Pioneer SX-850 65-Watt Stereo Solid-State Receiver - Fully Restored

This Pioneer SX-850 stereo receiver is in excellent physical and working condition. It has been fully restored by a professional repair technician. Many parts have been replaced including capacitors and resistors. It has been internally cleaned. Both channels have been biased and FM aligned. All pots and switches have been cleaned with Deox-It. This amplifier looks excellent inside and out. Everything has been brought back to factory spec and the unit sounds amazing.

The Pioneer will be well-packed and shipped within 1 business day. It is guaranteed to arrive in the condition described. The manual is freely downloadable at HiFi Engine.


The Pioneer SX-850 is a high power AM/FM stereo receiver with super-quiet phono equalizer and outstanding FM selectivity/sensitivity.

How do you know when to trust a stereo receiver to fill your musical needs?

Power output by itself is not much help, because unless your listening room is the size of a concert hall, a receiver with far less than concert-hall-sized output will do nicely.

The answer, obviously, is to put your trust in the circuitry the kind that you'll enjoy in the pioneer SX-850.

It delivers a continuous power output of 65 watts per channel, min RMS at 8 ohms, from 20 to 20,000 Hertz, with no more than 0.1% total harmonic distortion.

But even more importantly, it has the strength and finesse to handle that power with a healthy respect for musicality.

The SX-850 has a super-quiet phono equalizer in a 3-stage direct-coupled design to achieve wide dynamic range and +- 0.2dB RIAA equalization accuracy.

A FET in the Tone Control section, plus a 2-step frequency turnover switch for Bass and another for Treble, 2-deck monitor/dubbing, 2-system speaker drive, separable pre/main and more, mean further control versatility.

The superb FM/ AM section uses a dual-gate MOS FET and a 4-gang variable capacitor to boost sensitivity and selectivity, a PLL IC in the multiplex to improve stereo separation, and a special Integrated Circuit in the AM for still better reception and less noise.

It's the Pioneer SX-850 - the one you can trust to keep faith with your musical needs.

Technical Specifications

Specification	Detail
Tuning range	FM, MW
Power output	65 watts per channel into 8Ω (stereo)
Frequency response	10Hz to 50kHz
Total harmonic distortion	0.1%
Damping factor	25
Input sensitivity	6.5mV (mic), 2.5mV (MM), 150mV (DIN), 150mV (line)
Signal to noise ratio	70dB (MM), 90dB (line)
Output	150mV (line), 30mV (DIN), 1V (Pre out)
Speaker load impedance	4Ω (minimum)
Semiconductors	3 x FET, 3 x IC, 56 x transistors, 36 x diodes
Dimensions	526.6 x 173 x 411.5mm
Weight	19.1kg
Accessories	FM T-type antenna
Year	1976