Grimace, you can get hum in many ways.
Sometimes it is because the system components are plugged into different breakers.
My JL Audio subs will hum because they are plugged into a different dedicated circuit and they are on the opposite side of the breaker box than the rest of the system. But once the rest of the system is wired up and powered on the hum goes away completely.
But many times it is caused by cable TV connections.
Be it interconnects, power cables etc. You can buy isolation adapters that connect to the cable coax that will eliminate that hum.
With all that being said, and if all else fails, hum can drive me absolutely crazy. If it could be determined which component is causing the hum, then I would disconnect the ground in the outlet that component is plugged into.
Sometimes it is because the system components are plugged into different breakers.
My JL Audio subs will hum because they are plugged into a different dedicated circuit and they are on the opposite side of the breaker box than the rest of the system. But once the rest of the system is wired up and powered on the hum goes away completely.
But many times it is caused by cable TV connections.
Be it interconnects, power cables etc. You can buy isolation adapters that connect to the cable coax that will eliminate that hum.
With all that being said, and if all else fails, hum can drive me absolutely crazy. If it could be determined which component is causing the hum, then I would disconnect the ground in the outlet that component is plugged into.