Quote:

I didn't mean to muddy the discussion, but part of my problem is that I have a 20-amp outlet as required by the Furman, and this outlet is tied back to the same ground as the outlet in the other room containing the rest of the studio equipment. This prevents the ground loop between the bedroom that is the control station and the other bedroom that is the recording space.




Well, the real answer to that one is that it might -- and it might not -- eliminate possible AC Ground Loop audio interference problems.

Little understood, but what really causes the problem are two separate paths to AC Ground that are of differing resistance. This means that, even though those two outlets may be "tied to the same ground" they could still have different *lengths* of ground connects, causing the problem anyway.

Think about this: ALL AC sockets in your house, if wired properly, are "tied to the same ground" back at the panel.

My advice to recordists on this subject is simple enough: Don't worry about the AC Ground Loop problem unless confronted with it.

In other words, connect things up and if there is no noise, be happy.

If you do encounter noise of the AC Ground Loop variety, the fizzy sounding continual buzz on audio lines, then go ahead and apply methods to correct it such as isolation transformers, etc.


--Mac

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