Refresh maintenance completed! We have replaced a total of 104 deteriorated parts, including electrolytic capacitors and transistors. A power amplifier with a die-cast chassis with all-stage Class A operation. Contrary to its appearance, rugged sound is a finely stretched sound. It combines the delicate reproduction typical of an A class amplifier with thick sound quality, and reproduces vocals and classical music smoothly. The exterior has dullness over time, small scratches, and slight rust, and there are places where floating can be seen on the paint. There is a slight crack in the speaker terminal. Serial WF1002729 (Yamato Yuki)
Maintenance information: 2022.12.25 Maintained (replace deteriorated parts, re-solder all boards, perform board cleaning, and heat sink paint); exterior cleaning and heatsink painting ※ There is a slight smell when heat comes out due to the balance of paint aging transistors, electrolytic capacitors, heat dissipation sheets, semi-fixed resistors, relays, connectors, diode exchange circuit adjustments, input/output waveform confirmation, load test (1 kHz sine wave, 8 ohm load time: 30W+30WOK) test)
Accessories: copy of instruction manual
Main specifications: Class A operation/DC amplifier configuration Effective output 30W+30W damping factor 60 Power consumption 240W Dimensions W420 x H153 x D370 mm Weight 22 kg
The whole body has been fully maintained! A power amplifier with a die-cast chassis with all-stage Class A operation. Contrary to its appearance, rugged sound is a finely stretched sound. It combines the delicate reproduction typical of an A class amplifier with thick sound quality, and reproduces vocals and classical music smoothly. Speaker terminal cover is missing. The paint and feeling of use can be seen throughout (Murakoshi Yoichi)
Maintenance information: 2023.7.20 maintenance (continuous operation test for power transistors, 6AFUSE replacement, DC offset, idle current, and FUSE at 4A.) 2023.6.30 Maintenance (replacement of transistors and power supply capacitors. DC offset, idle current regulation, physical testing.)
Accessories: none
Main specifications: Class A operation/DC amplifier configuration Effective output 30W+30W damping factor 60 Power consumption 240W Dimensions W420 x H153 x D370 mm Weight 22 kg
The price has been drastically reduced! 2023/3/31 sales price 69,800 yen maintenance completed! A power amplifier with a die-cast chassis and all-stage A-class operation. Contrary to its appearance, rugged sounds are fine and stretchy. It achieves both the delicate reproduction and thick sound quality typical of Class A amplifiers, and plays vocals and classical music smoothly. The exterior has age-like dullness and small scratches. Serial WJ1005915M (Yonejima Satoshi)
Maintenance information: 2023.3.31 Maintained (idling current, offset voltage regulation. Retighten the power transistor flange screw. Barister exchange. Condensers have been maintained. Relay contact inspection. (Voice check)
Accessories: copy of instruction manual
Main specifications: Class A operation/DC amplifier configuration effective output 30W+30W damping factor 60 power consumption 240W dimensions W420 x H153 x D370 mm weight 22 kg
The whole body has been fully maintained! A power amplifier with a die-cast chassis that performs all stages of Class A operation. Contrary to what it looks like, rugged sounds are fine and stretchy. It achieves both the delicate reproduction and thick sound quality typical of Class A amplifiers, and plays vocals and classical music smoothly. There is a crack in the speaker terminal cover. There is a lot of feeling of use such as rust and dirt on the exterior (Murakoshi Yoichi)
Maintenance information: 2023.3.20 maintenance (semiconductor, power supply capacitor replacement, DC offset, idle current setting, physical test.) Maximum output: 38W, rated distortion ratio: 0.005% or less, residual noise: 180μV (terminated)
Accessories: none
Main specifications: Class A operation/DC amplifier configuration effective output 30W+30W damping factor 60 power consumption 240W dimensions W420 x H153 x D370 mm weight 22 kg
The whole body has been fully maintained! A power amplifier with a die-cast chassis that performs all stages of Class A operation. Contrary to what it looks like, rugged sounds are fine and stretchy. It achieves both the delicate reproduction and thick sound quality typical of Class A amplifiers, and plays vocals and classical music smoothly. The speaker terminal cover is missing. Rust, paint, and feeling of use can be seen throughout the exterior and transformer parts (Kobayashi Hitoshi)
Maintenance information: 3.22 maintained (power transistor pair replacement, heat dissipation treatment redone, pilot lamp replacement, replacement of all migration generating semiconductors, replacement of power supply capacitors, DC offset, idle current setting, physical test, maximum output 38W, rated distortion ratio 0.005% or less, residual noise: 180μV (termination) There is damage to the resin part of the SP terminal, but arrangements are not possible)
Accessories: none
Main specifications: Class A operation/DC amplifier configuration effective output 30W+30W damping factor 60 power consumption 240W dimensions W420 x H153 x D370 mm weight 22 kg
The whole body has been fully maintained! A power amplifier with all-stage A operation in a die-cast chassis. Contrary to its appearance, rugged is a sound with a fine elongation. It achieves both delicate reproductions typical of Class A amplifiers and thick sound quality, and plays vocals and classics smoothly. There is a crack in the speaker terminal cover. There is a scratch on the back of the heat sink. Serial WE1001789 (Mizushima Itsuro)
Maintenance information: 2022.6.17 Maintenance (main power supply diode replacement, replacement of all Tr capacitors that can be checked for deterioration, main chassis cleaning after removing all structures from the main chassis, re-cleaning the main chassis Assembly, DC balance offset reset, running test)
Accessories: copy of instruction manual
Main specifications: Class A operation/DC amplifier configuration Effective output 30W+30W Damping factor 60 Power consumption 240W Dimensions W420 × H153 × D370mm Weight 22kg
The price has been reduced! 2021/12/2 selling price 69,800 yen. The whole body has been fully maintained! A power amplifier with all-stage Class A operation in a die-cast chassis. Contrary to its appearance, the rugged sound has a fine stretch. It combines both the delicate reproduction typical of a Class A amplifier and the thick sound quality, and smooth reproduction of vocals and classics. There is a feeling of use such as rust on the whole. Serial J1005685M (Itsuro Mizushima)
Maintenance information: 2021.12.2 Maintenance completed (replacement of all corroded semiconductors, electrolytic capacitors replaced, inspected and corrected all points of board solder, complete disassembly with all structures removed from the base Water washing of aluminum die-cast base and radiator in the state, cleaning of transformer/main capacitor, correction of paint peeling part of transformer and radiator, output relay disassembly, contact oxidation removal, surge killer start-up capacitor (Replacement, first-stage Tr temperature compensation section correction, DC balance reset, idle current reset, CA test)
Accessories: Copy of instruction manual
Main specifications: Class A operation/DC amplifier configuration Effective output 30W+30W Damping factor 60 Power consumption 240W Dimensions W420×H153×D370mm Weight 22kg