Pioneer SX-990 Vintage Receiver – Fully Restored- 1-Year Warranty

• Model: Pioneer SX-990
• Type: AM/FM Stereo Receiver
• Protection Plan: 1-Year Warranty Included
• Free Support: Must be used before requesting return
• Packaging: Securely packed, insured, and tracked
• Original Box: Not included
• SKU: 151THLC0406

Pioneer SX-990 Vintage Receiver

ABOUT

The Pioneer SX-990 is a classic early-1970s silver-face receiver, known for its warm, smooth Pioneer sound and beautiful blue tuning dial. This unit has been fully refurbished, fully recapped, and cosmetically restored, bringing it back to excellent operational and visual condition.

It includes a brand-new high-grade MDF wood case with walnut veneer, custom-built to match the original Pioneer aesthetic.

• Model: Pioneer SX-990
• Type: AM/FM Stereo Receiver
• Protection Plan: 1-Year Warranty Included
• Free Support: Must be used before requesting return
• Packaging: Securely packed, insured, and tracked
• Original Box: Not included
• SKU: 151THLC0406

SPECS:

• Tuning range: FM, MW
• Power output: 28 watts per channel into 8Ω (stereo)
• Frequency response: 10Hz to 100kHz
• Total harmonic distortion: 0.5%
• Input sensitivity: 5mV (mic), 3.3mV (MM), 24mV (ceramic), 200mV (line)
• Signal to noise ratio: 80dB (MM), 100dB (line)
• Speaker load impedance: 4Ω to 16Ω
• Semiconductors: 1 x FET, 36 x transistors, 5 x IC, 17 x diodes
• Dimensions: 18.07″ x 5.71″ x 14.53″
• Weight: 25.13 lbs

KEY FEATURES

• Fully refurbished – restored electronically & mechanically

• Fully recapped with audio-grade components

• Silver faceplate detailed and polished

• Strong FM/AM tuner with excellent stereo lock

• Includes new custom wood case (High-grade MDF + walnut veneer)

• Smooth controls, noise-free operation

• Ready for daily listening

REFURBISHED

All work follows HQaudios’ restoration standards for long-term reliability and clean audio performance.

1. RECAPPED – Electrical Restoration

Complete recap performed across all major boards using Nichicon / Panasonic audio-grade capacitors.

Power Supply

• Electrolytic capacitors replaced

• Voltage rails stabilized and tested under load

• Diodes and power resistors inspected, replaced as needed

• All solder joints reflowed to eliminate cold/aged joints

Main Amplifier Board

• Recap of driver and signal capacitors

• Bias and DC offset adjusted to factory specifications

• Transistors checked; noisy or drifting units replaced

• Thermal stability verified during stress test

Preamplifier / Tone Control

• Recapped signal path capacitors for improved clarity

• Deep clean & lubrication of all potentiometers: volume, balance, bass, treble

• Switches (mode, loudness, tape monitor) cleaned and serviced

• Eliminated static, crackling, or channel imbalance

Phono Sections (Phono 1 & 2)

• Recapped and tested for proper gain

• RIAA accuracy restored

• Noise floor optimized for clean vinyl playback

Tuner Assembly

• Key capacitors replaced

• RF/IF alignment performed for strong reception

• Tuning capacitor cleaned

• Stereo lock and signal meters calibrated

2. Lighting System

• All dial and meter lamps replaced

• Even, bright blue illumination across the tuning dial

• Low-heat bulbs protect the light diffuser and faceplate

3. Mechanical & Cosmetic Restoration

• Silver brushed faceplate cleaned and detailed

• Knobs polished to original shine

• Chassis cleaned internally and externally

• RCA jacks and speaker terminals cleaned and tightened

• Includes new custom wood case:

– High-grade MDF core for stability

– Realistic walnut-grain veneer

– Satin protective finish

4. Final Quality Control Testing

Every Pioneer SX-990 passes HQaudios’ multi-stage QC protocol:

• 2–3 hour continuous load test

• AUX, Phono 1/2, and Tape inputs fully tested

• Speaker A/B outputs tested

• Channel balance and frequency sweep verified

• Zero hum, zero hiss, zero crackle

• Heat stability and voltage regulation tested

• Full listening test with music

SUGGESTED PAIRINGS

• KLH Model Six, Advent 5002, Pioneer CS-series

• JBL L26, L36

• Turntables: Pioneer PL-12D, Dual 1219, Technics SL-D2

PACKAGING & SHIPPING

• Includes custom walnut-veneer wood case

• Double-boxed with custom foam protection

• Shock-absorbing packaging

• Ships within 24–48 hours from our U.S. facility

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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.

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