Put all on the same phase and tried A and B phase and still the same hum in the right speaker mostly heard in mid driver. They are saying they can run a diagnostic with a computer hooked up and it test every circuit to find out where the harmonics and or noise is coming from and checks all grounds as well. They are talking about some kind of harmonic filter that can be applied. I think I should move forward with this and figure out what the problem is,
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