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Pioneer SX650

Stereo Receiver

(Solid state)


FRONT PANEL : anodized silver. Upper level : FM/AM dial. Power lamp. Signal strength meter. Tuning meter. Stereo lamp. Lower level : Headphone jack. Power/Speakers selector (power off/on-speaker system A/off/ system B/A+B). Bass and treble controls. Hi filter. FM muting. Balance. Volume. Loudness. Stereo/mono selector. Tape monitor 1 and 2. Function (AM/FM/Phono/Aux or Mic). Mic jack.

REAR PANEL. Upper level: AM/FM antenna Ground FM/AM emphasis -  AM Ferrite Antenna . Lower level: Tape rec 1 and 2 output. Tape 1 and 2 inputs Phono Aux System A and System B speakers. AC outlet (n. 2)


Interior view (from the original Pioneer brochure)



Power Output: 35 watts per channel RMS into 8 ohms.

Harmonic Distortion: Less than 0.3%

Intermodulation Distortion: Less than 0.3%

FM Sensitivity: 1.9μV (mono) 4.9μV (stereo)

FM Capture Ratio: 1.00

FM Harmonic Distortion Mono: <0.15

FM Harmonic Distortion Stereo: <0.3%



Dimensions: 19 x 6 x 14.5  

Weight: 29.00 lbs

Years : 1976 - 1977


The SX-650 the follow-up model to the SX-636.  It was distinguished by the silver AM/FM analog tuner dial that was the mark of Pioneer receivers in the "50" series. 

Are available on request :

  • the original Pioneer brochure with many diagrams and all specifications of the unit.




  • the service manual





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