This McIntosh MAC 4100 came in for a bench test and control cleaning. The amp section was found to be putting out less power than spec and hard clipping early. A good reconditioning was done and the receiver will break in for several hours before going home. A mix of the highest quality audio capacitors were used. All harnesses were cleaned to ensure a good connection. This is the best you can do to bring back the receiver back to it’s former glory.

First up was the power supply

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Preamp

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Amp boards

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Power supply filter caps

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Volume control boards

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EQ board

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