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Chassis ground and balanced mode - please help me

Plinius SA 102 has a ground switch (open vs. chassis) that they specify should be set to Chassis when running in balanced mode.

1. I assume that this has to do with achieving proper noise cancellation - but if not can someone straighten me out?

The problem: I am trying to run the Plinius with a Pass Labs X1 pre in balanced mode. There is a LOUD ground loop hum when ground is set to chassis that goes away in open position. Floating one of them does not help.

2. If I power the Plinius and the Pass using two separate lines back to my panel, will this ground loop problem be removed?

3. Will I be able to solve this problem?
jsteigert

Showing 1 response by marakanetz

marakanetz's avatar
marakanetz
5,473 posts
 
1. most-likely there is no problem
2. if this occures i believe either plinius or pass is not true-balanced and actually uses balanced receptacles in unbalanced cicruit.
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