Pioneer SX780 Vintage Receiver

The Pioneer SX780 stands as one of Pioneer’s most well-regarded mid-power stereo receivers from the late 1970s, admired for its musical presentation, clean design, and long-term durability. Featuring a brushed aluminum faceplate paired with classic wood side panels, the SX780 delivers both visual elegance and solid engineering in a timeless form factor.

This unit has been professionally serviced and restored by HQaudios, with a focus on reliability, accurate sound reproduction, and preservation of its original character. Every critical section has been inspected and refreshed to ensure stable operation, allowing the receiver to perform confidently in a modern listening environment while retaining its unmistakable vintage identity. The result is a dependable, great-sounding receiver suited for both daily listening and serious vintage audio collections.

CONDITION: Excellent – Serviced, tested, and cleaned

• MODEL: Pioneer SX780
• TYPE: 2-Channel Stereo Receiver
• PROTECTION PLAN: 1-Year Warranty Included
• FREE SUPPORT: Must be used before requesting return
• SKU: 15TNE0008

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: 5Hz to 80kHz
• Total harmonic distortion: 0.05%
• Damping factor: 30
• Input sensitivity: 2.5mV (MM), 150mV (line)
• Signal to noise ratio: 76dB (MM), 95dB (line)
• Output: 150mV (line)
• Speaker load impedance: 4Ω (minimum)
• Semiconductors: 5 x FWT, 11 x IC, 26 x transistors, 22 x diodes
• Dimensions: 18.9 x 5.51 x 12.6 inches
• Weight: 24.69 lbs

KEY FEATURES

Power Output: 45 watts per channel into 8 ohms

Aesthetic Design: Classic brushed aluminum faceplate with sleek wood side panels

Tone Controls: Bass, Treble, Balance, Loudness for precise sound customization

Tuning: Clear, reliable AM/FM stereo tuning with signal strength meters

Connectivity: Phono, Tape, and AUX inputs for versatile usage

Durability: Heavy-duty construction designed to last

Speaker Options: A and B speaker connections for flexible setup

REFURBISHED

This Pioneer SX780 has undergone a careful, methodical restoration process to return it to dependable operating condition while respecting its original design and sonic signature. All essential components were serviced, tested, and adjusted to ensure clean audio output, smooth operation, and long-term stability.

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

2. Electronic Restoration

• Capacitors replaced in key sections including the power supply, preamp, tone control, phono stage, and power amplifier
• Power rails measured and regulated to maintain consistent voltage under load
• DC offset and bias adjusted to factory specifications for stable amplifier operation
• Weak or noisy transistors replaced with reliable low-noise equivalents where required
• Heat-stressed solder joints reflowed to improve long-term reliability
• Wood cabinet restored and finished in a classic walnut tone, complementing the receiver’s vintage appearance

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

TFollowing restoration, the Pioneer SX780 delivers the smooth, balanced sound that made this model a classic. The receiver now operates quietly, maintains stable performance, and presents a clean, well-preserved exterior. With its refreshed electronics and carefully restored cosmetics, this SX780 is ready to provide years of reliable listening while preserving the authentic Pioneer sound that vintage enthusiasts value.

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!