Transistors, capacitors have been replaced, slide volume dismantled and cleaned, etc. have been maintained! More than 50 years have passed since the release of Sony's vintage pre-main. The innocent tone doesn't make you feel stressed is good, and the balance from treble to bass is good, and the tone control response is good. The retro-futuristic design also makes a good impression. *This unit does not use a speaker protection relay, so it may make an abnormal noise when the power is turned on and off, but this is a specification. There is a scratch on the cabinet on the exterior (Oikawa Tetsuji)
Maintenance information: 2024.12.18 Maintained (replacement due to defective transistors, replacement of capacitors, etc. in flat amplifiers, replacement of equalizer circuit capacitors, slide domain VR disassembly and cleaning, disassembly and cleaning of FUNCTION switches, etc.)
2024.6.13 Maintained (board repair due to poor contact within the TONE board, replaced 4 transistors with PHONO noise, replaced with semi-fixed VR adjustments due to unstable idling voltages, repaired contacts with poor contact at each push SW contact, and disassembled and cleaned volume slide VR.)
Accessories: none
Main specifications: 35W+35W (8Ω) input sensitivity/impedance Phono 1.2mV/47kΩ Phono 2 system Tuner 1 system AUX 2 system Tape 2 system AC100V, 50 Hz/60 Hz 100 W 400 x H149 x D316mm weight 9.8 kg