2019/01/04

SANSUI AU-5500 repair - 3

au5500-service-manual-top2.jpg

For repair of Sansui AU-5500, I got the service manual from web. It is a very happy to obtain an electronic manual of this vintage amp.

The outline specifications of AU-5500 are as follows:

- Output power: 32 W + 32 W (8 Ω, 1 kHz)
- Total harmonic distortion ratio: 0.15% (at rated output)
- Frequency response: 10 - 35000 Hz (+ 0.5 dB, -1 dB)
- S / N ratio: 85 dB or more
- Channel separation: 55 dB or more (1 kHz at rated output)
- Damping factor: 30 (8 Ω)

au5500-spec.jpg

Although it is unbelievable spec now, the stereo amplifier of this era was such a thing. From the days after that, the audio industry became competing in the specifications, and the physical characteristics were competed.

The next year 1975, AU-707/607 amplifier which became a big turning point of Sansui was released, so it seems that this 4-digit model number series has been discontinued for a few years.

au5500-sm-blockdiagram.jpg

posted by toons at 04:16 | Audio