Technics SU-7700Ⅱ pre-main amplifier from the late 70s. The exterior is quite clean, with almost no paint peeling on the top panel and no noticeable large scratches. There are, of course, minor scratches and corrosion due to it being nearly 50 years old. The internal components are clean due to use and storage in a low-dust environment. PHONO operation is unconfirmed due to the lack of a record player, and the sub-sonic filter operation is also unknown. AUX and TUNER inputs work without issues, and both MAIN and REMOTE outputs are OK. Volume and tone controls currently have no scratching noise. Switches may cause scratching or poor contact, especially the LOUDNESS switch, which often remains in the ON state on the right channel even when set to OFF.
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