Excellent condition, rare and highly collectible set, fully factory, recently basic serviced. American version, works on 120 volts and comes with an external transformer. M-73 SPECS: Effective output 2 x 85W rms (8 Ω) Harmonic distortion factor 0.05% Frequency response 5 Hz to 100 kHz Input terminal 1V/50k Ω Output terminal 4 Ω ~ 16 Ω Damping factor 30 Signal-to-noise ratio 115dB Power supply voltage 120 VAC, 50Hz/60Hz Dimensions Width 480 x Height 142 x Depth 390 mm Weight 15.2 kg + 7,8 kg Year 1980 C-73 SPECS: Frequency response: 1Hz to 150kHz Total harmonic distortion: 0.002% Input sensitivity: 0.25mV (MC), 2.5mV (MM), 150mV (line) Signal to noise ratio: 76dB (MC), 93dB (MM), 106dB (line) Output: 150mV (line), 1V (Pre out) Dimensions: 459 x 417 x 163mm Weight: 10.1kg