Pioneer SX-850

The classic silver faced wide body SX. Amber lights, walnut case, silver bling, and oh yes... it sings.

Production

1976

Factory Specs

Tuning range AM, FM

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

The History of Pioneer

Pioneer was founded by Nozomu Matsumoto in 1938 in Tokyo as a radio and speaker repair shop. In December 1953 Mr. Nozomu Matsumoto succeeded in developing the first domestic dynamic speaker made of original parts. It was named A-8 and marketed in Japan under the Pioneer brand. It later became the origin of the HiFi ...
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Liner Notes

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.