Maintained! It is a mono amplifier with excellent characteristics of Class A amplifiers, with uninterrupted bass coming out as if it were groaning forward and forward. It has a thick, thick sound that is rare for Yamaha, and it drives a variety of speakers both domestically and internationally. You can see a feeling of use, such as appearance, dullness, abrasions, etc. (Kobayashi Hitoshi)
Maintenance information: 2024.9.29 maintenance completed (replacement of 50 decoupling capacitors, correction of bus bar polishing, replacement of 4 output relays, replacement of speaker terminals, expansion of output elements, etc., wiring styling correction, bias and offset check, output sound check)
Accessories: instruction manual (copy)
Main specifications: pure A grade 100W mono W271 x H230 x D488 mm 18.4 kg
Maintained! It is a mono amp that often shows the characteristics of Class A amplifiers, where the bass without slack comes out as if groaning forward. It has a thick, thick sound that is rare for Yamaha, and it drives a variety of speakers both domestically and internationally. There is a feeling of use such as dullness. Serial 01939 01944 (Takasaki Atsushi)
Maintenance information: 2023.3.31 Maintained ([01944 side] primary side fuse replacement, internal inspection including 01939 side performed bias and offset check output voice check.)
2019.7.31 Maintained ([01939 side] primary side fuse replacement large capacity capacitor mounting part replacement due to urethane deterioration, ground plate position adjustment, capacitor mounting position adjustment, bias and offset check, output check, power consumption check.)
2017.3.18 Maintained ([pair] mute, DC relay exchange, capacitor replacement, solder repair, increase tightening of output elements, etc., bias and offset check, output check, interior and exterior cleaning)
Accessories: instruction manual
Main specifications: pure A grade 100W mono W271 x H230 x D488 mm 18.4 kg/unit