※Since it is a commercial device, there is no problem with the as-is operation, but since there is no guarantee, it is inexpensive. The sound quality is clean, fresh, and light, and the sound is firm and crisp. The sound development is such that the image that comes to mind when using the word YAMAHA for commercial use fits perfectly. You can see a feeling of use, such as appearance, dullness, abrasions, etc. (Kobayashi Hitoshi)
Maintenance information: 2024.5.21 Operation confirmed
Accessories: copy of instruction manual, power cord
Main specifications: stereo output 105W+105W (4Ω) 100W+100W (8Ω) bridge output 210W (8Ω) frequency characteristics 20Hz-50kHz damping factor 200 input terminal XLR, phone, output terminal 5WAY binding post power consumption 150W W480 x H880 x D456mm 12 kg
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. The exterior is dull and scratched from use over time. Serial AX6653 (Tomonori Asaine)
Maintenance information: 2024.5.25 maintained (each SW VOL cleaning, lamp replacement, relay contact polishing power meter SW crack → internal reinforcement driver board capacitor replacement, power stage transistor check resistor replacement, additional meter board resistor installation capacitor replacement)
Accessories: copy of instruction manual
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
The disposal price has been reduced! (Member discounts are not applicable) 2023/5/9 sales price 198,000 yen Maintained! This power amplifier was released around the same time as the SG620. It combines 100W+100W driving power with good sharpness. It reproduces thick sounds unique to JBL from a simple design with only a power switch on a black body. It goes well with 70' SJBL speakers and drives exhilarating. The exterior has front scratches, bends on the power switch, scratches, and repair marks on the top plate. Serial 10623 (Yamato Yuki)
Maintenance information: 2024.3.2 Maintained (timer relay installed (speaker will be turned on 5 seconds after power is turned on. (Please turn off the VOL when the power is on). Power SW bending correction (deformation of the knob itself is not compatible). Power stage Tr check. (Replacement of Tr in the board, level VOL, fuse holder, and C in the power supply board)
Accessories: power cable
Main specifications: T-type circuit adopted 100W+100W W432 ✕ H132 ✕ D355mm 19kg
Maintained in 2015. 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. There is deterioration in exterior paint (Murakoshi Yoichi)
Maintenance information: 2015.9.12 maintenance completed (internal power transfer → malt plane deterioration → dismantling and reinstallation, exchange of both channel in-board bypass C, gain setting C, etc., TR check → OK, operation inspection check)
Accessories: power cord
Main specifications: output 140W+140W (8Ω) W321×H140×D238mm 12kg
The price has been reduced! 2024/5/25 sales price 250,000 yen power amplifier with dual monaural configuration. This model has a small output yet has driving power, and since the signal path has been shortened, it makes you feel more powerful than the specs. You can fully enjoy the sound, intensity, and thickness unique to Levinson at an affordable price. There is a feeling of use on the exterior, such as dullness and small scratches. Serial 1520 (Hiroki Aso)
Maintenance information: 2024.5.20 sound output confirmed
Accessories: copy of instruction manual Remo pin power cable (general purpose product)
Main specifications: 50W+50W (8Ω) 100W+100W (4Ω) 200W (8Ω MONO) input sensitivity/impedance 1V/50kΩ (balanced/unbalanced) W483 × H175 × D370 mm 19 kg
Self-made 4ch power amplifier using 4 Flying Mall digital power amplifiers DAD-M1. The construction is solid, and the sound is high resolution, just like a flying mall. Recommended for those who want to save space and use it for multiple purposes. The exterior has a feeling of use such as dullness and small scratches (Hiroki Aso)
Maintenance information: 2024.5.20 sound output confirmed
Accessories: power cable
Main specifications: DAD-M1 rated output 160W/4Ω 100W/8Ω frequency characteristics DC to 25kHz/4Ω DC to 50kHz/8Ω S/N ratio 120dB overall size W270 × H162 × D290 mm weight 6 kg (actual measurement)
Self-made 4ch power amplifier using 4 Flying Mall digital power amplifiers DAD-M1. The construction is solid, and the sound is high resolution, just like a flying mall. Recommended for those who want to save space and use it for multiple purposes. The exterior has a feeling of use such as dullness and small scratches (Hiroki Aso)
Maintenance information: 2024.5.20 sound output confirmed
Accessories: power cable
Main specifications: DAD-M1 rated output 160W/4Ω 100W/8Ω frequency characteristics DC to 25kHz/4Ω DC to 50kHz/8Ω S/N ratio 120dB overall size W270 × H162 × D290 mm weight 6 kg (actual measurement)
*Currently sold. JBL/UREI professional power amplifier Dynamic sound with clear contours and momentum. The driving power that makes it easy to drive even large speakers at a high volume is attractive. It can also be used as mono power by connecting to a bridge. There are conspicuous abrasions on the exterior and top plate, and a feeling of use such as dullness and scratches can be seen (Kobayashi Hitoshi)
Maintenance information: 2024.5.19 Operation confirmed
Accessories: none
Main specifications: 150W+150W (8Ω) 300W+300W (4Ω) input 2 systems (phone/XLR) W483 x H180 x D260 mm approx. 20 kg
Maintained! A power amplifier using the AB/LR independent power supply system, which is a further development of the A class B class 2 independent power supply system. Contrary to its solid appearance, it has a beautiful sound with a sense of transparency. The sound quality is moderately tight and firm, and it naturally handles crisp and energetic intonation expressions. The exterior has small scratches and dullness appropriate for the model year (Oikawa Tetsuji)
Maintenance information: 2024.5.12 Maintained (replacement of defective output relay contacts. (Replace deteriorated capacitors in power supply circuits and other circuits)
Accessories: none
Main specifications: 100W+100W (8Ω) compatible speakers 4Ω to 16Ω SNR 110dB W420 x H166.5 x D300 mm 19.2 kg
The flagship model of the Macintosh power amplifier with a silver panel. It is characterized by its rich sound. The extrusion is strong and goes great with JBL large monitor speakers. The dynamism in the mid to low range, which is difficult to obtain with current Mackin power amplifiers, is attractive. There are scratches, dullness, and discoloration in places (Kojima Yosuke)
Maintenance information: Maintained on 2020.8.26 (2 input volumes, 4 semi-fixed volumes, 2 RCA plugs, 12 lamps, 8 electrolytic capacitors, replacement input mode switch disassembly cleaning, card edge cleaning, soldering, bias and offset check, output sound check)
(*The interior and exterior have been cleaned.)
Accessories: power cable
Main specifications: 500W+500W (1000W when mono) equipped with power guard circuit W483 x D465 x H263 mm 60.3 kg