Maintenance has been completed, such as disassembling and cleaning the main volume, disassembling and polishing of each switch, replacing 31 capacitors and 13 transistors! This is a Sony premain amplifier representing the 70s. The sense of extrusion and thickness has increased, yet the Sony-like outline is an appeal not found in modern amplifiers. It's an amplifier that sounds better than it looks, and is a perfect match for vintage medium speakers such as the JBL4312 series. As for the exterior, there is a scratch on the top plate. Serial 205025 (Yonejima Satoshi)
Maintenance information: 2026.4.23 Maintained (main, balance volume dismantled and cleaned. Multiple switch disassembly and polishing (function, filter, speaker switching) switch polishing (monitor mode loudness turnover) bus, treble volume sound wave cleaning. Replace the power cord. Replace the power lamp. Capacitor replacement (14 tones, 2 phono, 15 power stages) Transistor replacement (5 tones, 2 phono, 6 power stages) AUX1 input volume replacement. Pin jack polishing, bias adjustment, interior and exterior cleaning, operation check. ※Since there is no relay, a pop sound is heard when the power is turned on. Push the SP only on the one you are using. (There is no sound when both are pressed.)
Accessories: No accessories
Main specifications: output: 35W+35W (8Ω) 40W+40W (4Ω) W400×H149×D316mm weight 8.3 kg