Puritan
Puritan PSM156
Ground Master City
Route Master
Worst comes to worst
you run new ground rods and install a Ground Master connected to those ground rod/s
AC hum
Had a Mini split ac unit installed, because a new line was installed in the panel I had to have a full home surge protector installed at the box( now code). Now I have ac hum through the speakers in both of my systems. Other than having the house re-grounded, is there any device I can plug into the wall socket to get rid of the noise? Any assistance would be appreciated.