Maintained including 36 capacitors, 11 transistors, input volume, and adjustment volume replacement. 70s Sony pre-main amplifier. The sound has few quirks, yet it has a firm outline, and a fresh sound with a pleasant thickness and overhang. It has an appeal that is a bit different from the current model. There are small scratches and dullness appropriate to the model year (Oikawa Tetsuji)
Maintenance information: 2026.5.9 maintained (① main, balance volume dismantling and cleaning ② multiple switch disassembly and polishing (function, filter, speaker switching) ③ switch disassembly and polishing (monitor, mode, loudness, turnover) ④ bus, treble volume sound wave cleaning ⑤ power cord replacement ⑦ capacitor replacement (14 tones, 7 phono, 15 power), transistor replacement (5 tones, 2 phono, power) 4 steps), adjustment volume, resistance exchange ⑧ AUX1 input volume exchange ⑨ pin jack polishing, bias adjustment, inspection. Since there is no relay, a pop sound is heard when the power is turned on.
Push the speaker switch only if you are using it. There is no sound when both are pressed.
Accessories: copy of instruction manual
Main specifications: Phono2 system output 35W+35W (8Ω) 40W+40W (4Ω) W400×H149×D316mm 8.3 kg