Sansui Solid State Stereophonic Amplifier AU-999 purchased in the 1970s. Always well preserved with some signs of wear, as shown in the photos. Completely original, recently cleaned thoroughly. In working order (until a few days ago it was connected to the CD player, radio, turntable and speakers). Cable with power plug. Original connection diagram supplied. It is usually connected to radio, speakers and CD player. Not all outputs/inputs have been tested, it has always worked and still works well. Not included: original box, instruction manual (there is only the connection diagram, but the rest can be easily found online). Features: Power output: 50 watts per channel into 8 Ω (stereo) Frequency response: 20 Hz to 70 kHz Total harmonic distortion: 0.4% Damping factor: 45 Input sensitivity: 3 mV (mic), 2 mV (MM), 200 mV (DIN), 200 mV (line) Signal-to-noise ratio: 80 dB (mic), 80 dB (MM), 85 dB (line) Output: 200 mv (line), 30 mV (DIN) Speaker load impedance: 4 Ω to 16 Ω Semiconductors: 41 x transistors, 16 x diodes, 2 x TRIACs