Pioneer SX-3700 Vintage Stereo Receiver – 45 WPC, Made in Japan

Pioneer SX-3700 — Fluoroscan-Era Pioneer, in Ottawa Valley Cherry or Its Original Pioneer Cabinet

A beautiful example of early-1980s Pioneer engineering — the Pioneer SX-3700 stereo receiver, serviced on our bench and offered two ways: with its original cabinet lifted from its faux-walnut vinyl wrap and re-veneered by Radique Audio in genuine Ottawa Valley cherry, or still wearing the faux-walnut cabinet Pioneer built for it. The SX-3700 captures Pioneer at a unique transitional moment between pure analog design and the early digital era — quartz-locked FM tuning, the unmistakable blue Fluoroscan display, and the warm musical character Pioneer’s amplifier sections were celebrated for. Made in Japan, 1980–1982. Choose your cabinet above.

Sound and Performance

Rated at 45 watts per channel into 8 ohms with just 0.02% THD, the SX-3700 punches well above its modest wattage figure. Pioneer’s direct-coupled amplifier topology delivers tight, controlled bass, clear midrange, and extended highs with the kind of warm, engaging character that has earned this generation of Pioneer receivers a devoted following. The 10 Hz – 100 kHz frequency response and damping factor of 40 give it confident speaker control across a wide variety of loads, and the 79 dB (MM) / 95 dB (line) signal-to-noise figures mean vinyl playback reveals subtle musical detail without intrusive hum or hiss.

Exceptional Tuner Section

The FM tuner is genuinely one of the strongest mid-range tuner sections Pioneer ever shipped. A 4-gang tuning capacitor with varactor-controlled local oscillator and Pioneer’s P.D.Q. (Pioneer Digital/Quartz) quartz-servo lock keeps frequency rock-steady, while the 5-digit Fluoroscan readout displays tuning with precision well beyond the 4-digit displays of competing mid-range receivers of the era. The dual analog dial backup provides a classic visual element, and the result is FM reception quality that rivals tuners from far more expensive Pioneer models.

Design and Controls

The brushed silver faceplate is anchored by Pioneer’s iconic blue Fluoroscan digital display — the same striking glowing-blue meters seen on the SX-3800 — paired with traditional analog controls for that perfect transitional-era look. Independent bass, treble, and balance controls; MM phono input; auxiliary line input; two tape inputs with independent monitoring; stereo headphone output; dual speaker outputs supporting two pairs simultaneously; and two switched AC outlets on the rear for convenient turntable and accessory power. The control layout is clean, the action is smooth, and the visual presence is unmistakably Pioneer.

Choose Your Cabinet

Ottawa Valley cherry

This is the SX-3700’s original Pioneer cabinet, refinished by Radique Audio in genuine Ottawa Valley cherry veneer. Pioneer shipped these receivers in a faux-walnut vinyl wrap that rarely survives four decades intact; we strip it back to the bare carcass and re-veneer the top and sides in furniture-grade cherry, keeping the factory dimensions and profile exactly as designed while giving the receiver a presence the vinyl could only imitate.

The Ottawa Valley cherry veneer is solid, locally sourced, and finished to show off the wood’s warm reddish-gold grain. Cherry darkens and deepens beautifully with age and exposure to light, so this cabinet will only become more striking with the years. The pairing with the brushed silver faceplate and glowing-blue Fluoroscan display is genuinely stunning in person.

This SX-3700 has been freshly serviced and fully verified across all functions. The Fluoroscan display glows bright and even, the power meter responds accurately to signal input, FM tuning is precise and stable, all inputs deliver clean signal, and all controls operate smoothly without scratching or intermittence. Brought back to factory specification both electrically and operationally — ready to anchor a vintage system for many years to come.

Original Pioneer faux-walnut cabinet

This SX-3700 wears the cabinet it left the factory in: Pioneer’s faux-walnut vinyl-wrapped enclosure, in very good condition and free of marks. That factory finish rarely survives four decades unblemished; this one has, with the brushed silver faceplate and glowing-blue Fluoroscan display framed exactly as Pioneer designed them. See the photos for a close look.

This SX-3700 has been through our Level 1 service: every input, output and control tested, all pots and switches deep-cleaned and deoxidized, any blown indicator lamps replaced, and the power supply wiring checked and cleaned, followed by burn-in and sign-off testing on our bench. Like every unit we service, it then passed a second bench test by a different tech before being listed.

Pioneer SX-3700 Specifications

• Tuning range: FM, MW (AM)
• Power output: 45 W/ch into 8 ohms (stereo)
• Frequency response: 10 Hz – 100 kHz
• Total harmonic distortion: 0.02%
• Damping factor: 40
• Input sensitivity: 2.5 mV (MM phono), 150 mV (line)
• Signal-to-noise ratio: 79 dB (MM phono), 95 dB (line)
• FM tuner: 4-gang variable capacitor, P.D.Q. quartz-servo lock
• Display: 5-digit blue Fluoroscan digital readout, analog dial backup
• Tone controls: Independent bass, treble, balance
• Phono input: 1 x MM
• Tape inputs: 2 with independent monitoring
• Outputs: Dual speaker outputs (two pairs), stereo headphone
• AC outlets: 2 switched (rear)
• Year of introduction: 1980–1982
• Country of manufacture: Japan
• Dimensions (W × D × H): 480 × 364 × 145 mm (18.9 × 14.3 × 5.7 inches)
• Weight: 11.6 kg (25.6 lbs)
• Cabinet: original Pioneer faux-walnut cabinet, or the original cabinet with the vinyl removed and the top and sides re-veneered by Radique Audio in genuine Ottawa Valley cherry

⚠️ Important Information for International Buyers

This receiver is configured for North American 110/120V power. Buyers outside North America will require a step-down transformer and appropriate plug adapter.

✅ Buy With Confidence — The Radique Promise

Backed by Radique’s 90-day warranty and our Perpetual Trade-Back Program. When you’re ready to move on, we’ll take it back. That’s the Radique difference.

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