※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 use 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
※There are no operation confirmation issues, but since it is for business use, it will be handed over as is without warranty. Excellent heat dissipation performance due to the servo cooling system. It clearly brings out stable sound quality even when used continuously for a long period of time, and the sound source and pre are simply brought out. Overall, there is a feeling of use such as dirt and friction (Ryo Mizusaki)
Maintenance information: 2024.2.3 sound output confirmed
Accessories: none
Main specifications: 80 W+80 W (8 Ω continuous output) 110 W+110 W (4 Ω continuous output) 220 W (BTL 8 Ω continuous output) frequency characteristics 20 Hz to 20 kHz +0 -0.5 dB (at 4 Ω 1 W output) dimensions 480 x 102 x 394 mm
The price has been drastically reduced! 2024/4/28 sales price 178,000 yen A power amplifier with a sense of speed and sharpness unique to Threshold. The sense of volume in the mid to low range is also sufficient, and it makes you enjoy music with dense sound throughout the entire range. There are small scratches and dullness on the exterior. H8010186 (Fujisawa Yukishi)
Maintenance information: Maintained on 2013.10.6 (electrolytic capacitor volume replacement, circuit protector replacement. Replace the rubber foot and replace the input RCA jack. Bias and offset checks, maximum output checks, interior and exterior cleaning)
Accessories: power cord
Main specifications: 100W+100W (8Ω) W480 × H192 × D342 mm 24 kg
※It has a cigarette smell, so it's cheap. Currently sold. 115V specification A power amplifier that is supported by a heavyweight power transformer and reproduces tight low frequency reproduction with good visibility. It shows high cost performance that exceeds size and price. There are scratches on the exterior. Serial 217380XCK00185 (Tamura Eiji)
Maintenance information: 2024.4.16 Operation confirmed
Accessories: none
Main specifications: 45W+45W (8Ω) 75W+75W (4Ω) W483 × H51 × D295mm 7.5 kg
※It has a cigarette smell, so it's cheap. Currently sold. 115V specification A power amplifier that is supported by a heavyweight power transformer and reproduces tight low frequency reproduction with good visibility. It shows high cost performance that exceeds size and price. There are scratches on the exterior. Serial 2172380XCK00186 (Tamura Eiji)
Maintenance information: 2024.4.16 Operation confirmed
Accessories: none
Main specifications: 45W+45W (8Ω) 75W+75W (4Ω) W483 × H51 × D295mm 7.5 kg
※It has a cigarette smell, so it's cheap. Currently sold. 115V specification A German stereo power amplifier with resolution and expressiveness not typical of commercial use. It is proud of its exhilarating sound and outstanding driving power that comes out quickly. The exterior has scratches and paint bald spots. Serial 2172380UGD01107 (Tamura Eiji)
Maintenance information: 2024.4.16 Operation confirmed
Accessories: none
Main specifications: 85W+85W (8Ω) 150W+150W (4Ω) W483 x H88 x D270 mm 11.5 kg
*Currently sold. It's an inexpensive yet powerful amplifier. The model, which combines stable operation and abundant power, has a good sense of dynamism in the sound, and it feels like it comes to the fore. The input is equipped with an unbalanced RCA pin and a balanced TRS phone. You can see a feeling of use on the exterior, marks, dullness, abrasions, etc. (Kobayashi Hitoshi)
Maintenance information: 2024.4.26 Operation confirmed
Accessories: power cable
Main specifications: 45W+45W (8Ω) bridge output 150W (8Ω) W480 × H99 × D260 mm 6.8 kg
*Currently sold. There is a gap in the right VOL, which is the current situation. It's an inexpensive yet powerful amplifier. The model, which combines stable operation and abundant power, has a good sense of dynamism in the sound, and it feels like it comes to the fore. The input is equipped with an unbalanced RCA pin and a balanced TRS phone. A feeling of use can be seen on the exterior, marks, dullness, small scratches, abrasions, etc. (Kobayashi Hitoshi)
Maintenance information: 2024.4.26 Operation confirmed
Accessories: power cable
Main specifications: 45W+45W (8Ω) bridge output 150W (8Ω) W480 × H99 × D260 mm 6.8 kg
The disposal price has been reduced! (Member discounts are not applicable) 2024/3/12 sales price 69,800 yen Maintained! A slightly unusual Crown consumer power amplifier. It is thin and rack-mountable. A lot of straight sounds are alive and well. It is also suitable as a separate introductory machine. The exterior is dark and has small scratches (Oikawa Tetsuji)
Maintenance information: 2024.3.12 Maintained (volume volume noise was confirmed, so custom-made volume left and right were replaced, (click sound will disappear due to replacement of custom-made product) Running test with other sounds)
Accessories: none
Main specifications: 50W+50W (8Ω) W480 x H40 x D320 mm 7.5 kg
※Because it smells like tobacco, it's cheap. Maintained! Custom edition of the large power amplifier PA-70 from the STASIS circuit. Supported by a huge 700W toroidal transformer, the speaker driving power, which consists of a 90A power supply, is one of the best among domestic amplifiers. Fortissimo, which excels at delicate depictions but doesn't make you feel limited, is unique to this large amplifier. The exterior is dull and scratched. Serial 11179 (Fujisawa Yukishi) A
Maintenance information: Maintained on 2024.4.26 (bias part and constant current part semi-fixed VR, output relay, and damaged screws were replaced, additional installation due to lack of cable protector, solder crack correction, bias and offset adjustments, output sound check, dirt removal and cleaning)
Accessories: No accessories
Main specifications: rated output 225W+225W (8Ω) W435 x H200 x D421 mm approx. 28.5 kg
Maintained by Accuphase Service! A core power amplifier representing the Accuphase in the mid-80s. Neat sound design, just like Accuphase. A highly complete car that harmonizes high resolution and thickness in an exquisite balance. It is a famous model that was used as a reference power amplifier for various FM magazines at the time. There are scratches on the side corner and front (Sasaki Shota)
Maintenance information: 2024.4.27 Maintained by the manufacturer (due to poor output relay contacts, both A/B were replaced with sealed types. Front, push button switch contact cleaning. Level volume left and right disassembly contact cleaning. (The meter and logo lamp were replaced, the carbon resistance in the power amplifier Ass'y was exchanged left and right, and internal inspection and cleaning characteristics were checked)
Accessories: manual
Main specifications: output 250 W+250 W (8 ohms) frequency characteristics 20 Hz to 20,000 Hz gain 28.0 dB load impedance 2 to 16 ohms damping factor 500 W 481 x H218 x D445 mm weight 33.5 kg
A stereo power amplifier with a traditional dual mono configuration. The overwhelming driving power and precise sound are attractive. The JBL4343 series is a classic combination, and the TANNOY Westminster makes you listen with plenty of volume by ringing the box. There are scratches and corner marks on the exterior. Serial 2596 (Fujisawa Yukishi)
Maintenance information: 2024.4.26 operation confirmed
Accessories: power cord, remo pin, balance short pin
Main specifications: stereo power amplifier, dual mono configuration, 200W+200W (8Ω), 800W (8Ω, when connected to a bridge), input impedance 50kΩ, W483 x H210 x D450mm, 40 kg
The disposal price has been reduced. Member prices are not applicable. 2024/3/7 sales price 128,000 yen Maintained! A crisp, bright, and sharp sound typical of Marantz from the 1970s. Exactly, it's an American sound on the west coast. The design is also a simple design typical of US Marantz. ※The leg is out of stock. The exterior has dullness and small scratches. Serial 4180 (Yonejima Satoshi)
Maintenance information: 2024.3.7 Maintained (single CH power stage transistor replacement. Screwdriver transistor resistor replacement. Drive Tr Capacitor Replacement Contact polishing, aging test)
Accessories: No accessories
Main specifications: 125W+125W (8Ω) W445 × H170 × D265 mm 14.8 kg
Maintained. with cabinet! A power amplifier representing the McKinn Golden Age. It has a rich, gorgeous sound with a punch, and is still a popular model. Although it is a transistor amplifier, it is an amplifier that still has a strong tubular atmosphere. The rich, thick characters reproduce the music on a rich scale. Exterior features include chips and bumps on the cabinet. Serial JCT 4858 (Murakoshi Yoichi)
Maintenance information: 2024.4.3 Maintained (electrolytic capacitors (large capacity capacitors use used products of the same type)), resistors, lamps, etc. have been replaced. Missing screws and rings added. panel paint. Solder correction. Pattern correction. Clean VR and SW connectors. Loosen the screws and tighten them. Bias and offset checks. Output audio check)
Accessories: instruction manual (copy)
Main specifications: 250W+250W (stereo 1/2/4/8Ω) 500W (mono 0.5/1/2/4/8/16Ω) input sensitivity (0.75V/2.5V) switchable W411 x H181 x D368 mm 37.2kg
This is a super dreadnought mono power amplifier. Recommended for those who want to drive large speakers! The sound quality is natural and clearly expresses delicate parts. It is a power amplifier that has driving power and allows you to feel comfortable and at ease. There are small scratches on the exterior, but it is generally good (Ryo Mizusaki)
Maintenance information: 2024.4.30 Maintained (meter acrylic removed, internal glass fog cleaning, all front lamps replaced. (Check that the lamp is on)
Accessories: power cord, instruction manual
Main specifications: 1200W (2/4/8 Ω) speaker output 1 system x 3 (2 ohm x 1, 4 ohm x 1, 8 ohm x 1) input terminal RCA x 1 system, XLR x 1 system, W445 x H313 x D540 mm 66.7 kg/unit
The price has been drastically reduced! 2024/4/28 sales price 1,380,000 yen Maintained! CELLO mono power amplifiers with low distribution volume. It is driven by Class A operation up to an output of 8W, and Class A operation with almost high texture in actual use. The sound is thick, roomy, and has a lot of information, but it is a quality unique to high-end machines that also has a sense of subtlety and sound field. RF Enterprise regular import model. As for the exterior, there are fine scratches on the top plate. Serial 0151/0152 (Fujisawa Yukishi)
Maintenance information: 2023.9.25 Maintained (replace all deteriorated capacitors. (Spec inspection)
Accessories: power cord (non-genuine), Fisher XLR conversion cable
Main specifications: 230W+230W (8Ω) 400W+400W (4Ω) W480 x H185 x D693 mm 35 kg
The price has been drastically reduced! 2024/1/18 sales price 49,800 yen Maintained! An American-made amplifier from the 1970s that can hardly be seen today. Circuits for self-preservation, such as security, correction, and protection, have been cut off, and I think that handsome atmosphere is well reflected in the sound. It has the same feeling of use as the model year (Daiki Goto)
Maintenance information: 2024.1.18 Maintained (check capacitors, resistors, transistors, etc. as is OK. bias check)
Accessories: none
Main specifications: size (actual measurement) W406 x H155 x D327 mm weight (actual measurement) 12.2 kg
The disposal price has been reduced! (Member discounts are not applicable) 2024/1/18 sales price 49,800 yen Maintained! An American-made amplifier from the 1970s that can hardly be seen today. Circuits for self-preservation, such as security, correction, and protection, have been cut off, and I think that handsome atmosphere is well reflected in the sound. It has the same feeling of use as the model year (Daiki Goto)
Maintenance information: 2024.1.18 Maintained (LED installation (original not available) poor power stage transistor deterioration, defective transistor in the board → replacement. Bias adjustment, operation check.)
Accessories: none
Main specifications: size (actual measurement) W406 x H155 x D327 mm weight (actual measurement) 12.2 kg
※It has a cigarette smell, so it's cheap. Since it is 120V specification for commercial use, it will be handed over as is. A compact commercial power amplifier that is highly regarded as a professional studio monitor amplifier. The driving power that cannot be imagined from its size is truly the real thrill of a professional aircraft. The range is reasonable, but it is characterized by a sound image that does not lose sound even at high volumes. There are scratches on the exterior. Serial 8001337592 (Tamura Eiji)
Maintenance information: 2024.4.16 Operation confirmed
Accessories: none
Main specifications: 40W+40W (8Ω) W483 x H44.5 x D213 mm 4.5 kg
*Currently sold. 120V specification. CROWN commercial power amplifier. It features driving power unique to professional use that lifts straight. The high braking power at high volume fully demonstrates the quality of a professional device. The exterior is dull. *There are no fixing brackets for mounting racks. Also, the AC plug has been replaced. Serial 8001294201 (Tamura Eiji)
Maintenance information: 2024.4.11 operation confirmed
Accessories: none
Main specifications: output 25W+25W (8Ω) 120V specification natural air cooling method W483 × H45 × D213 mm 4.5 kg
The price has been reduced! 2024/4/13 sales price 79,800 yen Maintained! Audionics of Oregon power amplifier RF regular, 117V specification In Japan, it is an American manufacturer imported by R.F. Enterprises under the name Audio of Oregon. A thick, low center of gravity sound with a punchy sound. It is an American sound suitable for jazz and rock. It can also be used as a mono power amplifier. There are exterior, dullness, small scratches, scratches on the top plate, etc. ※The plug has been changed. (YONEJIMA Satoshi)
Maintenance information: 2024.4.13 Maintained (main amplifier circuit resistor replacement. Idling current misalignment adjustment. (Distortion level check)
Accessories: No accessories
Main specifications: 170W+170W (2Ω) 120W+120W (4Ω) 70W+70W (8Ω) 225W (8Ω, when connected to BTL) AC117V 50Hz/60Hz dimensions W483 × H89 × D216 mm weight 7.7 kg
The disposal price has been reduced (member prices are not applicable). 2023/11/26 Sales price 128,000 yen Maintained in 2022/6! An eye-catching power amplifier with its black and large power meter typical of Sansui. It entertains me with its power, which can be felt from its appearance, and its supple, stretchy sound quality. The exterior has dullness, scratches, rust, etc. over time (Oikawa Tetsuji)
Maintenance information: 2022.6.23 Maintained (both channel volumes replaced. SP relay bad contact replacement. Replace protectors, deteriorated transistors, resistors, and diodes in meter boards. Replace deteriorated transistors and resistors in the power supply board. Replace deteriorated transistors and capacitors in the drive board. OUTPUT selector switch cleaning. (General adjustment)
Accessories: none
Main specifications: left and right independent 2 power supply diamond differential circuit effective output 110W+110W (8Ω) load impedance 4 to 16 ohms W482 x H187 x D450 mm 20.3 kg
Maintained. A Yamaha stereo power amplifier boasting high driving power with a damping factor of 200. The cool panel design and the impressive meter with an orange light are also attractive. Enjoy the hot sound unique to the heyday of audio. There are small wounds and dullness (Oikawa Tetsuji)
Maintenance information: 2024.4.27 Maintained (pre-drive circuit repair. Soldering fixes within each circuit. Bad output relay contact replacement. (Meter lamp power lamp deterioration replacement)
Accessories: none
Main specifications: rated output 120W+120W (8Ω) size W435 x H133 x D380 mm weight 11.8 kg
The disposal price has been reduced. Member discounts are not applicable. 2023/6/12 sales price 49,800 yen ※1 mono amplifier only. The display lamp visible through the lattice is a transistor mono power amplifier with an indescribable design. As for the sound quality, it is a powerful sound with a sense of overhang while making you feel thick, and the low frequencies are not sluggish, making you listen to a pleasant sound. The exterior is dull all over, scratches on the top plate, etc., and there is a feeling of use (Kobayashi Hitoshi)
Maintenance information: 2023.6.13 Maintained (output relay contact correction input volume disassembly contact correction protection circuit transistor replacement input terminal polish)
Accessories: none
Main specifications: effective output 150 W, input level adjustment, SNR 110 dB, dimensions W436 x H95 x D328 mm, weight 11.5 kg/1 unit
The price has been drastically reduced. 2024/3/2 sales price 99,800 yen Maintained! professional monitor amplifier It has strength unique to commercial use, and the driving power in the low range is truly remarkable. However, it also has a strong sense of temperature typical of a quad, so it is an amplifier that I would like people who are shunned when the sound is too straight for commercial use to try it once. You can see a feeling of use, such as appearance, dullness, abrasions, etc. (Kobayashi Hitoshi)
Maintenance information: 2024.3.2 maintained (internal dismantling all check, Tr, C, R check, ±B INPUT bypass C replacement, Tr, R, etc., all OK, INPUT photocoupler check, operation check)
Accessories: copy of instruction manual, power cord, dedicated SP cord (cable length 2.5 m)
Main specifications: 100W+100W (8Ω) W483 × H88 × D310 mm 12.5 kg
The price has been reduced! 2024/4/19 sales price 79,800 yen ※1 unit only. Maintained! It is originally a professional mono amplifier, but there is only 1 unit. You can feel the strong power of the sound quality even with just one unit. It seems to be useful for mono and center speakers. There are scratches and paint peeling on the exterior. Serial Q001769 (Fujisawa Yukishi)
Maintenance information: 2024.4.19 Maintained (XLR speaker cable created (3 meters)). Electrolytic capacitor replacement. ATT cleaning. Solder correction. Rubber feet added. Bias offset check. Output audio check. Input ① GND ② HOT ③ GND (unbalanced) output ① not used ② is set to plus ③ minus 8 Ω load. (Also, a pop sound is made when the power is on and off, but this is a specification)
Accessories: speaker cable, power cable
Main specifications: 8 ohms W482.6 x H88 x D320 mm weight 13 kg
The disposal price has been reduced! (Member discounts are not applicable) 2024/4/27 sales price 148,000 yen Maintained! It is a model that is small yet has a calm and glossy tone. A combination with European speakers is recommended along with the company's Pre-44. A slightly more modern taste than the 405 has been added. There is a feeling of use on the exterior, such as dullness, small scratches, and peeling paint. Serial Q078428 (Hiroki Aso)
Maintenance information: 2024.4.27 maintained (internal dismantling check, power Tr driver, Tr check, replacement of each C in the board, partial soldering, defect correction, bottom rubber foot mounting operation check)
Accessories: copy of instruction manual DIN to RCA (female) conversion cable, power cable (general purpose)
Main specifications: 100W+100W W341×H115×D195mm 9.0 kg
The disposal price has been reduced! (Member prices are not applicable) 2024/3/22 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 has a feeling of use such as dullness. Serial 41000 (Tomoho Asaine)
Maintenance Information: 2024.3.22 Maintained! (Internal check DC cut C, gain setting C, etc., exchange Tr, etc. check operation check, DIN4P-RCA female cable creation)
Accessories: power 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. 2024/3/21 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 appropriate for the model year, such as line scratches on the top plate, rubber footprints, and overall dullness (Mizusaki Ryo)
Maintenance information: 2024.3.21 maintained (internal Tn, C, R check, Tn OK, gain setting C, DC cut C, etc. → replacement, DINININPUT connector replacement, cable creation ~ operation check)
Accessories: power cord, connection cord, 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. 2024/3/20 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. You can see a feeling of use such as appearance, dullness, abrasions, scratches, stains, etc. (Kobayashi Hitoshi)
Maintenance information: 2024.3.19 maintenance (DIN connector replacement, resistance in both other channels, capacitor replacement, each Tr all check)
Accessories: connection cable, 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
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 a feeling of use such as dullness. Serial 3121 (Takasaki Atsushi)
Maintenance information: 2024.3.22 maintained (INPUT DIN4P and AC connector replacement, DIN4P-RCA x 2 (1m) creation, internal check, DC cut C, coupling C replacement, RCH offset VOL exchange, constant change in constant voltage circuit)
Accessories: copy of manual, power cord, connection cord
Main specifications: 45W+45W W120×H159×D324mm 8.2 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. The exterior has a feeling of use over time, such as dullness and small scratches. Serial 62226 (Yonejima Satoshi)
Maintenance Information: 2024.3.25 Maintained (INPUT DIN 4P replacement, internal Tr, C, R all checks. DIN4P-RCA female cable created. Operation check, pattern solder processing)
Accessories: power cable, connection cable
Main specifications: 45W+45W W120×H159×D324mm 8.2 kg