is it buzzing or humming? it is unclear from both of your posts what exactly the problem is.
You may have something as simple as a ground loop. have you tried cheater plugs or ground loop isolator? do you have a cable tv near your system or on the same circuit?
what are your components? all of them including the non-McCormack gear. What have you attempted to fix the problem?
Provide more detail. your description is not really clear.
You may have something as simple as a ground loop. have you tried cheater plugs or ground loop isolator? do you have a cable tv near your system or on the same circuit?
what are your components? all of them including the non-McCormack gear. What have you attempted to fix the problem?
Provide more detail. your description is not really clear.