Yamaha M-4 repairE17 ELECTRONICSMar 311 min readUpdated: May 12Rated NaN out of 5 stars.Very nice set: Yamaha M-4 plus Control Amplifier C-4Fault: Left channel overload also preamp needs service...Yamaha M-4 Yamaha amplifier Yamaha C-4 repairYamaha C-4 amplifier repair
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