Marantz SC-80 Preamplifier Repair

A customer recently asked me to look at his immaculate Marantz SC-80/SM-80 pre/power combo. In this article, I look at the SC-80 preamplifier. The Marantz SC-80, and its partner, matching Marantz SM-80, are quality mid-range separates hailing from around 1990. They are unremarkable in terms of circuit layout and construction,…

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