Very rare high power and quality amplifier from the golden Sony age. SYSTEM: All silicon-transistor stereo integrated amplifier MAIN section: Direct output coupling, quasi-complementary symmetry circuit (SEPP, OTL) PRE section: Direct coupling equalizer amp, capacitor coupled flat and tone control amp, combined NF type and CR type tone control. Integrated pre and power amplifier in studio quality for discerning hi-fi friends. The high standard and the available output power make, this device is also suitable for professional use. Differential amplifier with speaker outputs coupled directly-without capacitors provide wide frequency response, lowest distortion, High damping factor, large power output. Connections for: Two turntables, tape recorder, tuner, three Auxiliary (AUX), two speaker pairs Precise tone control through each stage a 11 deep and height controller. Separate switchable low and height filter. Power output: 50 watts per channel into 8Ω (stereo) Frequency response: 10Hz to 200kHz Total harmonic distortion: 0.05% Input sensitivity: 1.2mV (MM), 130mV (DIN), 130mV (line) Signal to noise ratio: 70dB (MM), 90dB (DIN), 90dB (line) Speaker load impedance: 4Ω (minimum) Dimensions: 400 x 149 x 327mm Weight: 15 kg Original paint, untouched inside, all working distortion free. See details on photos. Carefully shipped!