For anyone that read my comments...do proceed with caution.
Star grounding, and other thoughts that have been mentioned
on grounding, are all trying to take care of system ground
noise(or worse), or trying to get rid of ground loop
problems. The concern, however, is to not cause a different
ground potential between components that could result in
a shock potential. So, what to do? Even though I have
a background in consumer electronics..and electrical repair
in the Air Force...I cannot, via internet long distance,
make sure that anything anyone does is safe. My problem
in my system was that the cable feed was grounded to my
electrical conduit comming into my house..and that my cable,
like many, had quite a bit of DC voltage on it. I removed
their grounding strap...ran a real earth ground for the
cable input..and installed the Mondial Magic behind my
TV for good measure..and my Stereo(there's an old term)
sounds much, much better for it. For David and all above,
do proceed with caution and/or get some advice/help from
someone that understands....ie: find an electrician that's
into the high-end...if you can. The only advice that I
think is proper....deal with getting ground concerns taken
care of before they are attached to your electical feed..not
after...ie: get that cable feed or satelite feed earth
grounded to bleed off any DC or other noise before it is
introduced to your electrical system...rather than the
"cableguy" just attatching it to your electrical..all that
is doing is making sure there is a common ground..and no
difference of potential..ie: shock concern..but it is not
addressing if or if not the cable or satelite has anything
on it's ground that should not be there/or bleed off before
the feed is introduced to your system in the first place...
But...and that's a BIG BUTT...I cannot over state how many
of you out there have systems that sound a GREAT deal poorer
than they should because of ground noise/DC voltages on the
circuits you have your system connected to.