{"title":"Second Hand Quad Hi-Fi","description":"\u003cp\u003eUsed Quad power amplifiers, preamps, tuners and speakers, from the 303 and 405 to the 34, 44 and FM4. Every item tested and graded. Free UK delivery.\u003c\/p\u003e","products":[{"product_id":"quad-405-power-amplifier-excellent","title":"Quad 405 - Power Amplifier - Excellent","description":"\u003ch3\u003eCondition details\u003c\/h3\u003e\n\u003cp\u003eThis power amplifier is in excellent condition throughout, showcasing remarkable preservation for a second-hand unit. The cosmetic surface condition presents beautifully with no significant wear or damage visible, while the structural integrity remains completely sound and uncompromised. The unit maintains excellent cleanliness standards\u003c\/p\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cp\u003eThis listing includes the Quad 405 Power Amplifier unit only, with no additional accessories provided. While accessories are not included, the amplifier itself represents the complete core component needed to experience Quad's renowned audio engineering excellence.\u003c\/p\u003e\n\u003ch3\u003eAbout the item\u003c\/h3\u003e\n\u003cp\u003eThe Quad 405 Power Amplifier represents a legendary chapter in British hi-fi history, renowned for its innovative current dumping topology that delivered exceptional audio clarity with minimal distortion. Quad's reputation for uncompromising audio fidelity has made their amplifiers highly sought after by audiophiles, recording professionals, and discerning music enthusiasts who demand transparent, natural sound reproduction. This particular model earned widespread acclaim for its ability to handle demanding speaker loads while maintaining the musical integrity that made Quad a cornerstone of high-end audio systems worldwide.\u003c\/p\u003e\n\u003cp\u003eThis represents an excellent opportunity to acquire a classic Quad amplifier in exceptional condition, offering both historical significance and enduring audio performance at an attractive value.\u003c\/p\u003e","brand":"Quad","offers":[{"title":"Default Title","offer_id":53082607485265,"sku":"LIT-1-C-2-3-1-vihigcut","price":285.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/6913\/0833\/files\/trimmed-lead-10646709829969.jpg?v=1787688110"},{"product_id":"quad-44-control-unit-good","title":"Quad 44 - Control Unit - Good","description":"\u003ch3\u003eCondition details\u003c\/h3\u003e\n\u003cp\u003eThis item is in good condition, presenting beautifully with excellent surface condition and structural integrity that speaks to its quality construction. The unit maintains good cleanliness with only minor signs of use that are typical for a vintage audio component of this caliber. The excellent cosmetic presentation suggests this unit has been well-maintained throughout its life.\u003c\/p\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cp\u003eThis listing includes the Quad 44 Control Unit only, with no additional accessories provided. The unit itself represents the core component you need to experience Quad's renowned audio engineering and build quality.\u003c\/p\u003e\n\u003ch3\u003eAbout the item\u003c\/h3\u003e\n\u003cp\u003eThe Quad 44 Control Unit represents a cornerstone of British hi-fi engineering, coming from a manufacturer with decades of reputation for creating reference-quality audio components that have graced countless high-end systems. This preamp control unit is highly sought after by audiophiles and vintage audio enthusiasts who appreciate Quad's meticulous attention to sonic accuracy and build quality. The 44 series has earned its place as a classic among serious music listeners who demand transparent, musical reproduction from their source components.\u003c\/p\u003e\n\u003cp\u003eThis represents an excellent opportunity to acquire a respected piece of British audio heritage in good condition at an attractive price point.\u003c\/p\u003e","brand":"Quad","offers":[{"title":"Default Title","offer_id":53082608304465,"sku":"LIT-1-C-3-5-2-foucizxur","price":395.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/6913\/0833\/files\/20260218_140328.jpg?v=1771423998"},{"product_id":"quad-405-power-amplifiers-good-w-original-box","title":"Quad 405 - Power Amplifier - Good w\/ Original Box","description":"\u003ch3\u003eWhy this one\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eGood condition - clearly used but works as it should\u003c\/li\u003e\n  \u003cli\u003eFully tested - all applicable functions verified working\u003c\/li\u003e\n  \u003cli\u003ePatented current-dumping circuit delivers 100W per channel with under 0.01% THD.\u003c\/li\u003e\n  \u003cli\u003eComes in its original box - a rare find for a classic amplifier of this age.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCondition: Good\u003c\/h3\u003e\n\u003cp\u003eThis power amplifier is in good condition. It has passed our 8-point functional test, with 2 item(s) not applicable to this unit. Please review all photos carefully, as they provide an accurate representation of the cosmetic condition of the product.\u003c\/p\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eQuad 405\u003c\/li\u003e\n  \u003cli\u003eOriginal Box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAbout this model\u003c\/h3\u003e\n\u003cp\u003eThe Quad 405 is a stereo power amplifier built around Quad's patented current-dumping topology - an elegant circuit combining a low-powered Class A stage that maintains continuous speaker control with a high-powered section that cuts in only when high-amplitude signals demand it. The result is 100 watts per channel into 8-ohm loads with vanishingly low distortion: less than 0.01% THD at 1 kHz and less than 0.05% at 10 kHz, alongside a signal-to-noise ratio of 95 dB. Frequency response is flat across the audible range, rolling off only at the extremes. The amplifier is unconditionally stable with speaker loads between 4 Ω and 16 Ω and requires no internal adjustments. An internal power limiter can reduce output to 50 watts for use with lower-power speakers, including Quad's own electrostatic models. Connections are via a 4-pin DIN input and spring-loaded speaker terminals.\u003c\/p\u003e\n\u003cp\u003eA great opportunity to own a Quad 405 at this price point.\u003c\/p\u003e","brand":"Quad","offers":[{"title":"Default Title","offer_id":53963109433681,"sku":null,"price":189.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/6913\/0833\/files\/bbcdc9ce859a65d1a427d58f7aa270f3.jpg?v=1787859827"},{"product_id":"quad-303-power-amplifier-good","title":"Quad 303 - Power Amplifier - Good","description":"\u003ch3\u003eWhy this one\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eGood condition - clearly used but works as it should\u003c\/li\u003e\n  \u003cli\u003eFully tested - all applicable functions verified working\u003c\/li\u003e\n  \u003cli\u003eLegendary Class AB design with under 0.002% THD and 10A output current capability.\u003c\/li\u003e\n  \u003cli\u003eA 50W-per-channel amplifier at a significant saving over the new retail price.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCondition: Good\u003c\/h3\u003e\n\u003cp\u003eThis power amplifier is in good condition. It has passed our 8-point functional test, with 2 item(s) not applicable to this unit. Please review all photos carefully, as they provide an accurate representation of the cosmetic condition of the product.\u003c\/p\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eQuad 303\u003c\/li\u003e\n  \u003cli\u003eNo additional accessories included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAbout this model\u003c\/h3\u003e\n\u003cp\u003eThe Quad 303 is a stereo power amplifier built around a fully complementary, symmetrical Triples Output Stage running in Class AB, paired with a custom 200VA toroidal transformer. It delivers 50W per channel into 8 ohms or 70W per channel into 4 ohms in stereo mode, and can be bridged to produce 140W into 8 ohms or 170W into 4 ohms. Total harmonic distortion is kept to under 0.002% at 1kHz, while a maximum output current of 10A means it handles demanding loads - including electrostatic speakers - with ease. Connectivity includes both RCA and XLR line inputs, stereo speaker binding posts, and 12V trigger I\/O for system integration. The design traces its lineage to the original 1967 circuit that earned a 1969 Council of Industrial Design Award, updated here with modern components and robust protection against output shorting, overdriving, and disconnection.\u003c\/p\u003e\n\u003cp\u003eA great opportunity to own a Quad 303 at this price point.\u003c\/p\u003e","brand":"Quad","offers":[{"title":"Default Title","offer_id":54720869400913,"sku":null,"price":155.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/6913\/0833\/files\/d137ef85-5e31-4a86-9812-f789573bb704.jpg?v=1787927024"},{"product_id":"quad-44-hi-fi-amplifier-good","title":"Quad 44 - Hi-Fi Amplifier - Good","description":"\u003ch3\u003eWhy this one\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eGood condition - clearly used but works as it should\u003c\/li\u003e\n  \u003cli\u003eFully tested - all applicable functions verified working\u003c\/li\u003e\n  \u003cli\u003eModular design, 0.05% THD, and 86dB SNR - a technically refined British preamp.\u003c\/li\u003e\n  \u003cli\u003eA classic British preamp at a fraction of its original retail price.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCondition: Good\u003c\/h3\u003e\n\u003cp\u003eThis hi-fi amplifier is in good condition. It has passed our 8-point functional test, with 2 item(s) not applicable to this unit. Please review all photos carefully, as they provide an accurate representation of the cosmetic condition of the product.\u003c\/p\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eQuad 44\u003c\/li\u003e\n  \u003cli\u003eNo additional accessories included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAbout this model\u003c\/h3\u003e\n\u003cp\u003eThe Quad 44 is a preamplifier built around a fully modular input configuration, offering five inputs - Disc, Tape 1, Tape 2, Radio, and Auxiliary - with interchangeable modules that allow configurations including moving coil pickup or microphone inputs. Rather than conventional bass and treble controls, it features an unconventional tone control section with variable slope low-pass filtering and filter\/tone cancel, reflecting the measured, engineering-led approach Quad brought to its 1980s designs. Total harmonic distortion is rated at 0.05%, with a frequency response of 30Hz to 20kHz and a signal-to-noise ratio of 86dB on line inputs. The preamplifier's CMOS switching technology and modular architecture also make it straightforward to service and upgrade - an enduring practical advantage of the design.\u003c\/p\u003e\n\u003cp\u003eA great opportunity to own a Quad 44 at this price point.\u003c\/p\u003e","brand":"Quad","offers":[{"title":"Default Title","offer_id":54720951451985,"sku":null,"price":265.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/6913\/0833\/files\/8f256d76-5a0b-4456-87ed-5badaa54bb3f.jpg?v=1787928017"},{"product_id":"quad-77-11l-hi-fi-speaker-very-good","title":"Quad 77-11L - Hi-Fi Speaker - Very Good","description":"\u003ch3\u003eWhy this one\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eVery good condition - light cosmetic wear, no functional issues\u003c\/li\u003e\n  \u003cli\u003eFully tested - all applicable functions verified working\u003c\/li\u003e\n  \u003cli\u003ePart of Quad's respected 77 Series, built for accurate hi-fi listening.\u003c\/li\u003e\n  \u003cli\u003eA rare opportunity to own a piece of classic British hi-fi engineering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCondition: Very Good\u003c\/h3\u003e\n\u003cp\u003eThis hi-fi speaker is in very good condition. It has passed our 7-point functional test, with 1 item(s) not applicable to this unit. Please review all photos carefully, as they provide an accurate representation of the cosmetic condition of the product.\u003c\/p\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eQuad 77-11L\u003c\/li\u003e\n  \u003cli\u003eNo additional accessories included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAbout this model\u003c\/h3\u003e\n\u003cp\u003eThe Quad 77-11L is part of Quad's 77 Series, a range of loudspeakers developed by the long-established British hi-fi brand Quad, known for their engineering-led approach to audio reproduction. As a standmount or bookshelf-format speaker from this series, the 77-11L was designed to sit within a wider system context, pairing naturally with Quad's own electronics of the era. Without verified specification data available, specific driver configurations and frequency response figures cannot be quoted here, but the 77 Series as a whole was positioned as a serious domestic hi-fi product aimed at listeners who prioritise accuracy and musicality.\u003c\/p\u003e\n\u003cp\u003eA great opportunity to own a Quad 77-11L at this price point.\u003c\/p\u003e","brand":"Quad","offers":[{"title":"Default Title","offer_id":54748685533521,"sku":null,"price":285.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/6913\/0833\/files\/8efc6b67-622d-4133-8b72-38fd6b9e58cf.jpg?v=1788174489"},{"product_id":"quad-405-2-power-amplifier-excellent","title":"Quad 405-2 - Power Amplifier - Excellent","description":"\u003ch3\u003eWhy this one\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eExcellent condition - used, with only minor cosmetic defects\u003c\/li\u003e\n  \u003cli\u003eIconic Current Dumping design delivers 100W per channel with renowned reliability.\u003c\/li\u003e\n  \u003cli\u003eA classic British power amplifier available here at a fraction of its original cost.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCondition: Excellent\u003c\/h3\u003e\n\n\u003cp\u003eThis power amplifier is in excellent condition. Tested to power on; no further functional testing performed. Note: The product is in fantastic condition with virtually no surface marks or scratches. Please note: we were unable to fully test this unit as it requires a specific audio input that we did not have available at the time of testing. The amplifier powers on correctly and all controls respond as expected. Please review all photos carefully, as they provide an accurate representation of the cosmetic condition of the product.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eQuad 405-2\u003c\/li\u003e\n  \u003cli\u003eNo additional accessories included\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAbout this model\u003c\/h3\u003e\n\u003cp\u003eThe Quad 405-2 is a stereo power amplifier built around Quad's patented Current Dumping technology, a distinctive architecture that combines a low-powered Class A amplifier - handling fine sonic detail - with a high-powered Class B circuit that supplies the muscle. The result is 100 watts per channel into 8Ω, with the amplifier able to drive loads from 4Ω to 16Ω. A carefully designed current control circuit limits peak output to 8.5A and short-circuit current to 3.1A, protecting both transistors and connected speakers without the abruptness of conventional limiting. Input sensitivity is 0.5V for full output, and the circuit uses a single op-amp for low-distortion gain and DC correction. Compact board-mounted construction with minimal internal wiring keeps the signal path clean and contributes to the 405-2's well-documented reliability and ease of servicing.\u003c\/p\u003e\n\n\u003cp\u003eA great opportunity to own a Quad 405-2 at this price point.\u003c\/p\u003e","brand":"Quad","offers":[{"title":"Default Title","offer_id":55153802707281,"sku":null,"price":305.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/6913\/0833\/files\/14a3d90e-9270-47f5-8a9d-9862c0792485.jpg?v=1790939052"},{"product_id":"quad-fm4-tuner-hi-fi-tuner-excellent","title":"Quad FM4 Tuner - Hi-Fi Tuner - Excellent","description":"\u003ch3\u003eWhy this one\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eExcellent condition - light signs of use, no obvious issues\u003c\/li\u003e\n  \u003cli\u003eFully tested - all applicable functions verified working\u003c\/li\u003e\n  \u003cli\u003eExceptional sensitivity and 70 dB SNR make this a seriously capable FM tuner.\u003c\/li\u003e\n  \u003cli\u003eA classic British hi-fi component designed to pair perfectly with the Quad 44 preamplifier.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCondition: Excellent\u003c\/h3\u003e\n\n\u003cp\u003eThis Hi-Fi tuner is in excellent condition. Of our 8-point functional test, 2 item(s) passed and 6 were not applicable; no faults found. Note: The product is in fantastic condition with virtually no surface marks or scratches. We were unable to carry out a full signal reception test as this would require an aerial input we did not have available; however, the unit powers on correctly and all buttons respond as expected. Please review all photos carefully, as they provide an accurate representation of the cosmetic condition of the product.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eQuad FM4 Tuner\u003c\/li\u003e\n  \u003cli\u003eNo additional accessories included\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAbout this model\u003c\/h3\u003e\n\u003cp\u003eThe Quad FM4 is a microprocessor-controlled FM stereo tuner covering the 88-108 MHz band, designed to complement the Quad 44 preamplifier. It features a digital frequency display alongside a bar graph indicating signal strength and centre tuning, and stores up to seven station presets in battery-backed memory. Sensitivity is rated at 2.7 µV for 50 dB quieting in mono and 25 µV in stereo, with a stereo signal-to-noise ratio of 70 dB and harmonic distortion of just 0.15%. Selectivity stands at 53 dB, and frequency response is quoted as 20 Hz-15 kHz (+0\/-1 dB). The standard output is via a DIN socket, and the aerial input accepts a 75 Ω unbalanced coaxial connection. Note that aftermarket upgrades exist to replace the DIN output with phono\/RCA sockets and to address potential battery leakage while expanding preset capacity to 14.\u003c\/p\u003e\n\n\u003cp\u003eA great opportunity to own a Quad FM4 Tuner at this price point.\u003c\/p\u003e","brand":"Quad","offers":[{"title":"Default Title","offer_id":55153804935505,"sku":null,"price":95.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/6913\/0833\/files\/0bf9f28d-862f-452a-86cc-ccdec8d11746.jpg?v=1790939096"},{"product_id":"quad-34-preamp-excellent","title":"Quad 34 - Preamp - Excellent","description":"\u003ch3\u003eWhy this one\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eExcellent condition - used, with only minor cosmetic defects\u003c\/li\u003e\n  \u003cli\u003eExceptionally tight ±0.5dB channel tracking across the full volume range.\u003c\/li\u003e\n  \u003cli\u003eA rare opportunity to own a classic British solid-state preamp at second-hand pricing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCondition: Excellent\u003c\/h3\u003e\n\n\u003cp\u003eThis preamp is in excellent condition. Tested to power on; no further functional testing performed. Note: The product is in fantastic condition with hardly any surface marks or scratches. We were unable to fully test this unit as it requires a specific input connection for audio that we did not have available at the time of testing. The unit powers on and all buttons respond as expected. Please review all photos carefully, as they provide an accurate representation of the cosmetic condition of the product.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eQuad 34\u003c\/li\u003e\n  \u003cli\u003eNo additional accessories included\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAbout this model\u003c\/h3\u003e\n\u003cp\u003eThe Quad 34 is a solid-state stereo preamplifier offering a thoughtfully designed input selection spanning Radio, Disc (Phono MM\/MC), CD, Tape, and Aux, all switched via pushbutton-controlled solid-state switches with no relays. Its tone-shaping toolkit is distinctive: a Tilt control uses an 8-pole filter to rotate the frequency response around an 800Hz axis, allowing the overall tonal balance to be shifted warmer or cooler, complemented by Bass Lift\/Step controls and switchable HF filtering at 10kHz and 7kHz. The phono stage accepts plugin modules for MC and MM cartridges with variable loading options. Throughout the signal path, polarity is never inverted, keeping the output non-inverting from input to output. Interchannel balance is held to ±0.5dB across the entire volume range - an exceptionally tight specification. The unit runs on low supply rails and draws around 2.75 Watts, making it an unusually efficient and compact preamp at 321 × 64 × 207mm and 3.2kg.\u003c\/p\u003e\n\n\u003cp\u003eA great opportunity to own a Quad 34 at this price point.\u003c\/p\u003e","brand":"Quad","offers":[{"title":"Default Title","offer_id":55153819484497,"sku":null,"price":279.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/6913\/0833\/files\/59438635-2d39-4464-bbcf-9b151470b1de.jpg?v=1790939175"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0775\/6913\/0833\/collections\/at-brand-stage-buy-quad-hi-fi.jpg?v=1791020871","url":"https:\/\/www.audiotrader.co.uk\/collections\/buy-quad-hi-fi.oembed","provider":"Audio Trader","version":"1.0","type":"link"}