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Hum and 2 vs 3 prong power cords

1540 Views 2 Replies 3 Participants Last post by  EC
I have a hum issue with my HT. i don't want to bore people with the complex details so I'll get to the point.

I have 5 separate circuits in a sub panel. This sub panel is not totally separate from the main panel.

I have 3 power amps: Anthem MCA 3 (RCA/XLR), Aragon 2005 (RCA only), Classe CA-150 (RCA/XLR). The least offensive is the Anthem. The Aragon and the Classe both hum to varying degrees and uses a three prong power cord. The Anthem uses a 2 prong power cord and doesn't hum at all.

The interesting test is when I plug the Aragon or the Classe into a cheap 3 prong automotive/outdoor extension cord. The cord is somewhat defective because when I rock the plug/extension cord connection, the hum goes on and off. When I plug either amp straight into the wall, it hums.

My question is this? Is it dangerous to me or to the 3 prong amps, if I remove the ground pin on the 3 prong plug? Will static build up or will I get shocked? The Anthem has 2 prongs and it never hums. And I'm guessing the ground connection in the automotive extension cord is wonky that's why I can make/break the ground connection.
1 - 3 of 3 Posts
Removing the 3rd pin or AC ground lift is a danger.

You may want to read the 3rd sticky in this section. It has some troubleshooting tips for hum.
1 - 3 of 3 Posts
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