In this second article on the Marantz SC-80 and SM-80, we look at the SM-80 power amplifier and a tricky repair and restoration. The Marantz SM-80 stereo power amplifier is a reasonably powerful, well-made, mid-range consumer amplifier from around 1990. It typically sold with its companion, the Marantz SC-80 preamplifier and I have just finished […]