I had a similar issue. Since I knew my amplifier's circuit was on the opposing phase/leg at the service panel, I moved that circuit to the same phase/leg (at the service panel) of my other components. As I was curious to see what sonic benefits would result.
I did not notice any sonic benefits, but that coming and going little amplifier transformer hum went away.
That little transformer hum still re-appears but only when the microwave oven is in use.
Not saying you have the same exact problem, but it's worth a shot.
-IMO
I did not notice any sonic benefits, but that coming and going little amplifier transformer hum went away.
That little transformer hum still re-appears but only when the microwave oven is in use.
Not saying you have the same exact problem, but it's worth a shot.
-IMO