The price has been reduced! 2025/7/1 sales price 69,800 yen Marantz control amplifier dedicated to digital sources. It is an amplifier where you can feel the seriousness of Marantz, as it luxuriously uses thick aluminum material so as not to succumb to noise, and uses solid aluminum for the volume knob. It is equipped with a circuit that allows only signals below the sampling frequency to pass through, and the output sound is smooth and clear. The exterior has a feeling of use such as dullness. Serial MZ01827010003 (Jun Tamai)
Maintenance information: 2025.7.12 sound output confirmed
Accessories: instruction manual
Main specifications: input sensitivity/impedance 300mV/47kΩ rated output/impedance, 1.5V/50Ω SNR (A curve) 110dB W250 × H84 × D211 mm 4.2 kg
The disposal price has been reduced! 2025/6/21 sales price 150,000 yen Switch disassembly and cleaning, electrolytic capacitor transistor replacement, etc. have been fully maintained! It is a control amplifier developed based on the amplifier technology that SANSUI has cultivated over many years. The straight sound is attractive. Please enjoy the rich vintage sound by combining it with the BA-2000 or 3000. There is a small scratch on the top plate (Tomonori Asae)
Maintenance information: 2025.6.21 Maintained (main VR, low filter SW disassembly cleaning capacitor, transistor, diode, fuse replacement. Cleaning of each SW type terminal, removal of old solder from each board, flux cleaning. (Internal and external cleaning, input/output waveform check, sound output test)
Accessories: none
Main specifications: stereo control amplifier, 2 Phono inputs (mm), frequency characteristics (rated output), 10 Hz to 80 kHz, W460 x H176 x D345 mm, 9.9 kg
Comes with original box Former flagship preamp C-3850. Equipped with a “Balanced AAVA” volume that has further evolved to the extreme. The ultimate preamp that combines an unprecedented high SN and sense of energy as an analog pre. The quality is still attractive enough (Sasaki Shota)
Maintenance information: 2025.7.24 Operation confirmed
Accessories: original box, remote control, manual, power cable, cloth
Main specifications: Balanced AAVA volume equipped with LINE input 6 systems, balanced input 6 systems, LINE output 2 systems, balanced output 2 systems, W477 x H156 x D412 mm 25 kg
Kriskit's line-only control amplifier. Simple circuit configuration without phono input. Although it is a domestic product, it has a crisp, well-extruded American sound, very similar to Dinakit. The exterior is generally dirty and dull (Mizusaki Ryo)
Maintenance information: 2025.7.16 Operation confirmed
Accessories: none
Main specifications: 4 line inputs, 1 phono system, W380 x H110 x D235 mm, 3.3 kg
The price has been drastically reduced. 2025/7/18 sales price 328,000 yen Maintained! Rare amplifiers have arrived. A preamp that has the transparency and subtlety of a high-end while maintaining a KREL-like sense of temperature. Built-in high sound quality head amplifier compatible with MC/MM. Since the gain is so high, there is a slight sound leak even when the volume is turned off. There are scratches and line marks on the exterior. Serial 4396, 4397 (Fujisawa Yukishi)
Maintenance information: 2025.7.18 Maintained (power supply unit ground resistor replaced due to burnout, volume gap, volume disassembly cleaning, equalizer amplifier capacitor defect replacement, ground terminal damage replacement, DC offset readjusted for each amplifier. (Specification inspection, inspection of each operation)
Accessories: connection cord
Main specifications: [main body] W483 x H63 x D340 mm 8.2 kg [power supply part] W483 x H63 x D305 mm 9.3 kg [transformer] W95 x H60 x D335 mm 4.2 kg
The price has been reduced. 2025/7/17 sales price 138,000 yen Maintained including 26 capacitors, 4 fuses, and 1 lamp replacement! A popular DENON control amplifier for its excellent phono equalizer. MC head amplifiers are famous for their quality, and they fully draw out the amount of information in the cartridge. It's a neat sound typical of a domestic amplifier with clear yet solid mid-range sound. There is a scratch on the cabinet (Oikawa Tetsuji)
Maintenance information: 2025.7.17 Maintained (volume, selector switch, balance volume, cleaning. Transistor magnetization removal. Electrolytic capacitor replacement. Replace the fuse resistor and power lamp. (Panel, terminal, and housing cleaning)
Accessories: copy of instruction manual
Main specifications: CR equalizer with 3 PHONO inputs MC head amplifier W455 x H132 x D357 mm 10.5 kg
The price has been reduced. 2025/7/19 sales price 138,000 yen Maintained including 75 capacitors, 4 resistors, and 1 lamp replacement! A popular DENON control amplifier for its excellent phono equalizer. MC head amplifiers are famous for their quality, and they fully draw out the amount of information in the cartridge. It's a neat sound typical of a domestic amplifier with clear yet solid mid-range sound. There is a scratch on the cabinet (Mizusaki Ryo)
Maintenance information: 2025.7.19 Maintained (both PHONO1, 2, and 3 do not produce L or R sounds, improved by exchanging resistors in the PHONO board. AC cord replacement where the power sometimes goes out due to a faulty AC cord. The power lamp does not light up, and the power pilot light was replaced. Main volume disassembly and cleaning, MAX/MIN stopper damage replacement. Replace 75 power capacitors. Balanced volume contact cleaning. Clean all mechanical switch disassembly contacts. Soldering fixes for each board. Board cleaning. In-circuit power supply voltage regulation. Output DC offset adjustment. Internal cleaning. Internal harness, rewiring. Clean panels and knobs. RCA terminal, GND terminal, exterior screw cleaning)
Accessories: copy of instruction manual
Main specifications: CR equalizer with 3 PHONO inputs MC head amplifier W455 x H132 x D357 mm 10.5 kg
Maintenance has been completed, such as replacing capacitors and disassembling and polishing switches! A control amplifier representing Mackin's golden age. Compared to the C28, this model has a wider range and more subtlety. The rich, glossy, and thick tone is alive and well, and it plays particularly well with vintage speakers. There is a feeling of use on the exterior, such as scratches and dullness over time. Serial JBZ4959 (Yamato Yuki)
Maintenance information: 2025.6.26 maintained (each SW, VOL cleaning lamp replacement, push button, poor contact dismantling, cleaning, BASS, TREBLE direct soldering, glass panel peeling correction, pin jack cleaning, auto onboard part capacitor replacement balance, operation check balance knob adhesive ※ noise during BASS-TRBLE switching cannot be removed any more)
Accessories: copy of instruction manual
Main specifications: frequency characteristics 20 Hz to 20 kHz input terminals PHONO 1 2, AUX, TUNER, TAPE 1, 2 W406 × H138 × D330 mm 8.6 kg
All switches have been disassembled and maintained, such as contact cleaning! Macintosh's classic preamp. It reproduces clear mid-range and glossy tones. This model should be used by music fans who enjoy all kinds of sources. The full range of functions, such as a 5-band equalizer and a 7-source input selector, is also attractive. It is a relatively beautiful individual for its age. The front panel is also beautiful. Serial EB3208 (Fujisawa Yukishi)
Maintenance information: 2025.7.21 maintained (each SW/VOL cleaning, push button dismantling and cleaning, lamp deterioration replacement, fuse broken replacement, pin jack cleaning)
2016.9.10 Maintained (changed to AC100V specification, windshield peeling correction, companion ratio adjustment, VOL failure → replacement adjustment, each VOL/SW Gari → all cleaning, front push SW Gari → all dismantled contact plate polishing, operation check)
Accessories: No accessories
Main specifications: Equalizer up and down 12dB (center frequency/30Hz/150Hz/500Hz/1.5kHz/10kHz) rated output 20W+20W (8Ω) W445 x H192 x D395 mm 11.8 kg
The price has been reduced! 2025/7/6 sales price 258,000 yen All switches have been disassembled and maintained, such as contact cleaning! Macintosh's classic preamp. It reproduces clear mid-range and glossy tones. This model should be used by music fans who enjoy all kinds of sources. The full range of functions, such as a 5-band equalizer and a 7-source input selector, is also attractive. There are small scratches and partial peeling on the exterior. Serial JEB8721 (Eternity Miraito)
Maintenance information: 2025.5.14 Maintained (solder fixed due to RCA terminal solder disconnection. Due to poor contact between the push switch and rotary switch, all switch disassembly contacts are cleaned, and contact grease is applied. Main volume disassembly contact polishing cleaning. A conversion board was created and replaced due to poor contact with the COMPADNAR when the sound was interrupted when the relay was turned on. Electrolytic capacitor replacement. Panel lamp replacement Panel peeling correction. (Check the operation of each input/output)
Accessories: none
Main specifications: Equalizer up and down 12dB (center frequency/30Hz/150Hz/500Hz/1.5kHz/10kHz) rated output 20W+20W (8Ω) W445 x H192 x D395 mm 11.8 kg
The price has been reduced! 2025/7/15 sales price 118,000 yen 24 transistors and 9 capacitors were replaced. Furthermore, all switches and volumes have been disassembled and polished, and maintenance has been carried out on Yamaha's famous C-2! It has a particularly good reputation for phono, and it is still a popular model among analog users. With a natural and highly transparent Yamaha sound, you can fully enjoy the appeal of acoustic instruments, such as the touch and feel of a piano, and the sharpness of guitar strings. The exterior has dullness and scratches. Serial 04437 (Fujisawa Yukishi)
Maintenance information: 2025.5.3 maintained (all volumes and switch disassembly contacts polished. Replace 24 deteriorated transistors and 9 capacitors in the tone control circuit power supply circuit. (I/O pin jack polish)
Accessories: No accessories
Main specifications: PHONO x 3 system (MM/ MC) MC head amplifier built-in W435 x H72 x D320 mm 7.9 kg
The disposal price has been reduced! (Member prices are not applicable) 2025/5/10 sales price 49,800 yen Maintained! A preamplifier equipped with a simple design and function, and full control functions, such as independent left and right gain adjustments, and impedance selectors for various cartridges. The clear sound without habit is a product preferred by multi-system owners. Each load capacity can be set to 6 types depending on the cartridge load, and the volume uses a 32-step attenuator type with silver-printed contacts. Dullness, small scratches, etc. can be seen on the exterior. Serial WH1005774 (Yonejima Satoshi)
Maintenance information: 2025.5.10 maintained (4 electrolytic capacitors in the FLAT AMP board replaced, 14 FLAT amplifier board transistors replaced, 10 INPUT board transistors replaced, power lamp replacement, other cartridge LOAD/SW2 locations, INPUT SW, TAPE SW disassembly contact polishing and cleaning grease coating, power cable replacement, disassembly contact cleaning on both left and right GAIN volume, volume VR replacement . (Since it is a VR replacement for volume, the number of clicks is different and the volume scale does not match)
Accessories: No accessories
Main specifications: differential 2-stage current mirror amplifier A grade SEPP power consumption 10W dimensions W420 x H81 x D357 mm weight 6.3 kg
The price has been reduced! 2025/6/21 sales price 138,000 yen Maintained! A popular DENON control amplifier for its excellent phono equalizer. MC head amplifiers are famous for their quality, and they fully draw out the amount of information in the cartridge. It's a neat sound typical of a domestic amplifier with clear yet solid mid-range sound. On the exterior, you can see a feeling of use such as dullness and scratches on the cabinet, serial 1115798 (Asaine Tomoho)
Maintenance Information: 2025.6.17 Maintained (Electrolytic Capacitor 20% Capacity Change, 10 parts replaced. Main volume disassembly contact cleaning. MIN/MAX stopper damage replacement balance volume contact cleaning mechanical switch disassembly contact cleaning each board soldering confirmation and correction board cleaning. Power supply voltage regulation. Output DC level adjustment Internal harness re-wiring Internal cleaning AC plug, RCA terminal, GND terminal cleaning Exterior screw cleaning, wood panel cleaning, front panel knob cleaning)
Accessories: copy of instruction manual
Main specifications: CR equalizer with 3 PHONO inputs MC head amplifier W455 x H132 x D357 mm 10.5 kg
The price has been reduced. 2025/7/2 sales price 138,000 yen All switches and volume disassembly contacts have been maintained, such as polishing. A popular DENON control amplifier for its excellent phono equalizer. MC head amplifiers are famous for their quality, and they fully draw out the amount of information in the cartridge. It's a neat sound typical of a domestic amplifier with clear yet solid mid-range sound. You can see a feeling of use, such as appearance, dullness, abrasions, etc. (Kobayashi Hitoshi)
Maintenance information: 2025.7.2 maintained (13 PHONO capacitors replaced, long sound output test) 2025.6.20 maintained (all switches and volume disassembly contacts polished. Defective relay contact replacement. Replace the power lamp. The internal capacitor etc. have been replaced by another company, and the modified part has been restored to its original state. (I/O pin jack polish)
Accessories: copy of instruction manual
Main specifications: CR equalizer with 3 PHONO inputs MC head amplifier W455 x H132 x D357 mm 10.5 kg
The price has been reduced. 2025/7/15 sales price 89,800 yen Nakamichi's thin control amplifier compatible with Phono MM/MC. The sound quality is straight with little coloring, so you don't have to choose a power amplifier to match. There are line marks on the top plate, small scratches, dullness, etc. (Oikawa Tetsuji)
Maintenance information: 2025.7.15 operation confirmed
Accessories: none
Main specifications: Phono MM/MC equipped W435 x H67 x D287 mm 5.1 kg
In addition to replacing a total of 10 capacitors, every corner of the SW has been cleaned and maintained! A control amplifier representing the golden age of McKinn. Compared to the C28, this model has a wider range and more subtlety. The rich, glossy, and thick tone is alive and well, and it plays particularly well with vintage speakers. There is a feeling of use on the exterior, such as line damage or dullness. Serial JBZ7967 (Jun Tamai)
Maintenance information: 2025.7.19 maintained (each SW, VOL cleaning, push button dismantling and cleaning, lamp deterioration replacement, bridge diode deterioration replacement, auto on-board capacitor replacement, glass panel peeling correction (text part not possible), pin jack cleaning, headphone noise → capacitor fluid leak replacement, some bubble noise remains when switching between BASS and TREBLE.)
Accessories: copy of instruction manual
Main specifications: frequency characteristics 20 Hz to 20 kHz input terminals PHONO 1 2, AUX, TUNER, TAPE 1, 2 W406 × H138 × D330 mm 8.6 kg
All substrates have been maintained, such as soldering fixes, switches, volume disassembly, contact polishing, etc. A popular DENON control amplifier for its excellent phono equalizer. MC head amplifiers are famous for their quality, and they fully draw out the amount of information in the cartridge. It's a neat sound typical of a domestic amplifier with clear yet solid mid-range sound. You can see a feeling of use, such as appearance, dullness, abrasions, etc. (Kobayashi Hitoshi)
Maintenance information: 2025.7.5 maintenance completed (1 panel LED replaced. PHONO circuit board and all other circuit boards have been soldered and corrected. Switch, volume disassembly contact polishing. (I/O pin jack polish)
Accessories: copy of instruction manual
Main specifications: CR equalizer with 3 PHONO inputs MC head amplifier W455 x H132 x D357 mm 10.5 kg
The price has been reduced. 2025/7/16 sales price 258,000 yen Maintenance has been completed, such as switch cleaning, glass panel peeling correction, etc. Signed by Gow! Macintosh's classic preamp. It reproduces clear mid-range and glossy tones. This model should be used by music fans who enjoy all kinds of sources. The full range of functions, such as a 5-band equalizer and a 7-source input selector, is also attractive. There is a feeling of use such as slight dullness. Serial EB3654 (Takasaki Atsushi)
Maintenance information: 2025.7.15 maintained (selector SW contact plate cleaning, switching transistor, IC, etc., operation check) 2025.7.8 maintained (phono part installation, various SW/VOL cleaning (equalizer cracks cannot be removed), push button SW dismantling and cleaning, glass panel peeling correction, pin jack cleaning, lamp replacement, company noise → relay (Pot replacement, operation check)
Accessories: copy of the manual
Main specifications: Equalizer up and down 12dB (center frequency/30Hz/150Hz/500Hz/1.5kHz/10kHz) rated output 20W+20W (8Ω) W445 x H192 x D395 mm 11.8 kg
Yamaha's famous C-2a has been revived after replacing 29 deteriorated capacitors, and the volume and switches were completely dismantled and thoroughly cleaned. The transparency and three-dimensional effect of the sound have been brilliantly revived. I recommend this one for those who like natural, crisp sound in the mid to high range with good texture. The sound of the PHONO input is good, so it is a popular amplifier for analog fans. There are small wounds, dullness, etc. (Oikawa Tetsuji)
Maintenance Information: 2025.7.17 Maintained (Electrolytic Capacitor Replacement. Transistor magmentation removal. Volume, selector disassembly cleaning. Damages, modifications, and partial fixes. (Panel, terminal, and housing cleaning)
Accessories: copy of instruction manual
Main specifications: PHONO input 2 systems (MM/MC) DC amplifier configuration W435 x H72 x D320 mm 7.9 kg
The price has been reduced. 2025/6/28 sales price 258,000 yen Maintenance has been completed, such as glass panel peeling correction, input board capacitor replacement, etc. Macintosh's classic preamp. It reproduces clear mid-range and glossy tones. This model should be used by music fans who enjoy all kinds of sources. The full range of functions, such as a 5-band equalizer and a 7-source input selector, is also attractive. You can see a feeling of use on the exterior, dullness, rust, small scratches, etc. (Kobayashi Hitoshi)
Maintenance information: 2025.6.28 maintenance completed (each SW, VOL cleaning, lamp replacement, push button cleaning, pin jack cleaning, glass panel peeling correction, input board capacitor replacement, fuse replacement, operation check of each part (there is a slight gap left on the equalizer))
Accessories: copy of instruction manual
Main specifications: Equalizer up and down 12dB (center frequency/30Hz/150Hz/500Hz/1.5kHz/10kHz) rated output 20W+20W (8Ω) W445 x H192 x D395 mm 11.8 kg
The price has been reduced. 2024/11/8 Sales price 258,000 yen Volume contacts have been cleaned and maintained! Genuine Electri Macintosh's classic preamp. It reproduces bright, glossy tones with clear mid-range sounds. This model should be used by music fans who enjoy all kinds of sources. The fact that it has a full range of functions, such as a 5-band equalizer and a 7-source input selector, is also attractive. On the exterior, there are parts where oxidation, partial peeling, and light is leaking out. Serial JEB8913 (Fujisawa Yukishi)
Maintenance information: 2024.6.15 Maintained (MODE switch disassembly contact polishing contact grease application, installation fixed. Push switch disassembly contact cleaning contact grease application. Other volume contact cleaning. Electrolytic capacitor replacement, panel lamp replacement, panel peeling correction. (Check the operation of each input/output)
Accessories: copy of instruction manual
Main specifications: Equalizer up and down 12dB (center frequency/30Hz/150Hz/500Hz/1.5kHz/10kHz) rated output 20W+20W (8Ω) W445 x H192 x D395 mm 11.8 kg
The disposal price has been reduced! Member prices are not applicable. 2025/5/3 sales price 118,000 yen Maintained! Yamaha's masterpiece preamp. It has a particularly good reputation for phono, and it is still a popular model among analog users. With a natural and highly transparent Yamaha sound, you can fully enjoy the appeal of acoustic instruments, such as the touch and feel of a piano, and the sharpness of guitar strings. Stains and dullness are conspicuous on the top plate. Serial 12672 (Murakoshi Yoichi)
Maintenance information: 2025.5.2 Maintained (reduction treatment and cleaning of poor contact parts with sulfide gas on all switches. (All input/output terminal function tests) 2024.10.6 maintained (Ethanol cleaning and oxidation prevention treatment are performed after injecting a reducing agent to remove the oxide coating on all rotary switches and lever switches. (After disassembling the 6 consecutive volume and balance volume, clean the carbon surface and brush surface, then apply anti-oxidation treatment)
Accessories: copy of instruction manual
Main specifications: PHONO x 3 system (MM/ MC) MC head amplifier built-in W435 x H72 x D320 mm 7.9 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
Maintenance has been completed, such as replacing 30 capacitors and cleaning volume switch disassembly contacts. Yamaha's famous C-2a. The transparency and three-dimensional effect of the sound have been brilliantly revived. I recommend this one for those who like natural, crisp sound in the mid to high range with good texture. The sound of the PHONO input is good, so it is a popular amplifier for analog fans. The exterior has dullness, bumps, and dirt marks. Serial 04453 (Tamura Eiji)
Maintenance information: 2025.6.29 Maintained (power supply voltage drops due to poor EQ circuit transistor EQ circuit transistor replacement. Increased soldering due to poor contact with the MC amplifier. Volume switch disassembly contact cleaning contact grease application. The electrolytic capacitor was replaced due to deterioration. The exterior is very dirty, so I cleaned it. Offset voltage, idling current adjustment. Check each input/output operation.)
Accessories: none
Main specifications: PHONO input 2 systems W435 x H72 x D320 mm 7.9 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 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. Externally, there are scratches on the top plate. Serial 29341 (Fujisawa Yukishi)
Maintenance information: 2025.6.21 Maintained (PHONO/LINE board joint connector part solder removal, pattern cleaning. (Replace a total of 22 in-board coupling capacitors and bypass capacitors)
Accessories: connection cable, power 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