Pioneer SX850 Vintage Receiver

The Pioneer SX850 is a classic vintage receiver, revered for its blend of power, sound quality, and timeless design. With 60 watts per channel into 8 ohms, this receiver offers the right balance between performance and versatility, making it a standout piece for collectors and audiophiles. Known for its smooth audio reproduction and durable build, the SX850 delivers excellent clarity and dynamic range, making it an excellent choice for anyone looking to enhance their stereo system with a piece of audio history.

This Pioneer SX850 has been professionally serviced and fully restored by HQaudios, ensuring it operates just as it did when first manufactured, if not better. With new components, precise calibration, and extensive testing, this receiver offers reliable performance and visual appeal. The elegant brushed aluminum faceplate and wood veneer finish give it a classic look, making it a centerpiece in any audio setup.

• CONDITION: Excellent – Serviced, restored and cleaned
• MODEL: Pioneer SX850
• TYPE: 2-Channel Stereo Receiver
• PROTECTION PLAN: 1-Year Warranty Included
• FREE SUPPORT: Must be used before requesting return
• SKU: 15TTE0705

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: 65 watts per channel into 8Ω (stereo)
• Frequency response: 10Hz to 50kHz
• Total harmonic distortion: 0.1%
• Damping factor: 25
• Input sensitivity: 6.5mV (mic), 2.5mV (MM), 150mV (DIN), 150mV (line)
• Signal to noise ratio: 70dB (MM), 90dB (line)
• Output: 150mV (line), 30mV (DIN), 1V (Pre out)
• Speaker load impedance: 4Ω (minimum)
• Semiconductors: 3 x FET, 3 x IC, 56 x transistors, 36 x diodes
• Dimensions: 18.9 x 5.51 x 12.6 inches
• Weight: 24.69 lbs
• Accessories: FM T-type antenna
• Year: 1976

KEY FEATURES

• Power Output: 60 watts per channel into 8 ohms
  
• Tone Controls: Bass, Treble, Balance, Loudness
  
• Tuning: Clear, reliable FM and AM reception with dynamic tuning
  
• Design: Classic brushed aluminum faceplate with a walnut veneer finish
  
• VU Meters: Large, easy-to-read meters for accurate signal monitoring
  
• Versatility: Ideal for home stereo systems and vintage audio setups
  
• FM Muting & MPX Noise Filter: Enhanced reception and reduced interference

REFURBISHED

This Pioneer SX850 has undergone a comprehensive restoration to ensure it performs at its peak, preserving the signature Pioneer sound while enhancing its original appearance. The receiver has been completely serviced, and all critical components have been tested, cleaned, and upgraded to restore its audio performance and visual appeal.

1. Fully Serviced

• Brushed aluminum faceplate professionally cleaned and polished
• Knobs, switches, and pushbuttons cleaned and lubricated for smooth operation
• Tone controls (bass, treble, balance, loudness) tested and calibrated to factory specifications
• Speaker terminals cleaned and retensioned for a secure connection
• Headphone output tested for full, clear stereo output
• RCA inputs cleaned and re-tensioned for optimal signal integrity
• Internal chassis cleaned, dusted, and detailed
• Rear panel cleaned, lettering preserved or touched up
• Full warm-white LED upgrade across dial scale, function lamps, stereo indicator

2. Electronic Restoration

• Capacitors replaced across the power supply, preamplifier, tone control, phono stage, and power amplifier sections
• Power rails tested and regulated for stable, reliable output
• DC offset and bias recalibrated to original factory settings
• Transistors tested and replaced where necessary with low-noise equivalents
• Solder joints reflowed in heat-sensitive areas for long-term reliability
• Wood case restored with a premium walnut finish

3. Tuner Section

• FM/AM tuner fully aligned with a precision calibration tool for optimal reception
• FM stereo lock and mute threshold calibrated for high-quality decoding
• Gyro tuning mechanism cleaned and restrung for smooth tuning
• Dial pointer realigned, and dial tracking adjusted for precise tuning

4. Final Testing & QA

• The unit underwent a 2-hour continuous stress test to verify thermal stability, channel balance, and overall performance
• Sound output tested for clarity, balance, and low noise
• All inputs (phono, AUX, tape) tested for noise-free operation and accurate signal handling
• Listening tests performed across all inputs to ensure dynamic, distortion-free audio
• Passed HQaudios’ final quality assurance inspection

5. Result

The Pioneer SX850 now delivers exceptional warmth with a dynamic tonal range, clear output, and a dead-quiet operation. Its reliable performance, coupled with its timeless design, makes it an ideal addition to any vintage audio setup. Restored to its original glory, this receiver is ready to provide decades of high-quality sound.

⚠️ Note: Listing includes receiver with walnut wood case and antennas

SUGGESTED PAIRINGS

Speakers: JBL L100, Klipsch Forte, Pioneer HPM-100

Turntables: Technics SL-1200, Marantz 6100, Dual 1229

Cassette Decks: Pioneer CT-F900, TEAC A-450

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

PACKAGING & SHIPPING:

Secure Packaging:
Each unit is carefully packed using:

• High-density foam inserts with 5-layer corrugated cartons
• Custom EPE foam corners to protect edges
• Double-wall outer box for shock resistance
• Plastic straps + handling labels to ensure safe transit

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 model, but safety and protection are always our top priority.

Thank you for being a valued customer & Thanks for looking!