disconnect each component separately and ascertain if the hum still exists to determine which unit is causing what is most likely a "ground loop"---or use a cheater plug on each unit and see if it takes away the ground loop--but cheater plugs as a permanent solution is never a good idea since it floats away the ground. Sometimes using shielded interconnects or balanced ones can help as well.Theres alot written on solving ground loops on the internet---
HUM when I switch on components-
Ever since I switched over from my older integrated amp (marantz 2325) to newer, high end separates, I have an annoying audible "hum" coming from my system---of course my first thought is that something is not properly grounded (house electrical system)--, or possibly one of the components is culprit? or? I am sure many of you have been through this in the past--was hoping you might be able to help me to "trouble shoot" and figure out how best to address this problem--house is old--but all electric was redone with modern wiring etc---do not have details on fuse box in basement, etc. thanks---
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