Pioneer SX-680 Stereo Receiver – Pro Serviced & Fully Restored – 1-Year Warranty

Condition: Very Good – Professionally serviced, thoroughly tested, and ready to enjoy. The receiver has been carefully restored, with light signs of usage, including minor surface scratches, which do not affect its functionality.

With over 2,000 fully serviced and certified vintage receivers/speakers delivered, HQaudios stands as one of the most reputable sources for high-quality audio units.

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ABOUT

The Pioneer SX-680 is a classic vintage stereo receiver that brings together exceptional sound quality, timeless design, and robust functionality. Released in the 1970s, this receiver offers powerful performance, making it a popular choice for audiophiles and collectors alike. It features a distinctive brushed aluminum faceplate, wood veneer side panels, and high-quality internals that ensure clear, reliable sound.

Now, this Pioneer SX-680 has undergone full professional servicing, testing, and restoration to restore its original performance and aesthetic appeal. It is ready to deliver the signature Pioneer sound while remaining a solid addition to your vintage audio collection.

• Model: Pioneer SX-680
• Type: 2-Channel Stereo Receiver
• Protection Plan: 1-Year Warranty Included
• Free Support: Must be used before requesting return
• Accessories: Walnut Wood case
• SKU: 15JKE4424

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: 30 watts per channel into 8Ω (stereo)
• Frequency response: 5Hz to 100kHz
• Total harmonic distortion: 0.1%
• Damping factor: 25
• Input sensitivity: 2.5mV (MM), 150mV (line)
• Signal to noise ratio: 75dB (MM), 90dB (line)
• Output: 150mV (line)
• Speaker load impedance: 4Ω (minimum)
• Dimensions: 17.13 x 5.69 x 12.36 inches
• Weight: 19.62 lbs

KEY FEATURES

• Power Output: 35 watts per channel at 8 ohms
• Tone Controls: Bass, Treble, Balance, Loudness for easy sound adjustments
• Tuning: AM/FM stereo tuner with clear signal strength meters
• Connectivity: Phono, Tape, and AUX inputs for versatile audio sources
• Design: Brushed aluminum faceplate with walnut wood veneer side panels
• Durability: Built with quality materials to last through the years
• Speaker Options: A and B speaker connections for flexible setup

REFURBISHED

This Pioneer SX-680 has been professionally restored by HQaudios to ensure reliable performance, long-term stability, and preserved vintage aesthetics. While maintaining its original character, this unit has undergone detailed servicing and precision calibration to deliver clean, stable, and musical sound.

Fully Serviced

• Brushed aluminum faceplate carefully cleaned and polished while preserving original lettering
• All knobs, switches, and pushbuttons removed, cleaned with contact cleaner, and lubricated for smooth, noise-free operation
• Bass, treble, balance, and loudness controls tested and recalibrated for accurate response
• Speaker terminals cleaned and re-tensioned to ensure solid and secure connections
• Headphone output tested for clear, full stereo performance
• RCA inputs cleaned and tightened for optimal signal transfer
• Internal chassis fully dusted and detailed to improve airflow and long-term reliability

Electronic Restoration

• Capacitors replaced where necessary in the power supply, tone control, preamp, and power amplifier sections
• Power rails inspected and stabilized to ensure consistent voltage delivery
• DC offset and bias precisely adjusted to factory-safe operating specifications
• Output transistors tested and replaced where required with reliable low-noise equivalents
• Heat-stressed solder joints inspected and reflowed to reinforce long-term durability

Signal Path & Connectivity

• Signal path inspected and optimized for clean, low-noise performance
• Phono stage tested for proper gain structure and minimal background noise
• AUX and Tape Monitor inputs verified for stable, distortion-free playback
• Channel balance confirmed for symmetrical stereo imaging

Tuner & Meter System

• FM/AM tuner section tested for stable reception and stereo lock performance
• Tuning indicator and signal strength meters verified for accurate operation
• Dial illumination restored for even brightness and classic visual presentation

Final Testing & Quality Control

• Extended burn-in testing performed under load to confirm thermal stability
• All functions, switches, and inputs verified for full operational integrity
• Listening tests conducted to evaluate clarity, dynamics, channel balance, and tonal accuracy
• Unit monitored for noise floor consistency and distortion-free output

RESULT

The Pioneer SX-680 now delivers the smooth, warm, and dynamic Pioneer sound it is known for. With stable output, clean stereo imaging, and reliable performance, this receiver is ready for daily listening or integration into a vintage hi-fi system. Its classic silver face, black control panel, and wood cabinet remain visually timeless while offering dependable performance for years to come.

SUGGESTED PAIRINGS

• Speakers: JBL L26, KLH Model 17, Pioneer HPM-60
• Turntables: Technics SL-1200, Dual 1219, Thorens TD-160
• Cassette Decks: Pioneer CT-F900, TEAC A-2300, 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.

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Thank you for viewing our listing! Please kindly ensure you read all the provided information carefully!

We strive to describe all items honestly and accurately. However, as human beings, we may occasionally make mistakes. If you have any doubts or encounter conflicting information, please inquire before purchasing or making an offer.

We kindly request that all buyers give us the opportunity to address any issues.

Payment Policy:

All buyers are required to make immediate payment or contact us within 24 hours to arrange payment, with payment received within 3 days. Offers submitted under the Best Offer feature are considered binding agreements and require immediate payment upon acceptance. Failure to adhere to these terms may result in substitution or cancellation of the transaction.

Payments must be accompanied by a valid shipping address listed as Confirmed. Payments with invalid shipping addresses will be refunded and may incur a processing fee deducted from the refund amount. 

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. 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.

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.

Return Policy:

Our 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 "Mint" items must remain in "Mint" 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.

If you have any issues or dissatisfaction with our services, products, or policies, please refrain from leaving negative feedback immediately. Instead, contact us right away so we can provide you with the best possible solution and have the opportunity to improve our service quality!

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