The price has been drastically reduced. 2026/9/5 sales price 420,000 yen 2 block capacitors, 12 film capacitors have been replaced, etc., and maintenance has been completed! Original voltage specification (with 100V to 220V step-up transformer). A separate amplifier that is still popular even now, 70 years after its release. The thickness, luster, and tension of the sound are all emotionally composed, and perfectly express the sound of the instrument. Anyway, it is a famous machine with thick, firm mid-bass, and a tasteful sound unique to vacuum tubes. There are scratches and rust on the exterior (Hiura Katsuji)
Maintenance Information: 2026.9.4 Maintained (2026.8.22 Maintained (QUAD2 (common) · Step Up Transformer Missing Item Added · Block Capacitor 15 μF × 2 Deterioration Replacement and Mounting Bracket Fabrication 1 × 2 · Resistor 3W Deterioration Replacement 1 × 2 ◎ QUAD2 (No. 65273) · Film Capacitor 0.1 μF Deterioration Replacement · 4 Resistors 1W Deterioration Replacement QUAD22 · AC Cord Replaced for Europe · Main volume poor contact repair · RCA jack deterioration replacement · vacuum tube socket deterioration replacement · block capacitor deterioration → 3 electrolytic capacitors 25 μF deterioration replacement · 2 Mylar capacitors 4000 pF deterioration replacement · 8 film capacitors 0.5 μF other deterioration replacement · 5 resistors 1W and 1/2W deterioration replacement · CD input reduction measures → 4 1/4 W resistors added to Radio1 (*volume is (Since it has already been replaced with an A/B product by another company, the gain has also been reduced from normal due to gang error countermeasures during small inputs.) ・Copper plate deterioration replacement/vacuum tube socket caulking
Accessories: 100V-220V step-up transformer power cable
Main specifications: 17W (8Ω) with rated output AC220V [QUAD22] EF86 × 2 ECC83 × 2 input PHONO, RADIO, TAPE W267 × H89 × D148 mm 3.2 kg [QUAD2] KT66 × 4 EF86 × 2 GZ32 15W+15W W321 × H162 × D119 mm 8.2 kg/unit
Power cable, 1.8 m, 6N copper conductor, 4 core structure, is a cable characterized by being able to stably flow large currents. It starts up quickly, and its strong expression is attractive (Murakoshi Yoichi)
Maintenance information: 2026.10.3 continuity confirmed
Accessories: none
The price has been drastically reduced. 2026/9/6 sales price 128,000 yen Maintenance has been completed, such as INPUT DIN connector and power supply block C replacement. Quad power amplifier Despite its compact body, you can enjoy a smooth, thick sound. It really goes well with speakers made in England, and makes you listen to 70s analog sound with a sense of dynamism. A feeling of use can be seen on the exterior, dullness, rust, scratches, etc. (Kobayashi Hitoshi)
Maintenance information: 2026.9.4 maintained (INPUT DIN connector, power supply block C ± co-exchange (original), C and part resistance exchange in both CH boards, Tr check, operation check)
Accessories: copy of instruction manual, power cable, connection cable
Main specifications: 100W+100W frequency characteristics 20 to 20 kHz dimensions W341 x H115 x D195 mm weight 9 kg
Maintained! It has an elegant and glossy tone, and the output sensitivity can be selected from 3 levels. Combinations with 405 are common, but 606 etc. are also a good match. It has the natural texture of the acoustic sauce and the smooth tone that feels good against the skin. (FUJISAWA KOSHI)
Maintenance information: 2026.5.15 Maintained (replacement of coupling tantalum capacitors, bypass capacitors, etc. within each board. Each rotary switch is balanced VOL cleaned. Power Switch and Spark Killer Capacitor Replacement (*Since this is an early model, there are sound leaks even in VOL0)
Accessories: copy of instruction manual, power cord, connection cord
Main specifications: 2 LINE inputs, 1 PHONO input, 1 phono sensitivity, 1m/3m/10mV switching, W321 x H103 x D203 mm, 4 kg
The disposal price has been reduced. Member prices are not applicable. 2026/8/3 sales price 128,000 yen Maintained in 2025/5! Quad power amplifier Despite its compact body, you can enjoy a smooth, thick sound. It really goes well with speakers made in England, and makes you listen to 70s analog sound with a sense of dynamism. Scratches can be seen on the top plate. Serial 39513 (Fujisawa Yukishi)
Maintenance information: 2025.5.16 Maintained (rubber feet x 4 replaced. Speaker terminal and output board C replacement. Pattern correction (terminals are for banana terminals only). Power stage T, driver Tr, IC, and tantalum C replacement. Connector fix. VOL cleaning)
Accessories: copy of instruction manual, power cord
Main specifications: 100W+100W frequency characteristics 20 to 20 kHz dimensions W341 x H115 x D195 mm weight 9 kg
The disposal price has been reduced (member prices are not applicable). 2026/5/24 sales price 128,000 yen Maintained! Quad power amplifier. Although it is a compact body, you can enjoy the sound with a thick core. In particular, it makes me listen to 70s analog sounds with a sense of dynamism. There is dullness, scratches, and paint peeling (Asaine Tomoho)
Maintenance information: 2026.5.24 maintained (pattern all re-soldered in the board) 2025.11.18 maintained (internal check pattern repair piece ch check) 2025.7.4 maintained (internal double channel dismantling TN check → OK. DC cut C, gain setting C, etc. exchange ~ operation check)
Accessories: power cable, connection cable
Main specifications: 100W+100W frequency characteristics 20 to 20 kHz dimensions W341 x H115 x D195 mm weight 9 kg
The disposal price has been reduced! (Member prices are not applicable) 2026/5/22 sales price 128,000 yen Maintained! Quad power amplifier Despite its compact body, you can enjoy a smooth, thick sound. It really goes well with speakers made in England, and makes you listen to 70s analog sound with a sense of dynamism. The exterior is painted bald. Serial 7135 (Fujisawa Yukishi)
Maintenance information: 2026.5.22 Maintained (AC sector router → noise → replacement. Check all capacitors, power transistors, and transistors in both channel boards → replace deteriorated capacitors. Operation check)
Accessories: instruction manual, power cord, connection cord
Main specifications: 100W+100W frequency characteristics 20 to 20 kHz dimensions W341 x H115 x D195 mm weight 9 kg
The disposal price has been reduced! (Member discounts are not applicable) 2025/11/19 sales price 128,000 yen Maintained! RCA and VOL have been added, so it's easy to use. The exterior is painted black. Quad power amplifier Despite its compact body, you can enjoy a smooth, thick sound. It really goes well with speakers made in England, and makes you listen to 70s analog sound with a sense of dynamism. The exterior is dull and has small scratches over time. Serial 8508 (Yonejima Satoshi)
Maintenance information: 2025.11.19 Maintained (internal all inspection → Lch power stage Tr, gain setting C, INPUT VOL replacement. DIN SP rewiring, first drive IC OP AMP replacement)
Accessories: power cord
Main specifications: 100W+100W frequency characteristics 20 to 20 kHz dimensions W341 x H115 x D195 mm weight 9 kg
Maintained! Input/output RCA specification! It has an elegant and glossy tone, and the output sensitivity can be selected from 3 levels. Combinations with 405 are common, but 606 etc. are also a good match. It has the natural texture of the acoustic sauce and the smooth tone that feels good against the skin. *The switch bank on the top plate has been removed and cannot be used (the TAPE input itself can be used.) You only need to put the acrylic cover on the top plate. Serial 024572 (Fujisawa Yukishi)
Maintenance information: 2026.5.3 maintained (replacement of a total of 17 coupling capacitors and other capacitors in the main board. Each VOL and SW cleaning. AC spark killer replacement.)
Accessories: power cord, connection cord
Main specifications: 2 LINE inputs, 1 PHONO input, 1 phono sensitivity, 1m/3m/10mV switching, W321 x H103 x D203 mm, 4 kg
The disposal price has been reduced. Member discounts are not applicable. 2026/1/11 sales price 128,000 yen Maintenance completed in 2013/1. Quad power amplifier. Despite its compact body, you can enjoy a smooth, thick sound. It really goes well with speakers made in England, and makes you listen to 70s analog sound with a sense of dynamism. Exterior, dullness, chipping, bruises, abrasions, etc. can be seen (Kobayashi Hitoshi)
Maintenance information: 2026.1.10 operation confirmed 2013.1.18 maintenance completed (each inspection adjustment, RCA terminal installation, VR replacement input/output, balance waveform measurement operation confirmed)
Accessories: power cable, copy of instruction manual
Main specifications: 100W+100W frequency characteristics 20 to 20 kHz W341 x H115 x D195 mm 9 kg
Maintenance has been completed, such as replacing 12 deteriorated capacitors, replacing 1 resistor, and creating a new connection cable. A small British QUAD preamp. It has an elegant and glossy tone, and the output sensitivity can be selected from 3 levels. Combinations with 405 are common, but 606 etc. are also a good match. It has the natural texture of the acoustic sauce and the smooth tone that feels good against the skin. The adjustment door is newly made of acrylic, but there is no hinge function and it is simply placed on it like a lid (Oikawa Tetsuji)
Maintenance information: 2026.5.10 Maintained (power supply filter C replacement. AC Spark Killer C and card board bypass C replacement (VOL cleaning for each SW cleaning, connection cable creation)
Accessories: power cable, connection cable
Main specifications: 2 LINE inputs, 1 PHONO input, 1 phono sensitivity, 1m/3m/10mV switching, W321 x H103 x D203 mm, 4 kg
Maintained! A famous machine 44 with an easy-to-handle RCA terminal added to the rear terminal of the Quad control amplifier. The British QUAD's small preamp is a perfect balance between the freshness and richness of character. When paired with the same speakers made in England, you can enjoy a calm, high-quality sound. There are line scratches on the left side of the exterior, dull buttons, etc., and there is a feeling of use throughout (Kobayashi Hitoshi)
Maintenance Information: 2026.2.3 Maintained (IC OP AMP replacement in CD position board. Other checks) 2025.3.5 maintenance completed (power supply SW contact cleaning, correction, RCA terminal screw tightening correction, cleaning, caulking each SW, Vol cleaning (some chips remain) 2023.11.15 maintenance (VOL cleaning, C replacement in other mainboards, C etc. in each AMP, etc.) AC spark killer replacement in the power supply.)
Accessories: power cord, connection cord, instruction manual (copy)
Main specifications: 2 LINE inputs, 1 PHONO input, 1 phono sensitivity, 1m/3m/10mV switching, W321 x H103 x D203 mm, 4 kg
The disposal price has been reduced. Member prices are not applicable. 2025/11/23 sales price 32,000 yen additional shelf board for QAVM. A valuable suriglass type that is now difficult to obtain. There are no noticeable scars (Kojima Yosuke)
Accessories: none
Main specifications: W1085×H25×D500mm
The disposal price has been reduced! (Member prices are not applicable) 2025/11/18 sales price 128,000 yen Maintained! The QUAD405 is full of appeal and makes you listen to the whole picture of the music in a tasteful way. Along with feedforward operation, the high quality, which smoothly transitions to A class operation at low levels and B class operation when the level rises, is also worth listening to. There are scratches, scuffs, and dullness on the exterior. Serial 4546 (Jun Tamai)
Maintenance information: 2025.10.12 Maintained (INPUT connector VOL lead resoldering process check)
2025.7.2 Maintained (internal all dismantling checks, Tr, C, R checks, operation checks, rubber, etc.)
2016.12.23 Maintained (Vol replacement, Rch power, Tr replacement, capacitor resistor replacement (both channels) operation check)
Accessories: Connection cord, power cord, copy of instruction manual
Main specifications: 100W+100W (8Ω) dimensions W341 x H115 x D195 mm weight 9 kg
The price has been reduced. 2025/6/7 sales price 24,000 yen, unopened, set of 4 It is said to be for quadra spike racks. These are high sound quality legs that can be used in place of genuine legs from compatible racks. Ideal sound quality can be brought out when combined with EcoBrass Spike-Base (ASB-0104/ASB-0103) (permanent future)
Maintenance information: 2025.6.7 operation confirmed
Accessories: none
Main specifications: Compatible models QUADRASPIRE racks (compatible with Q4/Q4D series and QAVM glass shelf models)
screw hole diameter 12mm
The disposal price has been reduced. Member discounts are not applicable. 2025/7/5 sales price 128,000 yen Maintenance has been completed, such as replacement of deteriorated capacitors and transistors. Quad power amplifier. Despite its compact body, you can enjoy a smooth, thick sound. It really goes well with speakers made in England, and makes you listen to 70s analog sound with a sense of dynamism. Exterior, paint deterioration, dullness, rust, scuffs, etc. can be seen (Kobayashi Hitoshi)
Maintenance information: 2025.7.5 maintenance completed (block C, VOL, rubber feet, power stage Tr, C and R replacement in the board. Input cable creation (DIN4P-RCA female) operation check)
Accessories: instruction manual, power cable, connection cable
Main specifications: 100W+100W frequency characteristics 20 to 20 kHz dimensions W341 x H115 x D195 mm weight 9 kg
※Shipping service. 40th Anniversary of the First Issue = Special Issue 159 = Jewel Compact Speaker: Hear That Taste/Quad ESL2805/Luxman C1000F/Claire EVO Series Detailed Report/Enjoy Vintage/Released on 2006.7.15. Since the photograph is a sample, the actual product may be broken or there may be markings etc.
Pair tube 12E1 equivalent tube British beam quadrupole top plate measurement value 56/54 (rejected value 40) There is writing on the top of the tube head with original box*Pairs are determined based on GM values measured with the test machine TV-7 (Kojima Yosuke)
Accessories: original box
Pair tube 12E1 equivalent tube British beam quadrupole top plate measurement value 62/56 (rejected value 40) There is writing on the top of the tube head with original box*Pairs are determined based on GM values measured with the test machine TV-7 (Kojima Yosuke)
Accessories: original box
Pair tube (checked with a tube checker) beam quadrupole. There is a tea box. Measured value 36,34/30 (rejection value) *The pair was determined based on the GM value measured by the testing machine TV-7. The ※ logo is scratched, so it's a bargain.