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Sansui AU-20000

Integrated Stereo Amplifier (1975-77)

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Sansui AU-20000


The Sansui AU-20000 is an integrated stereo amplifier delivering a continuous 170 watts, minimum RMS, per channel, both channels driven into 8 ohms, over 20 to 20KHz bandwidth - with no more than 0.05 % total harmonic distortion.

Features include:

Eight-transistor equaliser with differential amps at initial stage gives an improved dynamic response, for an extremely accurate RIAA equalisation curve.

Triple protection circuits; temperature, DC voltage and ASO detection.

Selectable phono sensitivity/impedance, and a versatile tape monitor circuit make the AU20000 flexible and capable of handling a variety of recording and playback combinations.


Power output: 170 watts per channel into 8Ω (stereo)

Frequency response: 10Hz to 50kHz

Total harmonic distortion: 0.05%

Damping factor: 80

Input sensitivity: 3mV (MM), 130mV (DIN), 130mV (line)

Signal to noise ratio: 70dB (MM), 80dB (DIN), 80dB (line)

Channel separation: 55dB (MM), 60dB (line)

Output: 130mV (line), 30mV (DIN), 0.7V (Pre out)

Speaker load impedance: 4Ω to 16Ω

Dimensions: 460 x 178 x 400mm

Weight: 23.6kg

Year: 1976


Related Catalogues

HiFi Buyers Guide

Professional Series

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Reviewed Oct 29th, 2016 by adlerk76

I just got my AU 20000 completely restored. The Au 20000 is really a magnificent vintage integrated amp. It is so transparent and revealing. Good in good out. If you play a good LP that has been produced well it will blow you away, Also if you put a LP on that is worn or poorly produced it will sound bad, no hiding bad vinyl. The Au 20000 has great bass also. So Smoooooooth



re: AU-20000

Thank you very much for this Sansui amplifier AU model 20000 manual had time looking.
It is an excellent device that makes no noise at full volume, if no audio signal, seems to be off and it is also very powerful.
I use it with 4 baffles Cerwin Vega.
Now if I'll be able to repair my amplifier appreciated.
Thank you again.

Service Manual

Fantastic. I've been looking for this information for years, without having to pay an arm and a leg. Now I can repair this amp that has been on the shelf for 15 years.

Schamatic service manual sasui AU-20000

Dear Sir,

I'm looking for the above schamatic service manual sasui AU-20000.

I have tried to open it from your website it has refused,I would be very please if could help us to get the schamatic,I need only the part of the power amplifier diagram.

I'm looking forward for your help to get the diagram.

Best Regards,



You have to get adobe reader 9, once you download that program, the file will open.


These amps, along with Bozak concert grands (bi-amped), could be turned up all the way with no clipping or distortion. Still have 4 concert grands, lost the amps in a fire. Glad to here someone has the pleasure of listening to something from the past that i enjoyed for so many years. Never had any problems with them. Surprised you're having issues. I always turned the volume down before any function changes. You're takin me back to some great listening. Into pioneer at this point.



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