It was overhauled in 2020/2, such as replacing the RCA terminal/SP terminal/coupling condenser with an oil condenser. This model is based on the concept of making sounds even more straightforward than the MQ60. The speaker terminals have been changed to banana plug specifications, making it easier to use. The warmth of the tone and the indescribable luster sound are truly lackstones. There is rust, dullness etc. over time on grills etc. (Oikawa Tetsuji)
Maintenance information: 2026.6.16 Operation confirmed
2020.2.12 Maintained (SW/VR junction refinement, electrolytic capacitor, coupling capacitor, rectifier diode, vacuum tube socket, semi-fixed resistor, SP terminal, RCA terminal, fuse, and spark killer replacement. Exterior cleaning, circuit adjustment, waveform confirmation, load test, sound output test)
Accessories: none
Main specifications: used vacuum tube 50C-A10 x 4 12BH7A x 2 6267 x 1 EF86EH x 1 output 25+25W (4/8/16 ohm switch switching) speaker output 1 system W410 x H160 x D205 mm 13.8 kg