The price has been reduced! 2025/2/15 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 paint bald spots and rust spots (Tamura Eiji)
Maintenance information: 2025.2.15 Maintained (pin jack hot side caulking treatment. Internal check, change to original circuit in both channel boards. Rch power stage Tr, Lch driver Tr, output phase correction R exchange)
Accessories: power cable
Main specifications: 100W+100W (8Ω) current damping method W341 × H115 × D195 mm 9 kg
The price has been drastically reduced. 2025/2/15 sales price 1,880,000 yen*Power cables are being ordered. Flagship mono power amplifier “Grandioso M1”. High-grade parts have been introduced everywhere to achieve delicate and transparent sound quality while being a high-power amplifier. It reproduces sound quality with high transparency, which is unthinkable with conventional high-power machines, at a low volume. The appearance is fine, with no noticeable scratches, etc. (Kobayashi Hitoshi)
Maintenance information: 2025.2.12 Operation confirmed
Accessories: instruction manual, power cord
Main specifications: Rated output: 300W (8Ω) 600W (4Ω) frequency characteristics 5Hz to 100kHz W491 x H221.5 x D535 mm approx. 62 kg
The disposal price has been reduced! (Member prices are not applicable) 2025/2/12 sales price 278,000 yen Maintained! It is a popular power amplifier for its unique design and high driving capability for low impedance loads. The sound is clear and highly transparent, and the high texture in the mid-high range is also attractive. It seems to entertain vocals, strings, etc. in an elegant manner. The exterior has age dullness and small scratches (Satoshi Yonejima)
Maintenance information: 2025.2.12 Maintained (output relay and surge killer relay replaced. Power switch sliding part polishing and cleaning. Speaker terminal cleaning. Panel peeling correction. Heat resistant tape replacement. Connector cleaning. Solder correction. Removes rust. It can operate at 100V AC. Bias and offset checks. Output audio check)
Accessories: power cord
Main specifications: 250W+250W (8Ω) 380W+380W (4Ω) 625W+625W (2Ω) W483 x H250 x D450 mm weight 33 kg
The price has been reduced. 2025/2/2 sales price 398,000 yen Maintenance completed! Mark Levinson mid-range power amplifier. It is popular because it makes a lot of noise. Circuits for the left and right channels, including the power supply unit from the input terminal to the output terminal, are separated and configured independently. The driving power and subtlety that makes a large speaker play lightly, and the thick sound that feels good to listen to even in Madrigal Levinson are attractive. The exterior is dull and has a feeling of use (Oikawa Tetsuji)
Maintenance information: 2025.1.19 Maintained (replacement of 4 transistors, 45 capacitors and other deteriorated parts, DC voltage, DC offset voltage, idling current, and other adjustments)
Accessories: instruction manual, power cable, short pin
Main specifications: 200W+200W (8Ω) 400W+400W (4Ω) 800W+800W (2Ω) bi-wire compatible input/RCA x 1 · XLR x 1 W446 x H262 x D479 mm 58 kg
The price has been drastically reduced. 2024/12/21 sales price 298,000 yen Maintained. The meter lamp etc. have been converted to LEDs, and it has a vivid appearance. A masterpiece transistor type power amplifier from McKinn's heyday. The powerful, rich, and thick tone is a popular gem among jazz fans of yesteryear. The sound combined with speakers such as the 4343 is exceptional. There is some peeling and disappearing characters on the exterior. Serial CH1612 (Tamura Eiji)
Maintenance information: 2024.11.29 Maintained (lamp converted to LED. Power SW meter SW reinforcement correction. Mute relay contact cleaning, connector pattern solder crack re-soldering, RCA replacement (gold plating) 100V specification change. Lamp, transistor replacement, and each connector cleaning. (Each SW, VOL cleaning, noise suppression processing)
Accessories: repair statements, replacement parts
Main specifications: 200W+200W (1/2/4/8 ohms), equipped with an attenuator on the front, input sensitivity 0.75/2.5V, W411 x H181 x D368 mm, 38.6 kg
Refreshment maintenance completed with attention to detail, such as replacing 51 capacitors! The diamond called Yamaha FET shows off its excellent purity and transparency. With this brush-up, the sharpness of the stand up and the high level of transparency have been completely revived, and you can enjoy natural Yamaha sound without getting tired of listening. You can see a feeling of use, such as appearance, dullness, abrasions, etc. (Kobayashi Hitoshi)
Maintenance information: 2025.2.7 Maintained (replaced 8 transistors and capacitors in the left and right main amplifier circuits, deteriorated transistors in the power supply circuit, and 4 input volumes. Switch type disassembly contact polishing. DC balance idling adjustment in the amplifier circuit. (Meter circuit level adjustment)
Accessories: instruction manual (copy)
Main specifications: output 100W+100W (8Ω) SNR 115dB W436 x H151 x D370 mm 26 kg
Mark Levinson's most popular masterpiece amplifier. From the conventional tight and slightly slender No. 23, it has been transformed into an amplifier with an excellent sense of volume that combines thickness in the mid to low range and a sense of power. Hats off to the ability to easily drive a 38cm woofer. There is a noticeable scratch on the upper front. Serial 5493 (Jun Tamai)
Maintenance information: 2025.2.3 operation confirmed
Accessories: Power cable, short pins, 2 Remo pins, copy of the instruction manual
Main specifications: Dual monaural configuration, stereo amplifier, rated output 200W+200W (8Ω), frequency characteristics, 4 to 140000 Hz, SNR, 104 dB, input impedance 50 kΩ, W483 x H210 x D450 mm, 40 kg
The price has been reduced. 2025/2/3 sales price 59,800 yen Maintenance completed in 2024/8. The natural and clear sound quality is a power amplifier typical of ONKYO. It also has plenty of power, so it dynamically demonstrates driving power, and since it has a firm outline, it is very easy to listen to and is a bargain for all genres. You can see the appearance, dullness, scratches, dirt, etc. and a feeling of use (Kobayashi Hitoshi)
Maintenance information: 2024.8.19 maintained (Lch circuit fuse, transistor, capacitor replacement Rch circuit transistor, capacitor replacement, capacitor, diode replacement, output relay replacement, power lamp replacement, solder repair, DC, bias adjustment, long running test)
Accessories: none
Main specifications: 160W+160W (4Ω) 105W+105W (8Ω) dimensions W450 x H165 x D322mm weight 17 kg
The price has been drastically reduced. 2025/1/11 sales price 99,800 yen Maintenance completed! Marantz 2nd generation solid state power amplifier. It has a complete dual mono configuration, and the left and right channels of the power cord on the back are independent, eliminating mutual interference between each channel, and excellent in terms of separation. You can enjoy the atmosphere unique to this age. On the exterior, the screw holes in the cabinet are loose and cannot be fixed, and in addition to dents on the top plate, you can see a feeling of use such as dullness, fading, marks, scuffs, etc. (Kobayashi Hitoshi)
Maintenance information: 2025.1.10 maintenance completed (lamp replacement, replacement of 12 internal capacitors, relay dismantling cleaning, offset bias adjustment, VOL dismantling cleaning, operation check)
Accessories: none
Main specifications: continuous output 100 W+100 W (8 ohms) frequency characteristics 10 Hz to 60 kHz ± 1 dB damping factor 150 or more (8 ohms) W391 x H146 x D203 mm 14.5 kg
The disposal price has been reduced. Member discounts are not applicable. 2025/1/28 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 (Hiura Katsuji)
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, instruction manual (copy)
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 price 25,000 yen 2024/2/3 sales price 30,000 yen ※There are no operation confirmation issues, but since it is for business use, it will be handed over as is without warranty. It is an attractive amplifier with a maximum output of 100W during 4-channel operation, and the strength unique to commercial use. There is a feeling of wear such as scratches and dullness on the exterior as a whole (Ryo Mizusaki)
Maintenance information: 2024.2.3 sound output confirmed
Accessories: none
Main specifications: 80 W x 4 (8 Ω continuous output) 100 W x 4 (4 Ω continuous output) 200 W (BTL 8 Ω continuous output) W480 x H88 x D417 mm weight 12.5 kg
Maintained! It is ONKYO's classic best-selling amplifier that has taken the world by storm with its transparency and spacious sound quality. The ease of use without choosing a preamp is attractive. It is as powerful as it looks, but the sound quality is not persistent and less tiring to listen to. The exterior has dullness and rust in places (Mizusaki Ryo)
Maintenance information: 2025.1.22 Maintained (volume dismantled and cleaned. Disassemble the speaker switch and meter range switch and apply polishing grease. Output relay replacement. Meter lamp replacement. Indicator lamp replacement. Solder repair for power amplifiers and meter boards. (Interior and exterior inspection and cleaning, running tests)
Accessories: copy of instruction manual
Main specifications: 170W+170W (4Ω) 130W+130W (8Ω) frequency characteristics 1Hz to 100kHz impedance 4Ω to 16Ω W480 × H174 × D422mm 20.5 kg
The disposal price has been reduced! (Member prices are not applicable) 2025/1/18 sales price 128,000 yen 2024/8 maintenance completed! Quad power amplifier Despite its compact body, you can enjoy a smooth, thick sound. As expected, it is compatible with speakers made in England, and it makes you listen to 70s analog sounds with a sense of dynamism. There are peeling scratches in places and a feeling of use. Serial 6105 (Asaine Tomoho)
Maintenance information: 2024.8.6 maintained (2 Rch power Tr installed, fuse installed. C, R check. Replace the rubber feet. Operation check)
Accessories: Power cable, connection cable, copy of the instruction manual
Main specifications: 100W+100W frequency characteristics 20 to 20 kHz dimensions W341 x H115 x D195 mm weight 9 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. There is dullness, rust, and scratches (Sasaki Shota)
Maintenance information: 2025.1.17 maintained (internal all check, power stage Tr x 2, power supply Tr x 1, DC cut C, gain setting C, etc. NG → replacement. Operation check, bias setting, mid-point voltage setting readjustment)
Accessories: power cable, connection cable
Main specifications: 45W+45W W120×H159×D324mm 8.2 kg
We've reduced the price! 2024/12/19 sales price 69,800 yen Maintenance was completed in 2023/2. A power amplifier with a unique pyramid design. Although it is compact, it has a 200W+200W output, and it makes you hear powerful sound. It drives the speaker with a natural sound typical of Yamaha. There are scratches and scratches on the exterior. Serial 02253 (Tamura Eiji)
Maintenance information: 2023.2.4 Maintained (replacement of deteriorated capacitors and resistors in the power supply circuit. Replacement of deteriorated ICs in the amplifier circuit. (Corrected all soldering on pre-drive boards, main boards, etc.)
Accessories: none
Main specifications: 200W+200W (8Ω) W290 x H176.5 x D290 mm weight 9 kg
The disposal price has been reduced (member prices are not applicable). 2024/12/19 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 stains, paint peeling, scuffs, etc. (Wang Zhan)
Maintenance information: 2024.7.26 maintenance (internal dismantling all checks, Tr, C, R checks. INPUT VOL cleaning, operation check)
Accessories: power cable, connection cable
Main specifications: 100W+100W frequency characteristics 20 to 20 kHz W341 x H115 x D195 mm 9 kg
The disposal price has been reduced! (Member price not applicable) 2024/8/3 sales price 118,000 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 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