>  That's one way to almost create a star grounding pattern electrically. 
 > Now, did you reference your audio ground to that same breaker box? A 
 > potential ground loop situation could be if you are using more than one 
 > outlet in the same duplex rectacle, then there "can" be a shorter p > No 
 > /more problems path between the two devices on that outlet than the star 
 > grounding.
   Actually, I used "I" too loosely. I am in a wheelchair 90% of the time so 
I 
had an electrician friend do the runs as I rooted him on from beneath. Here 
in 
Arizona conduit isn't normally used in residential construction for some 
reason (although we used it). And grounding back to the box is hardly ever 
done either. This is also a right to work state. No unions. So when a 
subdivision of say 400 homes like this one is built, there is one 
electrician. 
He checks off the wiring that was done by the labor crews during the day 
before. Not real inspiring!
   Also, with 115 degrees and higher outside, the attics where the wiring is 
done gets up around 200. Mine is specially vented for the length of the house 
with a false peak opening, covered by a second overlapping peak and a big 
exhaust fan at one end. Still, you cannot spend much time up there, so you 
have a tendency to OVERKILL a job just to make sure it is right and you don't 
have to go back up there.
   No matter how we vent our Central Air, it still makes a racket if you 
expect to stay cool. There are a few things you can do to minimize the noise, 
but we will always have some. Another dumb thing they do out here is put the 
Central Air/Heat Pump units on the roofs! They save big bucks on duct work 
that way. But, it makes it even noiser than standard air units.
   So, winters are our best audio season.
Cheers & Have a Nice Holiday Weekend!
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