Getting a new primitive home theater up and running in an old rental home. When I say old, I mean two-prong outlet only. And since we're renting, we cannot rewire (and no cold water pipes seem to be nearby). I do have a fairly nice power conditioner, but of course cannot connect the grounding prong. So, if I run the coax thru the conditioner, can it be an effective ground? (it does seem to be grounded outside to the house ground). Or is it pointless to use the conditioner without the grounding plug??? Ahead of time, many thanks.