, very strong, in fully factory state and fully functional. SPECS: Power output: 2 x 60W rms (stereo), 4 x 40W rms (quadraphonic) Frequency response: 7Hz to 25kHz Total harmonic distortion: 0.3% Damping factor: 35 Input sensitivity: 2.5mV (MM), 150mV (line) Speaker load impedance: 4Ω to 16Ω Dimensions: 550 x 160 x 440mm Weight: 22.5 kg Year: 1974 The photos in the ad are of the actual machine for sale.