Pioneer SX-3700 Stereo Receiver

The Pioneer SX-3700 is a highly regarded stereo receiver from the golden era of high-fidelity audio equipment, combining a classic design with exceptional sound quality. With its sleek, brushed aluminum faceplate and rich walnut side panels, the SX-3700 represents the quintessential vintage aesthetic that Pioneer is known for. This receiver offers 45 watts per channel of clean, powerful sound, ideal for vintage audio enthusiasts seeking reliable performance.

Fully serviced and restored by our expert technicians at HQaudios, this unit brings both performance back to showroom condition. Whether you’re an audiophile or a vintage audio collector, the Pioneer SX-3700 will deliver outstanding sound, making it an ideal addition to any setup.

• MODEL: Pioneer SX-3700
• TYPE: Stereo Receiver
• PROTECTION PLAN: 1-Year Warranty Included
• FREE SUPPORT: Must be used before requesting return
• SKU: 15JKE4217

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: 18.9 x 5.71 x 14.33 inches
• Weight: 25.57 lbs
• Year: 1980

KEY FEATURES

• Power Output: 45 watts per channel at 8Ω, delivering clear, distortion-free audio
• Design: Classic brushed aluminum faceplate with walnut side panels, offering a vintage, premium look
• Connectivity: Includes Phono, Tape, and Aux inputs for versatility
• FM/AM Tuner: Quartz-locked tuning with stable reception and precise tuning
• Tone Controls: Bass, Treble, and Balance controls for customized sound
• Loudness Control: Enhances low-frequency response at lower volumes
• Speakers: Dual speaker connections (A/B) for flexible audio setups

REFURBISHED

This Pioneer SX-3700 has undergone a full, professional restoration to restore its performance, reliability, and listening confidence while maintaining its original vintage charm. The receiver has been thoroughly serviced, ensuring optimal sound quality and consistent performance for years to come.

1. General Service & Cleaning

• Faceplate, knobs, and switches cleaned and detailed to restore the unit’s original appearance
• All controls deoxidized and lubricated for smooth, noise-free operation
• Original markings and finish preserved, maintaining its classic look, although minor scratches and slight wear on the knobs are visible due to age

2. Electronic Inspection & Restoration

• Power supply inspected and stabilized for consistent, reliable performance
• Out-of-spec components replaced with high-quality new parts
• Bias and DC offset adjusted to factory-correct parameters for optimal sound quality
• Heat-stressed solder joints reflowed for long-term reliability

3. Signal Path & Connectivity

• RCA inputs and speaker terminals cleaned and re-tensioned for maximum signal integrity
• Phono stage tested for correct gain and low noise
• Headphone output verified for balanced, distortion-free stereo performance

4. Tuner & Meter System

• FM/AM tuner fully aligned for stable reception and accurate tuning
• Signal strength and tuning meters verified for correct operation
• Dial and meter illumination restored, ensuring even brightness

5. Final Testing & Quality Control

• Extended burn-in and real-world listening tests performed to ensure consistent performance
• All inputs, outputs, and functions tested to confirm full operational status
• Channel balance, dynamics, and thermal stability verified during testing

While the Pioneer SX-3700 has been professionally restored, the front panel does show minor signs of age, including small scratches and slight oxidation in some areas. Although every effort was made to restore the finish, the aesthetic imperfections remain visible. These do not affect the unit’s functionality or performance and are simply part of the charm of owning a vintage audio component.

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.