Almonduck,
Something else you may want to try,... reversing the non polarized plug of the marantz 180 degrees in the electrical receptacle outlet. One direction should be quieter than the other.
Noise, hum and AC polarity
.
Something else you may want to try,... reversing the non polarized plug of the marantz 180 degrees in the electrical receptacle outlet. One direction should be quieter than the other.
Noise, hum and AC polarity
.