Static and high pitch noise from active PA system

Jun 4, 2018
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Hello everyone,
I have an active PA system that produces static noise when a train, tram or car passes by or when an electric switch is put on in anywhere in the building.
How can I solve this please?
 

jay32267

Admirable
Check your grounds. Check to make sure the all the grounded plugs are good. If there's a turntable....that needs to be grounded.

THEN....check all the outlets and makes sure those are TRULY GROUNDED.
 
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