Fantastic amplifier! Compact and robust. Built like a tank. Sound is very clean and detailed. A pleasure to listen to. Power seems much greater than prescribed. In my collecction of vintage amps, this is definitely one my favorites. Specifications Power output: 45 watts per channel into 8 Ohm Frequency response 20Hz-100kHz Total harmonic distortion: 0.2% Damping factor: 25 Input sensitivity: 2.5mV (MM), 150mV(line) Signal to noise ratio: 70dB(MM), 90dB(line) Output: 150mV (line), 30mV (DIN) Speaker load impedance: 4Ohm to 16Ohm Semiconductors: 2×IC, 23×transistors, 16×diodes Dimensions: 390×145×290mm Weight: 8.7 kg Year: 1976.