Pioneer SX-3700 Stereo Receiver

The Pioneer SX-3700 is a vintage stereo receiver that combines legendary Pioneer engineering with a classic design. Featuring 45 watts per channel, this receiver delivers clean, dynamic sound while retaining the aesthetic charm of its 1970s heritage. It boasts a classic brushed aluminum faceplate, functional VU meters, and a warm walnut wood case, making it not only a great performer but also a centerpiece for any audio collection.

This unit has been expertly restored and serviced to ensure long-term reliability and optimal performance. Fully cleaned, tested, and calibrated, the Pioneer SX-3700 is ready to provide top-quality sound for years to come, making it the perfect addition to any vintage audio setup.

• MODEL: Pioneer SX-3700
• TYPE: Stereo Receiver
• PROTECTION PLAN: 1-Year Warranty Included
• FREE SUPPORT: Must be used before requesting return
• SKU: 15JKE4518

Customer Service:

Once your item arrives, if you have questions about how your item functions or proper settings, please CONTACT US.

TRADE-IN PROGRAM

“If you have any vintage audios (receivers, speakers, cassette, reel to reel…) & want to upgrade with the serviced one, don’t hesitate to contact us for the best deal. You only need to pay for the difference between yours & mine….”

Note:

The actual color of the product may sometimes differ slightly from the photos due to lighting conditions, temperature, and the device used. Some angles in the photos may not fully reflect the product’s condition. Please read the description carefully and feel free to message us if you have any questions.

SPECS

• Tuning range: FM, MW
• Power output: 45 watts per channel into 8Ω (stereo)
• Frequency response: 10Hz to 100kHz
• Total harmonic distortion: 0.02%
• Damping factor: 40
• Input sensitivity: 2.5mV (MM), 150mV (line)
• Signal to noise ratio: 79dB (MM), 95dB (line)
• Output: 150mV (line)
• Dimensions: 18.90 × 5.71 × 14.33 inches
• Weight: 25.57 lbs
• Year: 1980

KEY FEATURES

Power Output: 45 watts per channel at 8Ω, offering reliable and clear sound reproduction.

Tone Controls: Bass, Treble, and Balance controls for fine-tuning the sound to your preference.

Connectivity: Includes Phono, Tape, and Aux inputs, ensuring compatibility with various audio sources.

FM/AM Tuner: Quartz-locked tuning for accurate and stable reception.

Design: Classic brushed aluminum faceplate with walnut wood side panels for an authentic vintage look.

Speaker Connections: Dual speaker connections (A/B) for flexibility in speaker configurations.

Volume & Balance: Easy-to-use knobs for controlling the volume and adjusting balance.

REFURBISHED

This Pioneer SX-3700 has undergone a comprehensive professional restoration to recover its original performance, operational stability, and classic presentation. The receiver has been carefully serviced inside and out.

The front faceplate shows minor scratches and light oxidation consistent with age and long-term use. These cosmetic imperfections are purely aesthetic and do not affect functionality. They remain as part of the unit’s authentic vintage character.

1. General Service & Cleaning

• Faceplate, knobs, and switches cleaned and detailed while preserving original silk-screen markings.
• All potentiometers and selector switches deoxidized and lubricated for smooth, noise-free operation.
• Internal dust removal and chassis cleaning performed to improve longevity and heat dissipation.

2. Electronic Inspection & Restoration

• Power supply section inspected and stabilized for consistent voltage delivery.
• Aging or out-of-spec components replaced with high-quality equivalents where necessary.
• Bias and DC offset adjusted to factory-correct specifications for optimal channel balance and clarity.
• Heat-stressed solder joints reflowed to improve long-term reliability.

3. Signal Path & Connectivity

• RCA inputs and speaker terminals cleaned and secured to ensure strong signal transfer.
• Phono stage tested for proper gain structure and low noise performance.
• Headphone output verified for balanced stereo operation.

4. Tuner & Illumination System

• FM/AM tuner section tested and aligned for stable reception and accurate tuning.
• Signal strength and tuning meters verified for correct response.
• Dial and meter illumination serviced to ensure consistent brightness and classic visual appeal.

5. Final Testing & Quality Control

• Extended burn-in testing performed under load conditions.
• All inputs, outputs, and functions verified for full operational status.
• Channel balance, dynamics, and thermal stability confirmed during listening evaluation.

RESULT

The Pioneer SX-3700 now delivers clean, dynamic, and balanced sound performance true to its original design. It operates reliably across all functions, with stable power delivery and low noise characteristics.

While minor cosmetic signs of age remain on the front panel, they do not impact performance and simply reflect the authentic history of this late-1970s classic receiver.

This unit is fully restored, tested, and ready for many more years of dependable vintage hi-fi enjoyment.

SUGGESTED PAIRINGS

• Speakers: JBL L100, Wharfedale Linton, KLH Model Five, Pioneer HPM-100
• Turntables: Thorens TD-160, Dual 1219, Technics SL-1200
• Tape Deck: Marantz 5025, TEAC A-2300, Akai GX-747
• Other Audio Gear: Perfectly complements vintage gear from Pioneer, Sansui, or Marantz

🎁 Unlock an instant $100 voucher with every combo purchase.

PACKAGING & SHIPPING

Secure Packaging:

• High-density foam inserts with 5-layer corrugated cartons
• Additional internal padding and wrap for transit protection

• Double-wall outer box with corner guards and straps

Shipping Details:

• Dispatch Time: Ships within 3 business days

• Carrier: UPS Ground (tracked & insured)

• Signature Required: Yes (as buyer’s request)

• Transit Time: Typically 3–7 business days (USA)

International Shipping:

 We offer global delivery through the eBay International Shipping Program. eBay handles customs, duties, and tracking.

📦 Note: Packaging may vary slightly depending on unit size or availability, but safety and protection are always our top priority.