The price has been reduced. 2025/5/28 sales price 448,000 yen Vacuum tubes, electrolytic capacitors, and oil capacitors were replaced and fully maintained! 220V step-up transformer included! 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's thick, chewy mid-bass, and the tasteful sound unique to vacuum tubes is impressive (Murakoshi Yoichi)
Maintenance information: 2025.5.27 maintenance completed ◎ QUAD2 (common) · vacuum tube EF86 defective and deterioration replacement 1 x 2 (2025.4.26 · 0.1 μF deterioration replacement 2 x 2 · electrolytic capacitor 25 μF deterioration replacement 1 x 2 · resistor 3W deterioration replacement 1 x 2 · chassis back screw missing added 1 x 2 ※ SP OUT: 15 Ω wiring
◎ QUAD 22 · Balance Volume Defect Replacement · Spark Killer Defect Replacement 2 pieces · AC Code Assy added with our product · Block Capacitor Deterioration → 22 μF Additional Electrolytic Capacitors 3 · Electrolytic Capacitors 25 μF Degradation Exchange 4 · Film Capacitors 0.01 μF Other Deterioration Replacement 12 · Resistance 1W and 1/2W Deterioration Replacement · 8 Resistors Only · Gang Error Reduction Measures → 1/2 W Resistance Added 4 Vacuum Tube Sockets and RCA jack caulk repair
*Operation has also been checked with AC 220V (rated output measured at 15W SP: 16Ω)
Accessories: power cable, 100V-220V step up transformer (Swallow Electric AG-1000D)
Main specifications: 13W (16Ω) 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
The price has been reduced. 2025/5/30 sales price 118,000 yen Maintained! This is QUAD's first transistor preamp. The luscious, shaded tone is British sound itself. If it's royal, I recommend combining it with the company's 303 power amplifier. There is a feeling of use over time (Daiki Goto)
Maintenance information: 2025.5.28 Maintained (power supply and C all NG in PHONO/LINE board → replacement. Replace TONE/filter VOL because fixed VOL cannot be fixed. Other SW cleaning.)
Accessories: copy of manual, power cable, connection cable
Main specifications: Phono 1 system, 3 line systems, W260 x H92 x D165 mm, 3 kg
The price has been reduced! 2025/5/22 sales price 448,000 yen Electrolytic capacitors and oil capacitors were replaced and fully maintained! 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. The thick, chewy mid-bass sound is impressive, and the tasteful sound unique to vacuum tubes is impressive. There is a slight gap only on the right channel around the 6-7 scale for a while after the power is turned on. There is a white stain on the emblem part, and there is a feeling of use such as small scratches and dirt throughout (Murakoshi Yoichi)
Maintenance information: 2025.5.21 Maintained (QUAD2 (common), oil capacitor 0.01 μF and 3 other pairs replaced, 25 μF 2 pairs of electrolytic capacitors replaced and added. “3W1 pair of resistors” replacement. ※SP OUT: 15 ohm wiring No. 77531 vacuum tube EF86 replacement. QUAD22 · balance volume exchange, replacement of 2 spark killers, addition of missing internal negative screws · restoration to the original in several places, such as the MIC circuit, etc., replacement of 5 film capacitors 5000 pF and 10 others, replacement of 4 25μF capacitors, replacement of 12 resistors 1W and 1/2W, gang error reduction measures for Radio1 only → addition of 4 resistors 1/2W, vacuum tube socket caulking repair. *Operation has also been checked with AC 220V (rated output measured at 13W SP: 16Ω)
Accessories: step-up transformer, instruction manual (copy), power cord
Main specifications: 13W (16Ω) 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
The disposal price has been reduced. Member discounts are not applicable. 2025/5/25 sales price 118,000 yen A total of 21 capacitors, such as power supply capacitors, PHONO/LINE coupling capacitors, etc. have been replaced and maintained. This is the first quad transistor preamp. The compact size and strong sound that resonates well is an attractive item that allows you to fully enjoy classical music. The volume is also not graded and can be adjusted in detail. You can enjoy better European sound when used in conjunction with the company's 303 and 405 power amplifiers. You can see a feeling of use such as appearance, dullness, scratches, etc. (Kobayashi Hitoshi)
Maintenance information: 2025.5.23 maintenance completed (C in power supply, coupling C in PHONO/LINE total 21 replaced, ACSW spark killer replaced. Each SW, VOL cleaning) 2015.1.25 maintained (deteriorated capacitor replacement, selector switch contact cleaning. (Input/output DIN terminal pin replacement)
Accessories: copy of instruction manual, connection cable, power cable
Main specifications: Phono 1 system, 3 line systems, W260 x H92 x D165 mm, 3 kg
Maintained! A classic British Quad stereo power amplifier. There is a sense of power beyond its size. The sound, which is as deep as a tube amp, exudes an appeal that won't fade. There are spots and small scratches on the exterior (Wang Zhan)
Maintenance information: 2025.5.28 Maintained (internal dismantling check, replacement of both power stage Tr channels. In-board gain setting C, DC cut capacitor replacement. Midpoint alignment, adjustment, operation test)
Accessories: power cable, copy of manual, connection cable
Main specifications: 45W+45W W120×H159×D324mm 8.2 kg
The disposal price has been reduced. Member discounts are not applicable. 2025/5/16 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 has a feeling of use such as dullness. Serial 39513 (Takahashi Nobuyuki)
Maintenance information: 2025.5.16 maintained (rubber feet x 4 replacement speaker terminal internal damage/mounting fault/output board C defect, pattern failure → replacement pattern correction (terminal is for banana terminals only) power bullet TR/driver TR/IC/tantalum C deterioration replacement connector poor crimping/sound interruption → correction/vol cleaning)
Accessories: Power cable, copy of instruction manual
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. 2025/5/16 sales price 128,000 yen Maintained! It has an elegant and glossy tone, and although combinations with 405 are common, 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 exterior is in good condition, with minor scratches and dullness, and paint peeling on the right side. Serial 24151 (Yamato Yuki)
Maintenance information: 2024.4.12 maintenance (main board ground point screw reprocessing, operation check) 2024.1.17 maintenance (replacement of coupling C, bypass C, etc. in each board, AC SW spark killer C replacement, INPUT switching analog SW through hole pattern re-soldering, power SW internal contact polishing ~ operation check)
2020.6.13 Maintained (balance VR, SW disassembly cleaning. Attach 1 kΩ resistors to both the left and right sides of the flat board. Replaced due to faulty IC. All flat and mother boards have been soldered again. (Check the input/output waveform, check the left and right balance, and perform a comprehensive operation test by connecting the power amplifier to confirm normal operation.)
Accessories: copy of the power cord instruction manual
Main specifications: 2 LINE inputs, 1 PHONO input, 1 phono sensitivity, 1m/3m/10mV switching, W321 x H103 x D203 mm, 4.0 kg
The price has been drastically reduced! 2025/5/11 sales price 128,000 yen 2024/7 maintenance completed! 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 has a feeling of use such as dullness. Serial 46658 (Tomoho Asaine)
Maintenance information: 2024.7.30 Maintained (all internal inspection checks. Tn check OK, replace some resistors in the board. Gain setting C and DC cut C replaced. INPUT VOL CLEANING Operation check)
Accessories: connection cable, power cable
Main specifications: 100W+100W frequency characteristics 20 to 20 kHz dimensions W341 x H115 x D195 mm weight 9 kg
The price has been drastically reduced! 2025/3/22 sales price 118,000 yen Maintained! QUAD is a power amplifier that combines a wide range and a high sense of SN to the traditional high texture of the sound. Equipped with QUAD LINK, system control is also possible. Extremely practical quality can be obtained from its compact size. There are scratches and marks on the exterior. Serial 99SG0104 (Yamato Yuki)
Maintenance information: 2025.1.17 Maintained (internal parts Tr and CR checks OK. Pin jack position cleaning due to large INPUT rotary torque. Operation check OK)
Accessories: power cable
Main specifications: input RCA/QUAD-LINK: 1 system each input impedance: 33k ohms, input sensitivity: 775mV (RCA input), 1 output system (banana plug can be used), maximum output: 90W/8 ohm, 120W/4 ohms S/N ratio 110dB (20Hz-20kHz) frequency characteristics 3Hz-50kHz external dimensions H70 x W321 x D310 mm mass 6.25 kg
Disposal price has been reduced (member price not applicable) 2025/3/22 sales price 118,000 yen remote control is out of stock. QUAD 99 preamp. Genuine Rocky The QUAD-like design keeps the speaker playing with plenty of atmosphere. It also has sharpness and transparency in the mid to high range, creating a solid effect. The size is also compact and easy to use. The exterior is dull and has threads. Serial 99PG0198 (Tomonori Asaine)
Maintenance information: 2025.3.22 operation confirmed
Accessories: power cord connection cord
Main specifications: input LINE 3 system PHONE 1 system TAPE1 system with PHONO (MM/MC) W321 x H70 x D310 mm weight 4.42 kg
Maintained in 2024/6. This is a compact, space-saving quad preamp 34. It has a supple and delicate expressive power that is not inferior to the 44, which is a higher-level model. The supple, uncharacteristic character goes well with vacuum tube power amplifiers. There is a feeling of use such as scuffs scattered on the top plate. Serial Q041639 (Takasaki Atsushi)
Maintenance information: 2024.6.29 maintenance completed (AC line spark killer NG → replacement, mainboard coupling C, bypass C, etc., operation check)
Accessories: copy of manual, power cord
Main specifications: PHONO (MM compatible) module switchable type W321 x H64 x D207 mm 3.2 kg
The disposal price has been reduced! (Member prices are not applicable) 2025/5/1 sales price 128,000 yen Input volume, RCA terminal processing, installation, etc. have been maintained! Although the Quad power amplifier has a compact body, the core is thick, and you can enjoy smooth sound. It really goes well with speakers made in England, and lets you listen to 70s analog sound with a sense of dynamism. There are exterior, feel of use depending on age, paint peeling, sticking marks, scuffs, and small scratches. Serial 2 2022 (Yamato Yuki)
Maintenance Information: 2025.1.24 Maintained (Driver Tr, IC, C replacement. Output board pattern, short correction) 2024.8.9 maintained (SP terminal replacement (original), other internal all checks, characteristic failure due to Rch power stage Tr temperature change → replacement, in-board gain setting C NG, SP limiter circuit C NG → replacement ~ operation check)
2015.8.25 Maintained (RCA terminals installed. IC, capacitor, resistor, input VR, fuse replacement)
Accessories: Power cable, copy of instruction manual
Main specifications: 100W+100W frequency characteristics 20 to 20 kHz dimensions W341 x H115 x D195 mm weight 9 kg
The price has been drastically reduced! 2025/5/3 sales price 128,000 yen Maintained! Late QUAD44 with CD input terminal. It's not flashy, but the thick, glossy tone is attractive. In particular, it softens female vocals. There is a feeling of use on the exterior, such as dullness and small scratches. Serial Q031658 (Fujisawa Yukishi)
Maintenance information: 2025.5.3 maintained (power supply SW contact cleaning/correction, IC all replacement, symptoms occurred even after check, push buttons, input selector board replaced)
2023.10.22 Maintained (Acre sectorable terminal caulking defect? → soldering. Balance Vol, Filter Vol, SW Cleaning AC spark killer NG, internal in-board bypass C, coupling C replacement)
Accessories: copy of instruction manual, power cord
Main specifications: 2 LINE inputs, 1 PHONO input, 1 phono sensitivity, 1m/3m/10mV switching, W321×H103×D203 mm
※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.