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Sansui QRX-8001 Vintage Quadraphonic Receiver – Professionally Restored – 1-Year WarrantyCondition: Tested, serviced and restored – Excellent working condition. With over 2,000 fully serviced and certified vintage receivers, amplifiers, tape decks, and speakers delivered, HQAudios stands as one of the most reputable sources for professionally restored vintage audio equipment. Please scroll down to view the complete description.1/ ABOUTThis listing is for a Sansui QRX-8001 vintage quadraphonic receiver, professionally inspected, serviced, and tested by HQaudios.This unit has been prepared for reliable daily use while preserving the warm, musical vintage sound that makes classic Sansui receivers highly desirable among collectors and audiophiles.The receiver has been fully tested under real listening conditions and is ready to be enjoyed with your favorite speakers, turntable, tape deck, or other compatible audio sources.2/ KEY HIGHLIGHTS• Professionally inspected and serviced by HQAudios technicians. • Fully tested for clean, stable, and reliable operation. • Legendary Sansui four-channel receiver with QS/SQ quadraphonic decoding. • Powerful four-channel amplifier design. • All major functions tested before shipment. • Controls cleaned and treated for smooth operation. • Carefully packed for safe worldwide delivery. • Backed by our 1-Year HQAudios Warranty.3/ SPECIFICATIONSBrand: SansuiModel: QRX-8001Type: Vintage Quadraphonic ReceiverPower Output: 40 Watts per channel × 4 into 8 ohms; 100 Watts per channel × 2 into 8 ohms in 2-Channel Power ×2 modeInputs: Phono, Aux, Tape PlayBuilt-In Tuner: AM/FMDimensions: Approx. 23.6 × 6.9 × 16.3 inches (W × H × D)Weight: Approx. 52.0 lbs (23.6 kg)Condition: Restored / Serviced / TestedWarranty: 1-Year HQAudios Warranty4/ SOUND CHARACTERThe Sansui QRX-8001 delivers the unmistakable Sansui sound with exceptional warmth, authority, and impressive spatial presentation. Its rich midrange, smooth extended highs, and deep, controlled bass create an engaging listening experience that excels in both conventional stereo and immersive quadraphonic playback.The advanced QS and SQ decoding system reproduces four-channel recordings with remarkable realism, while the powerful amplifier section maintains excellent channel separation, dynamic headroom, and precise imaging. Whether paired with vintage Sansui speakers or modern high-efficiency loudspeakers, the QRX-8001 offers an expansive, highly musical presentation that remains one of the finest examples of vintage quadraphonic audio engineering.5/ COSMETIC CONDITIONThe receiver is in excellent vintage cosmetic condition with only light signs of age consistent with careful ownership. The brushed aluminum faceplate, original knobs, switches, and illuminated dial have been professionally cleaned and detailed while preserving the receiver's authentic vintage appearance. Please review all photos carefully, as they are part of the description.• Faceplate: Excellent condition with clean brushed aluminum finish and crisp original lettering. • Knobs and switches: Original Sansui controls in excellent condition with smooth, precise operation. • Cabinet / case: Well-preserved cabinet with minimal signs of normal vintage use. • Dial glass / meter / lamps: Clean dial glass with bright illumination and fully functional meters. • Rear panel: Clean, complete, and well maintained with all input/output connectors and speaker terminals in excellent condition.6/ HQAUDIOS RESTORATION & TESTING PROCESSBefore Restoration• After decades of service, the Sansui QRX-8001's power supply, four-channel amplifier section, FM/AM tuner, QS/SQ/CD-4 quadraphonic decoding circuitry, preamplifier circuits, input selector, volume and tone controls, switches, relays, and illuminated dial system require careful inspection before restoration begins.• For this QRX-8001, HQaudios places particular attention on the condition of the power supply, four-channel output stage, protection circuit, quadraphonic decoder boards, tuner section, controls, switches, potentiometers, speaker terminals, RCA input/output connections, and internal wiring. These components are critical to long-term reliability, channel balance, and authentic quadraphonic performance.• The amplifier circuits, tuner alignment, QS/SQ decoding circuits, signal path, dial illumination, meters, and front-panel controls are also carefully evaluated to determine the receiver's overall operating condition before restoration starts.During Restoration• Based on the inspection results, this QRX-8001 was restored according to HQaudios' technical standards while preserving the engineering and performance characteristics that have made this model one of Sansui's most respected quadraphonic receivers.• The power amplifier and preamplifier sections were professionally cleaned and serviced. Controls, switches, relays, and connectors were carefully cleaned to eliminate noise and ensure smooth operation.• The power supply, amplifier circuits, protection circuitry, and signal path were inspected and serviced as documented during restoration. Selected transistors and resistors within the signal path were also replaced to improve long-term reliability, reduce noise, and maintain the receiver's original operating characteristics.• FM/AM tuner performance, QS/SQ quadraphonic decoding, channel balance, input selection, speaker outputs, tone controls, protection circuitry, and all front-panel functions were tested and calibrated to restore dependable operation.• After the technical restoration was completed, the exterior was professionally cleaned and detailed to preserve the QRX-8001's original appearance while respecting the authentic character of vintage Sansui equipment.After Restoration• Once restoration had been completed, this QRX-8001 underwent comprehensive functional testing under real operating conditions.• Amplifier performance, quadraphonic decoding, tuner reception, channel balance, output power, protection circuitry, meter response, dial illumination, and all audio inputs and outputs were thoroughly tested to ensure the receiver performed as originally designed.• Finally, the unit underwent several hours of continuous listening tests through a complete vintage quadraphonic audio system to evaluate sound quality, operational stability, four-channel imaging, and overall real-world performance.• Only after successfully meeting HQaudios' restoration and testing standards was the Sansui QRX-8001 approved and prepared for its next owner.7/ VIDEO TEST & SOUND DEMOPlease contact us directly if you would like to hear a video test of this unit before purchase.We are happy to provide additional video, sound demo, or photos upon request.8/ SUGGESTED PAIRINGThe Sansui QRX-8001 works beautifully with a wide range of restored vintage quadraphonic systems.Classic Sansui Quadraphonic System Sansui SR-838 Turntable Sansui SP-5500X Speakers (Front) Sansui SP-3500 Speakers (Rear)Sansui Tape System Sansui SC-3110 Cassette Deck Yamaha NS-1000M SpeakersQuadraphonic Analog System Pioneer RT-909 Reel-to-Reel Tape Deck JBL L112 SpeakersWest Coast Monitor System TEAC X-1000R Reel-to-Reel Tape Deck JBL 4312 Control MonitorsHigh-End Vintage System McIntosh C28 Preamplifier Altec Model 19 SpeakersBritish-Style System Thorens TD-160 Turntable Tannoy Berkeley SpeakersFor the best result, connect the QRX-8001 to properly matched speakers using quality speaker cable and pair it with well-maintained vintage source components for optimum performance.9/ COMBO DISCOUNTSave $100 when purchasing this receiver together with a qualifying pair of speakers or another restored vintage audio component from HQAudios.Please contact us before purchase so we can confirm availability and prepare a combined offer.10/ TRADE-IN PROGRAMIf you have vintage audio equipment such as receivers, amplifiers, speakers, cassette decks, or reel-to-reel tape decks and would like to upgrade to a restored unit, please contact us.HQAudios may accept trade-ins toward your purchase depending on the item, condition, and shipping location.11/ SHIPPING & PACKAGINGThis receiver will be professionally packed by HQAudios for safe delivery. Vintage receivers are heavy and delicate, so we take extra care to protect the faceplate, knobs, corners, rear terminals, and internal structure during shipment.• Carefully wrapped and protected. • Heavy-duty box and protective packing materials used. • Extra protection around faceplate, knobs, and corners. • Tracking provided after shipment. • Signature may be required for delivery.12/ 1-YEAR HQAUDIOS WARRANTYThis unit is backed by our 1-Year HQAudios Warranty covering normal-use functionality related to the service work performed by HQAudios.If you experience an issue, plea
The QRX-8001 is a real collector’s piece, but US$2,999 is a very ambitious ask for a used unit unless it’s been fully sorted, documented, and exceptionally clean. Recent market evidence points more toward roughly US$800 to US$1,250 for restored examples, with even a notably strong US$2,395.95 sale still below this listing, so this price sits above the usual top end.
What makes it worthwhile is the sound and the rarity: Sansui’s quad receivers have a big, muscular presentation, strong build quality, and real appeal to vintage hi-fi fans who want something distinctive. A fully serviced example with proven original cosmetics, correct knobs, and working quad logic can justify a premium, but at this level you’d want serious proof of restoration, no functional issues, and complete accessories before considering it.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Sansui, a pioneering Japanese audio brand, traces its origins to 1947 when it was founded in Tokyo by brothers Sakurai and Shunichi Yamamoto. Emerging from post-war Japan, the company quickly established itself as an innovator in consumer electronics, leveraging precision engineering to craft components that rivaled Western counterparts. Its heritage is rooted in the golden era of hi-fi, where Sansui's commitment to sonic purity helped define Japan's rise as a global audio powerhouse.
The brand excelled in a broad spectrum of hi-fi categories, with particular renown for its integrated amplifiers, receivers, and tuners that delivered warm, dynamic sound. Sansui also produced acclaimed speakers, turntables, cassette decks, and later digital converters, emphasizing robust build quality and innovative features like direct-coupled circuitry for low distortion. These products catered to audiophiles seeking balanced performance across analog and early digital domains.
Today, Sansui holds a cherished position in the vintage collector market, revered for its mid-to-high-end gear from the 1970s and 1980s—icons like the AU-series amps remain sought after for their musicality and reliability. While no longer a frontline manufacturer, its legacy endures among discerning buyers restoring classics or hunting timeless performers, blending nostalgia with enduring value.
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