Pioneer SX-780 Stereo Receiver – Fully Recapped, Cleaned & Recapped – 1-Year Warranty

• MODEL: Pioneer SX-780
• TYPE: Stereo Receiver
• PLAN PROTECTION: 1-Year Warranty Included
• FREE SUPPORT: Must be used before requesting return
• SKU: 151THLC0405

Pioneer SX-780 Stereo Receiver

ABOUT

The Pioneer SX-780 is one of the most popular and best-sounding mid-range receivers of the late 1970s. Known for its clean silver-face design, strong tuner section, and warm Pioneer sound signature, it remains a favorite among collectors and music lovers.

This unit is in excellent condition, fully refurbished from the inside out, and comes with a brand-new custom wood case, giving it a premium, showroom-grade appearance.

• MODEL: Pioneer SX-780
• TYPE: Stereo Receiver
• PLAN PROTECTION: 1-Year Warranty Included
• FREE SUPPORT: Must be used before requesting return
• SKU: 151THLC0405

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″ × 5.5″ × 12.6″
• Weight: 24.69 lbs

KEY FEATURES

• Excellent condition silver faceplate

• Fully refurbished and fully serviced

• New custom wood case included

• All bulbs/lamps replaced

• Smooth controls, stable tuner section

• Ready for daily use

REFURBISHED – FULL RESTORATION

All restoration work is performed following HQaudios’ professional refurbishment standards.

1. RECAPPED – Electrical Restoration

• Power supply board recapped with high-grade Nichicon/Panasonic capacitors

• Stabilized DC rails and checked for proper voltage under load

• Driver section serviced and brought back to factory specification

• Testing of all transistors; weak or noisy components replaced

• Known Pioneer SX-780 regulator issues addressed and corrected

• Protection relay inspected and cleaned

• All RCA jacks, switches, and terminals cleaned and tightened

2. Control System & Signal Path Restoration

• All potentiometers (volume, balance, bass, treble) deep-cleaned and lubricated

• All push-switches (loudness, hi filter, function selectors) serviced

• Complete elimination of static, crackle, or intermittent channel dropouts

• Tone board inspected and cleaned for proper frequency response

3. Tuner Section Service

• FM/AM tuner cleaned and aligned

• Tuning capacitor serviced

• Stereo lock, signal strength, and meter accuracy verified

• Excellent sensitivity and stable FM performance

4. Lighting System – Complete Replacement

• New dial lamps, meter lamps, and indicator lamps installed

• Even illumination across the tuning dial

• Low-heat technology to protect the light diffusers and faceplate

5. Mechanical & Cosmetic Work

• Silver brushed-aluminum faceplate cleaned and detailed

• Knobs polished to original sheen

• Chassis cleaned inside and out

• Power cord cleaned and dressed

• Brand-new custom wood case installed — premium walnut veneer finish, clean lines, proper ventilation

6. Final Quality Control Testing

Every SX-780 undergoes HQaudios’ multi-stage QC process:

• 2–3 hour continuous power-on stress test

• All inputs (AUX, Phono, Tape) tested

• Output tested on Speaker A & B

• Channel balance and gain verified

• No hum, no hiss, no pops

• Heat and voltage stability confirmed

• FM tuner alignment checked

• Full listening test on music for tonal accuracy

SUGGESTED PAIRINGS

• JBL L26, L36, L50

• Klipsch Heresy / RP-600M

• Advent / KLH vintage bookshelf speakers

• Pioneer PL-518, PL-530, Technics SL-D2 turntables

PACKAGING & SHIPPING

• Includes brand-new wood case

• Double-boxed with custom foam support

• Shock-resistant packaging

• Ships within 24–48 hours from our US warehouse

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Thank you for viewing our listing! Please kindly ensure you read all the information provided 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 include 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 manner.

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!