Hello Sal,  You might have to do what I ended up doing. I had to run 
seperate isolated line from the breaker box to my audio area and my office 
for my computers and audio gear there. I used hospital grade plugs (very 
important!) and a good quality conduit in addition to the best wire I could 
find. I only wanted to do it once and have it work correctly so I spent about 
$50 more than I could have gotten away with. I had each line grounded all the 
way back to the box. Sometime later I installed a second box and moved just 
the audio and computer lines over to it.
        Before the wiring, everytime someone used something in the kitchen I 
heard it through my system. No amount of type of surge, EMI filter or line 
isolation and stabilization units would stop it. I could also hear anything 
electrical being started in the garage. Everytime the central air (heatpump) 
turned on, I could hear the interference in my system and see it on the TV 
screen.
        There might be more sophisticated and less expensive ways of dealing 
with your problem. Mine answer cost me about $200 before I added the second 
box. But in looking at the options I choose this as I now know I will never 
have to worry about this particular part of my system again.
        Please let us know what you decide, how it works and what it costs, 
here in the Echo. This is a problem we all face to one degree or another and 
an area of great interest to many. Your solution can be added to the lessons 
learned file.
Cheers, John
--- Maximus/2 3.01
---------------