Maintained! A class stereo power amplifier that uses a fully balanced push-pull system for all stages. You can enjoy the sound quality unique to Class A amplifiers, which are delicate and have a high texture. It is a popular amplifier for vocals and classical music fans. The exterior has dullness and small scratches, but it is a beautiful individual compared to its age. Serial K1W197 (Fujisawa Yukishi)
Maintenance information: 2026.4.17 Maintained (both channels corrected due to damage to the input ATT click mechanism, contact cleaning, output relays, push switches, and electrolytic capacitors replaced. Solder correction. Bias and offset checks. I checked the output sound.)
Accessories: instruction manual
Main specifications: Class A amplifier left and right independent twin mono configuration 50W+50W (8Ω) dimensions W475 x H170 x D408 mm weight 22 kg
The disposal price has been reduced! (Member prices are not applicable) 2026/4/9 sales price 1,480,000 yen balance short pins are in stock. Maintained by Herman in September 2024! An advanced stereo power amplifier composed of traditional fully balanced circuits. An ultra-authentic model that combines not only a sense of horsepower and scale from a 400W output, but also a sense of subtlety and sound field. The sound is even more fine-grained than before, and works well with modern high-end speakers. There are a few threads on the exterior. Serial 1021 (Fujisawa Yukishi)
Maintenance information: Maintained by Harman on 2024.9.30 (mechanical assembly replacement, inspection and adjustment)
Accessories: instruction manual, power cord, original box, balance short pin
Main specifications: 400W x 2 (8Ω) gain 26.8dB power consumption 135W (when no signal) 1,731W (rated output) 5W (when sleeping) W445 x H243 x D539 mm 55.3 kg
12 capacitors have been replaced, and maintenance such as disassembling and polishing attenuators and switches has been completed! Pure A grade power amplifier by Luxman et al. Please enjoy the thick sound quality, which combines softness and strength. Mono drive with BTL connection is also possible. Dullness, there are small dents (Daiki Goto)
Maintenance information: 2026.4.16 Maintained (input attenuator, changeover switch, rear panel changeover switch disassembly contact polishing. Left and right pre-drive circuit adjustment volume, 2 capacitors, 12 capacitors, deterioration replacement. Replace 2 idling current adjustment volumes in the power amplifier section. Bad output relay contact replacement. Digital meter level adjustment All soldering on each circuit board has been fixed. (When input is balanced, the entire input volume does not pass through, so it becomes MAX)
Accessories: copy of the manual
Main specifications: stereo output 55 W+55 W (8 ohms) pure A grade operation, mono output, 220 W (balanced input), frequency characteristics, 5 Hz to 300 kHz, direct reading type level indicator, W444 x H211 x D417 mm, 22 kg
A best-selling power amplifier that strongly reflects thick lackstones in the mid and low frequencies. The high range has been widened and transparency has also been improved. It is a relaxed, LUXMAN sound with sex appeal and smoothness. It is also possible to upgrade to mono use with a BTL connection. There are threads and stains on the top plate, and dirt on the back. Serial W80611151C (Yonejima Satoshi)
Maintenance information: 2026.4.19 Operation confirmed
Accessories: power cable
Main specifications: 150W+150W (8Ω) RCA/XLR input with attenuator mounted on the back size W467 x H212 x D440 mm weight 26.6 kg
Maintained by the manufacturer! This is the final model of the POA-3000 series. The imposing exterior has a thick sense of energy, and the smooth high frequency with a glossy finish make you feel the real thrill unique to separate amplifiers. Even now, it is a highly affordable power amplifier. The exterior is generally beautiful, although repair marks remain on the side wood. Other than that, there are some small scratches and dullness, etc., and a feeling of use. Serial 0091500270 (Takahashi Nobuyuki)
Maintenance information: 2026.4.18 Exterior maintenance completed (side wood exterior repair/polishing) Maintained (speaker terminal replacement front panel door partial disassembly adjustment push switch disassembly cleaning input volume contact correction meter board soldering correction meter ZERO POINT adjustment power amplifier board capacitor replacement speaker relay contact cleaning amplifier board soldering Correction idling adjustment, internal cleaning terminal cleaning, power cable replacement, operation test performed) Exterior maintenance completed (side wood exterior repair/polishing)
Accessories: copy of instruction manual
Main specifications: rated output 250W+250W (8Ω) W495 x H200 x D490 mm 35.5 kg
100V specification. Both GAIN VOL channels have been dismantled, cleaned, and maintained by replacing capacitors, diodes, etc.! 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 JBL vintage speakers is exceptional. On the exterior, the meter panel is slightly discolored, has small scratches and dullness, and there is a feeling of use (Katsuji Hiura)
Maintenance information: 2026.4.17 maintenance completed (GAIN VOL both channel dismantling and cleaning, meter SW cleaning, meter board, driver board, power supply board C, diode, lamp replacement. (Power stage TR status OK, SP relay contact cleaning, panel grip correction, meter section cleaning.)
Accessories: instruction manual
Main specifications: 200W+200W (1/2/4/8Ω) input sensitivity 0.75/2.5V W411 × H181 × D368 mm 38.6 kg
The price has been drastically reduced! 2026/4/15 sales price 148,000 yen Full disassembly of the front switch, including cleaning, and maintenance has been completed! An impressive power amplifier with a large VU meter. Pursue a real phase amplifier configuration that reproduces accurate phase and sound fields. The stable driving power supported by a strong power supply unit and a high level of transparency with a neutral tone are attractive. Dullness and a feeling of use can be seen. (FUJISAWA KOSHI)
Maintenance information: 2026.4.11 Maintained (LR main volume dismantled and cleaned. Output relay replacement. Meter lamp replacement. Switch disassembly and polishing. Main amplifier part solder repair. (Interior and exterior inspection and cleaning, operation confirmation)
Accessories: No accessories
Main specifications: 200W+200W (8Ω) real phase amplifier method W465 x H187 x D426 mm 25 kg
Maintained! Marantz's masterpiece stereo power amplifier. It uses Motorola transistors and is modestly sized yet boasts excellent US driving power. The natural yet rich, extruded yet comfortable American sound is addictive. You can see a feeling of use such as appearance, dullness, scratches, etc. (Kobayashi Hitoshi)
Maintenance information: 2026.3.10 maintained (AC on ~ double channel distortion → output mute circuit relay contact failure → polishing, C replacement in relay drive, power stage Tr x 1 characteristic defect → replacement, other Tr checks)
Accessories: none
Main specifications: differential amplification, pure complementarity, full stage direct connection OCL circuit, 125W+125W (8Ω) dimensions W391 x H146 x D264 mm weight 13.6 kg
*There is no operation problem, but since the speaker terminals and capacitors have been replaced, it is currently sold. Lo-D power amplifier. It seems that it was sold for mini components at the time. How about using it as an introduction to separate amplifiers (Daiki Goto)
Main specifications: W320 x H145 x D250 mm weight 6.2 kg (actual measurement)
※There is no operation problem, but since repairs cannot be made in the future, it is sold as is. An ultra-compact, high-quality digital power amplifier that can be used in various situations. Although it is small, the output is high, and it is very easy to use. It has high resolution and clear sound quality. The volume starts at -30db, so even if you narrow it down to zero, there is a slight sound (Daiki Goto)
Maintenance information: 2026.4.16 Operation confirmed
Accessories: manual, power cable, original box
Main specifications: 100W+100W (8Ω) frequency characteristics 5 to 50 kHz S/N ratio 120dB W132 x D240 x H43 mm approx. 650 kg
35 deteriorated parts, including capacitors and transistors, have been replaced, and maintenance has been completed, such as dismantling and cleaning the main volume! A power amplifier with a characteristic large meter. A straightforward tone with no peculiarities. There is momentum unique to the 80s, and you can enjoy crisp sound quality. It is also ideal as an introduction to separate amplifiers. The exterior has many scratches and dullness over time, and there is a chip on the upper part of the windshield panel. Serial 82113035 (Yamato Yuki)
Maintenance information: 2026.4.15 Maintained (power amplifier circuit part power transistor and transistor replacement, capacitor replacement LR main volume dismantling cleaning meter lamp, indicator lamp replacement output relay, meter relay replacement, power switch mechanism correction, interior and exterior inspection and cleaning, glass panel removal and cleaning, bias adjustment, meter adjustment, operation check. (*Part of the indicator lamp has broken down)
Accessories: copy of instruction manual
Main specifications: 130W+130W (8Ω) 170W+170W (4Ω) frequency characteristics 1Hz to 100kHz impedance 4Ω to 16Ω W450 × H174 × D422mm 18.5 kg
Maintained! The RCA terminal has been replaced with a banana-compatible SP terminal. 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. Serial 3803 (Tamura Eiji)
Maintenance information: 2026.4.15 Maintained (power stage Tr, driver Tr check. Replace part C and R deterioration in the board. Input DIN terminal rewiring, operation check, RCA, speaker terminal screwing.)
Accessories: power cable
Main specifications: 100W+100W frequency characteristics 20 to 20 kHz dimensions W341 x H115 x D195 mm weight 9 kg
Yamaha's thin, heavyweight stereo power amplifier. A Yamaha sound that sounds cool while feeling a sense of power. The bass has more damping than it looks, and it's powerful. The simple and clean design is also attractive. There are some scratches and scratches on the exterior. Serial E084728Y0 (Tamura Eiji)
Maintenance information: 2026.4.15 Operation confirmed
Accessories: instruction manual
Main specifications: 460W+460W (4Ω) 200W+200W (8Ω) W438 ✕ H116 ✕ D486mm 24.0 kg
The price has been reduced. 2026/4/12 sales price 148,000 yen High power amplifier boasting 200W output for each channel. It is equipped with a large toroidal transformer that makes this possible, a large capacity 60,000 μF capacitor, and 10 high-current transistors for each channel. It demonstrates high performance in terms of both expressiveness and resolution. It's slightly dull (Daiki Goto)
Maintenance information: 2026.4.12 Operation confirmed
Accessories: manual, power cable, original box
Main specifications: rated output 500W (20-20,000 Hz, 0.09% THD,8) total harmonic distortion ratio 0.003% (20-20,000 Hz, at rated output) mixed modulation distortion ratio 0.09% (60 Hz: 7000 Hz = 4:1, at rated output) peak current 120A input sensitivity/impedance line (RCA) 1.6V/12k (XLR) 2.5V/100K damping factor 800 (20- 20,000 Hz) frequency characteristics 10-100,000 Hz (± 1 dB) S/N ratio (IHFA network) 116 dB power consumption 550 W W431 x D407 x 150 mm 18 kg
The price has been reduced. 2026/4/7 sales price 29,800 yen*There is a gap in volume, and the CH A side lamp is out, so it is cheap and is currently sold. Commercial power amplifier with VU meter. It is naturally cooled and has no fans, so it is quiet. There are scars and dullness overall (Oikawa Tetsuji)
Maintenance information: 2026.4.7 operation confirmed
Accessories: none
Main specifications: stereo output 150W+150W (8Ω) bridge 400W (8Ω) W480 x D410 x H100 (mm) 17 kg
The disposal price has been reduced! Member prices are not applicable. 2026/3/31 sales price 448,000 yen, 31 deteriorated parts, including capacitors, have been replaced and maintained! A teleo power amplifier with a traditional dual mono configuration. The overwhelming driving power and precise sound are attractive. You can enjoy the strong driving power that allows even a 38cm woofer to brake well, and the hot sound unique to Levinson of this era. Genuine Harman The exterior has dullness over time, small scratches, and bumps. Serial 1190 (Yonejima Satoshi)
Maintenance information: 2026.3.31 Maintained (replaced with deteriorated parts (23 capacitors, 8 resistors). There was deterioration in part of the solder, and it was fixed. Other inspections and adjustments))
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
*Currently sold. Yamaha commercial power amplifier. There are many scratches, dullness, and tape marks on the top plate (Oikawa Tetsuji)
Maintenance information: 2026.4.7 operation confirmed
Accessories: none
Main specifications: 80W+80W (8Ω/STEREO), 110W+110W (4Ω/STEREO), 220W (8Ω/BRIDGE) W48 x H103.5 x D455mm 12 kg
*Currently sold. Yamaha commercial power amplifier. The fan is slightly louder. There is a general wound (Oikawa Tetsuji)
Maintenance information: 2026.4.7 operation confirmed
Accessories: none
Main specifications: 80W+80W (8Ω/STEREO), 110W+110W (4Ω/STEREO), 220W (8Ω/BRIDGE) W48 x H103.5 x D455mm 12 kg
Maintained including replacement of 15 transistors, 13 capacitors, 12 lamps, and 2 volumes. The flagship model of the Macintosh power amplifier at the time. The heavyweight frame, fresh blue meter, and large speakers drive lightly, and the rich, rich tone are just perfect. The clarity of low frequency contours is the highest among all Mackins of all time. There are small scratches and dullness appropriate to the model year (Oikawa Tetsuji)
Maintenance information: 2026.4.6 maintained (GAIN vol failure → both channels replaced
Panel meter dismantling cleaning meter display lamp replacement driver board Tr deterioration, C deterioration, power stage Trxl deterioration → replacement each connector cleaning pattern re-solder mode switching SW dismantling cleaning operation check, offset, bias adjustment)
Accessories: power cable
Main specifications: 500W+500W (1000W when mono) equipped with power guard circuit W483 x D465 x H263 mm 60.3 kg
The price has been reduced. 2026/3/30 sales price 89,800 yen Manufacturer maintenance completed. It is a model that pursues performance by narrowing down functions and simplifying signal paths. It's a well-balanced, natural, ROTEL-like sound with no sense of exaggeration. They can handle a wide variety of music genres without excesses or deficiencies. You can see a feeling of use, such as appearance, dullness, abrasions, etc. (Kobayashi Hitoshi)
Maintenance information: 2026.3.27 Maintenance completed (4 electrolytic capacitors and fuses have been replaced. Improved input changeover switch contacts. (Attach 1 rubber cap to DC OFFest, check idling)
Accessories: power cable
Main specifications: output 200W+200W (8Ω) W440 x H139 x D365 mm weight 15.5 kg
The price has been reduced. 2026/3/26 sales price 79,800 yen It is a model that pursues performance by narrowing down the functions and simplifying the signal path. It's a well-balanced, natural, ROTEL-like sound without any sense of exaggeration. They can handle a wide variety of music genres without excesses or deficiencies. The exterior of the serial 953-5401146 has small scratches and a dull feeling of use. There are some cracks on the SP terminal cover (Hiura Katsuji)
Maintenance information: 2026.3.22 sound output confirmed
Accessories: power cable
Main specifications: output 200W+200W (8Ω) W440 x H139 x D365 mm weight 15.5 kg
The disposal price has been reduced! (Member prices are not applicable) 2026/3/12 sales price 448,000 yen 27 deteriorated parts, including capacitors, were replaced in 2021/10! A stereo power amplifier with a traditional dual mono configuration. The overwhelming driving power and precise sound are attractive. You can enjoy the strong driving power that allows even a 38cm woofer to brake well, and the hot sound unique to Levinson of this era. Genuine Harman There are small scratches and dullness over time. Serial 1047 (Yamato Yuki)
Maintenance information: 2021.10.2 Maintained (deteriorated capacitors, resistors, POT replacement. (Inspection and adjustment)
Accessories: Remo pin instruction manual copy power cable short plug
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
43 capacitors, 6 semi-fixed resistors, 4 lamps, 2 relays have been replaced, and maintenance has been completed, such as disassembling and cleaning the various volumes and switches. 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. There are scratches, dullness, etc. on the top plate (Oikawa Tetsuji)
Maintenance information: 2026.2.24 Maintained (left and right speaker output relays replaced, A/B changeover switch dismantling, cleaning, transistor magmentation removed. Electrolytic capacitors, semi-fixed resistors, lamp replacement. Input volume cleaning. Disassemble and clean the panel and rear changeover switch, clean the knobs, housing, and rear terminals. (Other parts readjusted, aging tests)
Accessories: copy of instruction manual
Main specifications: output 100W+100W (8Ω) SNR 115dB W436 x H151 x D370 mm 26 kg
Maintained! It's a thick amplifier that you can't imagine 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. The urethane coating on the exterior has deteriorated, faded white, and some paint has peeled off (Wang Zhan)
Maintenance information: 2026.2.18 Maintained (pin jack replacement, power stage TV check, deteriorated capacitor, resistor replacement, operation check, due to specifications, pop noise appears when the power is turned on)
Accessories: copy of instruction manual, power cable.
Main specifications: output 140W+140W (8Ω) frequency characteristics 20Hz to 20kHz (-0.5dB) 13Hz to 40kHz (-1.0dB) total harmonic distortion ratio 0.01% or less (up to 130W 100Hz/1kHz) input sensitivity 0.5V input impedance approx. 20kΩ crosstalk 100dB (100Hz) 85dB (1kHz) 65dB (10kHz) S/N ratio 105 dB speaker minimum load 4 Ω external Dimensions W321 x H134 x D240 mm Weight 12 kg
Maintained, including volume replacement. Late wide panels. Macintosh's first power amplifier with a balanced circuit configuration. Resolution and transparency have been increased while keeping the traditional rich tone of McKinn intact. The blue meter, which can be said to be synonymous, is alive and well, and it's visually pleasing. There is peeling on the front panel, small scratches on the side, and dullness on the top plate (Oikawa Tetsuji)
Maintenance information: 2025.12.28 maintained (VOL characteristics poor in both L and RCH, → replacement meter with original vol, illumination lamp burned → replacement capacitor deterioration replacement power, meter SW internal warpage → reinforcement correction)
Accessories: instruction manual
Main specifications: 300W+300W (2/4/8Ω), 600W during MONO (2/4/8Ω) W445 x H196 x D420 mm 35 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. Serial 15733 (Yamato Yuki)
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 the instruction manual, power cord, connection cord
Main specifications: 45W+45W W120×H159×D324mm 8.2 kg
The disposal price has been reduced. Member discounts are not applicable. 2026/1/11 sales price 128,000 yen Maintenance completed in 2013/1. 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, dullness, chipping, bruises, abrasions, etc. can be seen (Kobayashi Hitoshi)
Maintenance information: 2026.1.10 operation confirmed 2013.1.18 maintenance completed (each inspection adjustment, RCA terminal installation, VR replacement input/output, balance waveform measurement operation confirmed)
Accessories: power cable, copy of instruction manual
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 prices are not applicable. 2025/12/24 sales price 128,000 yen 32 capacitors have been replaced, switches have been disassembled and cleaned and maintained! This amplifier has a reputation for use in multiple systems. The original powerful sound, which has a wide range and is clear, has been revived. It is thin and can be used for a wide range of purposes, from sub to multi-use. The exterior has noticeable rust stains on the top plate (Mizusaki Ryo)
Maintenance Information: 2025.12.24 Maintained (Electrolytic Capacitors, Tantalum Capacitors, Semi-fixed Resistors, Lamps, Cushions Replaced. Disassemble and clean the slide switch. Clean the housing, panel, and rear terminals. (Each part has been readjusted)
Accessories: copy of instruction manual
Main specifications: 80W+80W (B grade) 18W+18W (A grade) DC amplifier configuration W480 x H80 x D380 mm 8.6 kg
The disposal price has been reduced. Member prices are not applicable. 2025/12/11 sales price 128,000 yen The input terminal, 4 capacitors, 7 resistors have been replaced, etc. Maintenance has been 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. There are scratches on the top plate and sides, paint peeling, etc. (Oikawa Tetsuji)
Maintenance Information: 2025.12.11 Maintained (INPUT pin jack replaced
DIN connector without wiring → rewiring TN check in both channel boards OK gain setting C, DC cut C replacement, some resistors NG → replacement)
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 discounts are not applicable) 2025/11/19 sales price 128,000 yen Maintained! RCA and VOL have been added, so it's easy to use. The exterior is painted black. 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 is dull and has small scratches over time. Serial 8508 (Yonejima Satoshi)
Maintenance information: 2025.11.19 Maintained (internal all inspection → Lch power stage Tr, gain setting C, INPUT VOL replacement. DIN SP rewiring, first drive IC OP AMP replacement)
Accessories: power cord
Main specifications: 100W+100W frequency characteristics 20 to 20 kHz dimensions W341 x H115 x D195 mm weight 9 kg