The Pioneer SX780 is a classic stereo receiver that blends performance, aesthetics, and durability, making it a beloved piece among audiophiles and collectors. With a sleek brushed aluminum faceplate, wooden side panels, and robust audio output, this receiver is built to provide exceptional sound quality and reliability.
Now, this Pioneer SX780 has been professionally serviced and restored by HQaudios to bring it back to its original glory, delivering the iconic Pioneer sound with modern reliability. The unit has undergone extensive repairs and upgrades, ensuring long-term performance and retaining its vintage appeal. Perfect for anyone looking to enhance their audio setup with a dependable, high-quality vintage receiver.

  • 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: 151TOSH0009
Customer Service:
Once your item arrives, if you have questions about how your item functions or proper settings, please CONTACT US.
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“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


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

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

This Pioneer SX-780 has been carefully serviced and refreshed to ensure stable operation, reliable performance, and a clean vintage presentation while preserving its original character.

1. Fully Serviced

  • Brushed and anode black aluminum faceplate carefully cleaned and polished while preserving original lettering

  • Knobs, switches, and pushbuttons cleaned with professional contact solution

  • All function selectors and speaker switches serviced to eliminate oxidation

  • Tone controls (bass, treble, balance, loudness) tested for proper response

  • Speaker terminals cleaned for secure and stable connection

  • Headphone output tested for clear, balanced stereo signal

  • RCA inputs cleaned to ensure stable signal integrity

  • Internal chassis cleaned and dust removed

  • Rear panel cleaned with original lettering preserved

  • All 8V dial lamps replaced to restore proper illumination

  • FM Stereo indicator lamp replaced for accurate stereo lock display

2. Electronic Inspection & Stability Check

  • Power supply inspected for stable voltage delivery

  • Output stage tested for proper channel balance

  • DC offset measured and confirmed within safe operating range

  • Heat-stressed solder joints inspected and reflowed where necessary

  • Signal path tested for clean, distortion-free operation

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 SX-780 now delivers warm, balanced, and stable stereo performance with properly restored dial illumination and a fully functional FM stereo indicator. All controls operate smoothly and reliably, providing clean signal flow and dependable daily listening while preserving its classic vintage character and timeless Pioneer design.


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.

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.


 
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HQaudios

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BY BUYING FROM HQaudios YOU AGREE TO CONTACT US DIRECTLY BEFORE LEAVING LESS THAN POSITIVE FEEDBACK, ANY RATING LESS THAN 5, OR STARTING A RETURN!

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Shipping Policy: This is for local pickup or we will ship it very carefully so that it arrives in good shape like it is now.

We provide shipping to the contiguous 48 United States, on most items. Shipping fees to ALL OTHER LOCATIONS will be calculated individually and added to customer invoices. HQaudios is also not responsible for any taxes, local duties, or fees outside of the USA and those are not included in the sale price or ship charge. In the event that the customer refuses a shipment, all shipping costs to and from the country or State in which the item was shipped to are not refunded. Please note, in some cases return shipping can cost as much as double the original ship cost.

All shipments are processed within 03 business days of payment, whenever possible. In the event of stock issues causing a delay, customers will be promptly notified, and alternative shipment arrangements will be made. Customers are responsible for any charges incurred due to failed delivery attempts or re-delivery.

Our customers' satisfaction means everything to us. Once you get this item, feel free to contact us if it has any problems! I will try to answer any questions that you may have in a timely fashion.

Return Policy: FREE SUPPORT SERVICE MUST BE UTILIZED BEFORE REQUESTING ANY RETURN, FOR ANY REASON. Items may be exchanged within 30 days if defective or not as described, with a full refund of the purchase price if an exchange is unavailable. If due to seller error, we will issue a prepaid return label or arrange for reimbursement of return shipping expenses as per this policy, not exceeding the original shipping cost. The address for returning shipment: 10851 Capital Ave, Garden Grove CA 92843 Returned items may require inspection before determining fault. The item must be received in its original, unaltered condition with all original packaging. Electronic items cannot be opened or tampered with; sealed items must remain sealed, and "Excellent" items must remain in "Excellent" condition. No returns will be accepted without first contacting us for Free Support, troubleshooting, or evaluation.

Warranty Policy: The warranty covers technical parts for up to 12 months from the date of receipt, provided there is valid evidence and the item remains sealed, unaltered, and has not been disassembled or internally inspected/repaired. Please note that shipping costs for warranty service will be the seller's responsibility if the item is found to be defective.

⚠ Important Notice: To ensure a smooth warranty process, we kindly request that you record a video while unboxing your package upon delivery. Any claims related to product damage or warranty service must be supported by clear video and photographic evidence. Please submit all required documentation to the official HQaudios email for prompt assistance.
***Failure to provide sufficient information as per our guidelines may result in the rejection of your request

⚠ For high-value products: Due to the nature of these products, we prioritize fast processing for orders from eBay account holders who have been established for at least 3 years, with a successful transaction rate and feedback score of 99% or higher. For other cases, we will carefully consider the order and proactively contact the buyer to provide prompt support.

For full policy details, please visit our ABOUT US page.

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From HQaudios Team!