2-tier type of suri glass, caster specification. The poles are also silver and are stylishly colored. In addition to its good sound quality, its stylish design is also popular. It brings out the characteristics of a wide range of devices with neutral and natural sound quality. The pole is 326mm (Oikawa Tetsuji)
Accessories: none
Main specifications: size W595 x D473 x H465 mm pole length 326 mm weight 12.5 kg (actual measurement) 12.5 kg
216mm pole (19mm diameter) set of 4 black color Please use it to add shelves or extend poles for Q4, Q4D, etc. There are abrasions and line scratches in places (Kojima Yosuke)
The price has been reduced. 2025/8/24 sales price 49,800 yen This is an 11L series Signature model. A small bookshelf speaker with a beautiful finish and appropriate British sound. It's a quad like model that plays strings and vocal music brightly. There are conspicuous dents on the exterior and the top plate on one side, and a feeling of use such as dullness and minor scratches can be seen (Kobayashi Hitoshi)
Maintenance information: 2025.8.24 Operation confirmed
Accessories: saran net, jumper
Main specifications: 2-way bass reflex tweeter 25 mm, woofer 125 mm, crossover frequency, 2,200 Hz, playback frequency band 48 to 22,000 Hz, output sound pressure level 87 dB, rated impedance 6 ohms, size W190 x H310 x D263 mm, weight 6.3 kg
Quadra Spire 3-tier rack, cherry color, spikes. In addition to its good sound quality, its stylish design is also popular. It brings out the characteristics of a wide range of devices with neutral and natural sound quality. The height of both poles is 256 mm (Oikawa Tetsuji)
Accessories: spike holder
Main specifications: W600 x H645 x D475 mm pole length 256 mm 6.9 kg (actual measurement)
A two-tiered type of pickled glass with spikes. The poles are also silver and are stylishly colored. In addition to its good sound quality, its stylish design is also popular. It brings out the characteristics of a wide range of devices with neutral and natural sound quality. The pole is 256 mm (Oikawa Tetsuji)
Accessories: spike holder
Main specifications: size W595 x D473 x H356 mm pole length 256 mm weight 11.4 kg (actual measurement)
Additional shelf for Quadraspire popular rack Q4D If you are a Q4D user, how about taking this opportunity (Sasaki Shota)
Accessories: none
Main specifications: 600 x 475 mm
Speaker cable 2.4 m pair end unprocessed Star Quad system that reduces inductance by arranging 2 electric wires diagonally opposite each other in parallel. The exterior is dull and has a feeling of use (Takahashi Nobuyuki)
Maintenance information: 2025.9.7 continuity confirmed
Accessories: none
A Star Quad system that reduces inductance by arranging 2 electric wires that are diagonally opposite each other at the end of only 5.0 m 1 speaker cable without treatment. The exterior is dull and has a feeling of use (Takahashi Nobuyuki)
Maintenance information: 2025.9.7 continuity confirmed
Accessories: none
Speaker cable 2.4 m pair end unprocessed Star Quad system that reduces inductance by arranging 2 electric wires diagonally opposite each other in parallel. The exterior is dull and has a feeling of use (Takahashi Nobuyuki)
Maintenance information: 2025.9.7 continuity confirmed
Accessories: none
This is a quad tall boy type speaker that evokes the essence of good old England. The unique sense of fine particles can be heard as a taste, and the sound field space expression that does not make you feel the presence of a speaker is an attractive performance machine. Appearance, dullness, scratches, and a feeling of use can be seen (Kobayashi Hitoshi)
Maintenance information: 2025.9.4 operation confirmed
Accessories: saran net, jumper (replacement)
Main specifications: 2-way rear bass reflex cherry finish 2.5 cm tweeter 17 cm woofer playback frequency band 35 to 24,000 Hz crossover frequency 2,200 Hz size W205 x H800 x D290 mm 13 kg
The disposal price has been reduced! (Member discounts are not applicable) 2025/8/29 sales price 118,000 yen QUAD is a power amplifier that combines a wide range and high signal-to-noise level with traditional, high-texture tones. Equipped with QUAD LINK, system control is also possible. Extremely practical quality can be obtained from its compact size. There are dirt scratches and threads on the exterior. Serial 99SG0109 (Fujisawa Yukishi)
Maintenance information: 2025.8.29 operation confirmed
Accessories: power cord
Main specifications: input RCA/QUAD-LINK: 1 system each input impedance 33k ohm input sensitivity 775mV (RCA input) output 1 system (banana plug can be used) maximum output: 90W/8ohm, 120W/4Ω S/N ratio 110dB frequency characteristics 3 Hz to 50 kHz W321 × H70 × D310 mm mass 6.25 kg
Maintained! A classic British Quad stereo power amplifier. Small in size yet full torque. The sound, which is as deep as a tube amp, exudes an appeal that won't fade. You can see a feeling of use such as appearance, dullness, small scratches, etc. (Kobayashi Hitoshi)
Maintenance information: 2025.6.7 maintenance completed (dismantling check, constant voltage drive Tr/Rch power stage Tr co-exchange, DC cut C/gain setting C co-exchange, operation check, bias/medium point output adjustment)
Accessories: copy of instruction manual, power cord, connection cord
Main specifications: 45W+45W W120×H159×D324mm 8.2 kg
The disposal price has been reduced! (Member prices are not applicable) 2025/7/5 sales price 118,000 yen Maintained! This is QUAD's first transistor preamp. The dark tone, with a sweet sense of humidity, is the British sound itself. The combination with the company's 303 power amplifier is also an attractive system. In addition to paint peeling on the exterior and VOL dial, dullness and a feeling of use can be seen. Serial 19243 (Yamato Yuki)
Maintenance information: 2025.1.19 maintained (all dismantling checks, internal PHONO/LINE board coupling C, replacement with audio grade C, bypass C, etc., power supply board C replacement, standard VOL cleaning)
Accessories: power cable connection cable
Main specifications: Phono 1 system, 3 line systems, W260 x H92 x D165 mm, 3 kg
The disposal price has been reduced. Member discounts are not applicable. 2025/7/31 sales price 99,800 yen Maintenance completed in 2023/11. The 606A has been made more stylish by cutting the 606 edge. Similar to the 606, the driving feeling that cannot be imagined from its compact exterior is attractive. The sound quality adds a sense of speed to conventional sound quality. It goes perfectly with classical music as well as jazz vocals. There are small scratches and paint peeling on the exterior. Serial Q 021836 (Takasaki Atsushi)
Maintenance information: 2023.11.11 Maintained (power stage Tr checked, capacitor replaced. Partial resistance deterioration replacement, connector cleaning, ground screw tightening, soldering, RCA cleaning, operation check) 2015.4.26 maintained (RCH power stage TR insulation sheet repair. In-board C exchange. The RCA terminal and SP terminal have been replaced. (There is a “Gee” sound due to the influence of an exchange transformer such as a cable, etc., but it won't get any louder)
Accessories: power cord
Main specifications: 140W+140W (8Ω) W321×H140×D238mm 12kg
The price has been drastically reduced. 2025/8/31 sales price 128,000 yen 2023/10 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. You can see a feeling of use, such as appearance, dullness, abrasions, etc. (Kobayashi Hitoshi)
Maintenance information: 2023.10.13 maintenance completed (internal parts dismantling check, power Tr, driver Tr, etc., etc., C, R, etc. can all be checked. Burning was corrected due to partial heat generation on both channel board patterns. The RCA terminal, input volume installation (expansion), Din terminal, SP terminal, and block capacitor have been replaced. (The input/output waveform was checked, left and right balance checked, load tests, and comprehensive operation tests were performed to confirm normal operation.)
Accessories: power cable, instruction manual (copy)
Main specifications: 100W+100W frequency characteristics 20 to 20 kHz dimensions W341 x H115 x D195 mm weight 9 kg
The price has been reduced. 2025/8/30 sales price 118,000 yen Maintained! This is QUAD's first transistor preamp. The dark tone, with a sweet sense of humidity, is the British sound itself. The combination with the company's 303 power amplifier is also an attractive system. The appearance, dullness, and feeling of use can be seen. Serial 52112 (Murakoshi Yoichi)
Maintenance information: 2025.8.28 Maintained (volume contact cleaning) 2025.6.19 Maintained (main VOL dismantling, slider repair cleaning. Balance VOL exchange. Replace C in other power supplies and C in PHONO/LINE. (Power SW spark killer replaced, changed to 100V specification)
Accessories: power cord, input/output cable, instruction manual (copy)
Main specifications: external dimensions W550 x H110 x D220 mm, weight approx. 7.4 kg (actual measurement) [33] 3 input/line systems, 1 phono system (MM) [FM3] tubular FM dedicated tuner with automatic stereo/mono switching
Maintained! Late QUAD44 with CD input terminal. All inputs and outputs are equipped with RCA terminals. An elegant and lustrous tone. It has the natural texture of the acoustic sauce and the smooth tone that feels good against the skin. The output sensitivity can be selected from 3 levels. As for the exterior, there are scratches and dullness over time, and there is noticeable paint peeling on the right side. Serial Q036565 (Yamato Yuki)
Maintenance information: 2025.9.2 maintained (balance VOL cleaning, other SW and VOL checks, C etc. in each internal board replaced ~ operation check.) 2023.11.17 Maintained (filter VOL, SW lever installation failure, reprocessing, etc., internal bypass C, coupling C, etc. have been replaced, operation check OK)
Accessories: instruction manual copy power cable
Main specifications: LINE input 1 system PHONO input 1 system Phono sensitivity 1m/3m/10mV switching W321 × H103 × D203 mm 4.0 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: 2025.3.5 maintenance completed (power supply SW contact cleaning, correction, RCA terminal screw fixing, 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
Maintained including replacement of 1 transistor and 6 capacitors. The 606 is thick and unimaginable from its compact exterior. The good sound unique to QUAD allows you to enjoy not only classical music, but also jazz vocals in a mild way. The high level of musicality that makes you enjoy the music with a pleasant tone stands out. Overall there is dullness (Oikawa Tetsuji)
Maintenance information: 2025.8.24 Maintained (±b bypass C in both CH boards, gain setting C replacement Lch power stage Tn x 1, poor characteristics → replacement
Operation test)
Accessories: power cable
Main specifications: output 140W+140W (8Ω) W321×H140×D238mm 12kg
※The lid of the remote control is missing, so it's cheap. Maintained in 2014. A preamplifier that can be operated by a full remote control. A familiar quad tone that is natural, easy to listen to and won't get tired of. In addition to volume, left and right balance, input switching, etc., it is fully equipped with functions such as TILT (loudness like function) and high pass and low pass filters (2 levels each), which is convenient. The exterior has line scratches on the top plate and other scratches overall (Mizusaki Ryo)
Maintenance information: 2025.8.14 operation confirmed
2014.12.13 Maintained (disconnected due to AC fuse deterioration → replaced. Check internal capacitors, relays and transistors → OK. Since the remote control switch cannot be dismantled, it cannot be cleaned. Operation check OK)
Accessories: remote control, power cable
Main specifications: full remote control control amplifier with PHONO input (mm) W321 x H80 x D255 mm 3.3 kg
The disposal price has been reduced. Member prices are not applicable. 2025/7/4 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 (Daiki Goto)
Maintenance information: 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. 2025/7/12 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. There is dullness and small scratches (Sasaki Shota)
Maintenance information: 2025.7.12 Maintained (drive transistor (BD244 x 4), power transistor (MJ15024G x 1), and original differential op amp (TL071 x 2) parts were replaced. The connection cord and power cord have been attached.
Input/output waveform confirmation, left and right sound pressure level checks, load tests, and comprehensive operation tests were performed to confirm normal operation) 2025.6.9 maintained (there is a pattern short in the board, poor output board mounting, capacitor deterioration, block C lead wire soldering, driver transistor deterioration, operation check)
2024.8.6 Maintained (all internal parts checked, LCH power stage TR x 1 half short NG replacement, DC cut C replacement within the board, replacement of bottom cover rubber foot defects, operation check)
Accessories: copy of 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
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
The disposal price has been reduced. Member discounts are not applicable. 2025/7/4 sales price 128,000 yen Maintained! The QUAD405 is full of appeal and makes you listen to the overall 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. The exterior has dullness and scuffs. Serial 4546 (Murakoshi Yoichi)
Maintenance information: 2025.7.2 maintained (internal all dismantling check, Tr, C, R check, 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 disposal price has been reduced. Member prices are not applicable. 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 disposal price has been reduced. Member prices are not applicable. 2025/6/21 sales price 118,000 yen 17 capacitors have been replaced, volume, switch cleaning, etc. have been maintained. This is QUAD's first transistor preamp. The dark tone, with a sweet sense of humidity, is the British sound itself. The combination with the company's 303 power amplifier is still recommended. There are scars, dullness, etc. appropriate for the model year (Oikawa Tetsuji)
Maintenance information: 2025.6.21 maintained (balance Rch lead with internal disconnection → correction, soldering
Each VOL and SW cleaning. PHONO/LINE in-board coupling C, bypass C, etc. replacement ~ operation check, 3-type cable creation)
Accessories: power cable, connection cable, copy of instruction manual
Main specifications: Phono 1 system, 3 line systems, W260 x H92 x D165 mm, 3 kg