Pioneer SX-3700 Quartz-Locked Receiver

The Pioneer SX-3700 represents a unique transition era in Pioneer’s receiver lineup, blending classic analog amplification with early digital tuner technology. Featuring a quartz-locked digital frequency display paired with an analog tuning scale, the SX-3700 delivers precise FM tuning while preserving the warm, musical character Pioneer receivers are known for.

With its brushed aluminum faceplate, balanced control layout, and walnut wood case, the SX-3700 offers a sophisticated vintage look that fits beautifully into any classic audio system. Sonically, it provides clean, stable power with excellent channel balance, making it ideal for vinyl, FM listening, and everyday music enjoyment.

This unit has been professionally serviced and restored, ensuring reliable operation, accurate tuning, and long-term listening confidence.

Condition: Excellent – Fully serviced, tested, and cleaned

Model: Pioneer SX-3700

Type: 2-Channel Stereo Receiver (Quartz-Locked Tuner)

Protection Plan: 1-Year Warranty Included

Free Support: Must be used before requesting return

Packaging: Securely packed, insured, and tracked

Accessories: Walnut Woodcase

SKU: 15JKE4567

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

Quartz-Locked Digital FM Tuning: Precise frequency stability with digital readout

Analog Tuning Scale: Classic visual reference paired with modern accuracy

Clean Stereo Power Output: Smooth, balanced sound suitable for vintage and modern speakers

Bass & Treble Controls: Fine tonal adjustment for room and speaker matching

Loudness, Muting & Filters: Enhanced low-level listening and noise control

Multiple Inputs: Phono (MM), AUX, Tape Monitor, and FM/AM

Speaker Selector: Supports dual speaker configurations

Headphone Output: Full, clear stereo headphone listening

Classic Pioneer Design: Brushed aluminum faceplate with real walnut wood cabinet

REFURBISHED

This Pioneer SX-3700 has undergone a comprehensive professional servicing process to ensure proper functionality, sound quality, and long-term reliability.

1. Fully Serviced

• Faceplate carefully cleaned and detailed; original lettering preserved
• All knobs, switches, and pushbuttons cleaned with DeoxIT and lubricated
• Volume, balance, tone, and selector controls tested for smooth, noise-free operation

2. Electronic Inspection & Restoration

• Power supply inspected and stabilized for consistent voltage delivery
• Aging or out-of-tolerance components replaced where required
• Bias and DC offset checked and adjusted for safe, optimal performance
• Heat-affected solder joints reflowed to ensure reliability

3. Tuner & Display System

• Quartz-locked FM tuner tested for frequency accuracy and lock stability
• Digital display verified for proper brightness and segment operation
• FM stereo indicator and signal circuitry confirmed for clean reception

4. Signal Path & Connectivity

• RCA inputs and speaker terminals cleaned and re-tensioned
• Phono stage tested for low noise and accurate gain
• Headphone output verified for balanced stereo playback

5. Final Testing & Quality Control

• Extended continuous operation testing performed
• All inputs and functions verified under real listening conditions
• Final listening tests confirmed clarity, channel balance, and stable performance

Result:
The Pioneer SX-3700 now performs with the clarity, stability, and musicality expected from a well-maintained Pioneer receiver—combining classic analog warmth with the convenience of quartz-locked digital tuning.

SUGGESTED PAIRINGS

• Speakers: Pioneer HPM-60 / HPM-100, JBL L26 / L100, KLH Model Five
• Turntables: Pioneer PL-530, Technics SL-1200, Thorens TD-160
• Tape Decks: Pioneer CT-F series, TEAC A-2300, Akai GX series
• Listening Style: FM radio, vinyl playback, classic rock, jazz, and everyday hi-fi listening

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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.