For your kind consideration is this vintage Pioneer Model SX-650 stereo receiver. It's been professionally serviced by Chicago's finest tech and is working flawlessly, as new, with no mods. Great condition with just a bit of wear on the corners. Sounds fantastic. Enjoy!
Tech Notes - Pioneer SX-650 (#292M) service. Entire pre/post regulation stages recapped for EQ amp (phono pre), tone amp, flat amp and filter amp stages, AM, FM, I.F. and MPX stages (all fresh Nichicon); load disconnect (speaker relay) delay circuit and protection circuit re-capped (fresh Nichicon); all pots and switches cleaned and rinsed; load disconnect (speaker relay) contact re-surfaced and contacts treated to prevent oxidation (all 8); scale lamps replace with correct incandescent type; previously installed incorrect "stereo" illumination removed and replaced with correct intensity illumination; tuning capacitor shaft brushes surfaced and shaft oiled; reduction gear assy oiled; all tuning string pulleys set; dial aligned physically to index "0" with tuning capacitor fully closed; front end R.F. stage oscillator aligned to be linear with tuned frequency for AM and FM; I.F. stages peaked; discriminator transformer re-aligned; MPX decoder aligned for proper stereo delivery and suppression of pilot. All functions operating as designed, including phono. All original components returned with unit.
Tuning range: FM, AM
Power output: 35 watts per channel into 8Ω (stereo)
Frequency response: 10Hz to 50kHz
Total harmonic distortion: 0.3%
Damping factor: 30
Input sensitivity: 7mV (mic), 2.5mV (MM), 150mV (DIN), 150mV (line)
Signal to noise ratio: 70dB (MM), 90dB (line)
Output: 150mV (line), 30mV (DIN)
Speaker load impedance: 4Ω (minimum)
Semiconductors: 1 x FET, 9 x IC, 21 x transistors, 29 x diodes
Dimensions: 480 x 149 x 371mm
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