Pioneer SX-550 Stereo Receiver

The Pioneer SX-550 is a vintage stereo receiver that captures the best of 1970s audio technology. With its sleek brushed aluminum faceplate and real wood veneer side panels, the SX-550 offers a classic design and outstanding audio performance. It is widely admired for its warm sound and reliable operation, making it a favorite among collectors and audiophiles alike.

This particular Pioneer SX-550 has undergone a thorough restoration and service by the team at HQaudios. It has been carefully cleaned, tested, and upgraded to ensure that it not only performs at its peak but also retains the vintage appeal that makes it so desirable. Whether you’re a seasoned audiophile or new to vintage audio, the SX-550 is a perfect addition to any system.

• Model: Pioneer SX-550
• Type: 2-Channel Stereo Receiver
• Protection Plan: 1-Year Warranty Included
• Free Support: Must be used before requesting return
• ACCESSORIES: Walnut Wood case
• SKU: 15TTE0173

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: 20 watts per channel into 8Ω (stereo)
• Frequency response: 10Hz to 60kHz
• Total harmonic distortion: 0.3%
• Damping factor: 25
• Input sensitivity: 7.5mV (mic), 2.5mV (MM), 150mV (DIN), 150mV (line)
• Signal to noise ratio: 70dB (MM), 90dB (line)
• Output: 150mV (line), 30mV (DIN)
• Speaker load impedance: 4Ω (minimum)
• Semiconductors: 3 x FET, 5 x IC, 28 x transistors, 21 x diodes
• Dimensions: 17.64 x 5.55 x 12.09 inches
• Weight: 20.72 lbs
• Year: 1976

KEY FEATURES

• Power Output: 20 watts per channel at 8 ohms for clear, powerful sound
• Design: Classic brushed aluminum faceplate with real wood veneer side panels
• Tone Controls: Bass, Treble, and Balance for easy sound customization
• Tuning: Reliable AM/FM tuning with signal strength meters for easy station locking
• Connectivity: Phono, Tape, and AUX inputs for versatile listening options
• Durability: Built to last with high-quality materials and construction
• Speaker Options: A and B speaker connections for flexible setup

REFURBISHED

The Pioneer SX-550 has undergone a complete professional restoration by HQaudios, bringing it back to factory specifications while enhancing its aesthetic and functionality. Every function has been carefully tested and serviced to ensure long-lasting performance, all while maintaining the classic Pioneer charm with modern upgrades.

1. Fully Serviced

• Brushed aluminum faceplate professionally cleaned and polished
• Faceplate anodized in black for a bold, modern look with laser-etched lettering and inked accents, ensuring durability and long-lasting clarity
• Knobs, switches, and pushbuttons cleaned and lubricated for smooth, noise-free operation
• Tone controls (bass, treble, balance) tested and calibrated to factory specifications
• Speaker terminals cleaned and re-tensioned for optimal connection
• Headphone output tested for clear, balanced stereo performance
• RCA inputs cleaned and re-tensioned for optimal signal integrity
• Internal chassis cleaned, dusted, and detailed
• Rear panel cleaned, preserving original lettering and touching up where necessary

2. Electronic Restoration

• Capacitors replaced across the power supply, preamplifier, tone control, and power amplifier sections
• Power rails tested and regulated for stable, reliable output
• Bias and DC offset adjusted to original factory settings
• Transistors tested and replaced with low-noise equivalents
• Solder joints reflowed in heat-sensitive areas for long-term reliability

3. Signal Path & Connectivity

• RCA jacks and speaker terminals cleaned and secured
• Phono stage tested for correct gain and low noise performance
• Headphone output tested for clear, distortion-free audio

4. Tuner & Meter System

• FM/AM tuner fully aligned and calibrated for stable reception
• Signal strength and tuning meters calibrated for accuracy
• Dial and meter illumination restored for consistent brightness

5. Final Testing & Quality Control

• Extended burn-in period and real-world listening tests
• All inputs and outputs tested for full functionality
• Channel balance and dynamics verified
• Thermal stability confirmed through extended operation

While the Pioneer SX-550 has been professionally restored, the faceplate now features a modern black anodized finish with laser-etched accents, offering a fresh, bold look that enhances the unit’s vintage charm. The front panel does show some minor signs of age, including scratches, but these do not affect the functionality of the receiver. It has been restored to factory performance levels and will continue to provide impeccable audio performance and reliability for many years.

SUGGESTED PAIRINGS

• Speakers: JBL L26, Klipsch Heresy, Pioneer HPM-60
• Turntables: Technics SL-1200, Dual 1219, Thorens TD-160
• Cassette Decks: TEAC A-2300, Pioneer CT-F900, Akai GX-747

🎁 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.