Does anyone have experience with noise reduction ?

Hi and thanks for the replies.
The source of the noise is from the inverter. What I am looking for is someone who has had success with eliminating it with a line filter. Trace states this is normal ie live with it. We can even hear it in the phone line yet I am told it is not RFI. When charging with generator noise is gone( not on inverter power only generator with batteries charging).
All grounds are to Earth Gounding rods. Wire is tight and secure.I am not on cable( nearest cable or power is 10 miles away). The video,computers etc are isolated and switched out of system when not in use. Thier are no motors or compressors on line( no ac/heat refridge is propane).
While this noise is livable as to my original complaint never a black floor to my system.
Tubes do not react the same as SS but noise is still present.
Does the Radio Shack gound filter work on AC or is it for cable only. I do not recieve TV signal wear I am located and use an outdoor 200 mile range antenna for FM. It is grounded to Earth on a separate rod from the house as a precaution from lightning strikes.

I look forward to hearing more ideas.

Hello Dave,
On many occassion I have removed the Lead from the antenna during lightning storms "just in case". I can still hear the noise and the lightning charges for that matter with it removed. All the equipment( generator etc , electrical panels boxes ,grounding buses and inverter)grounds are all tied together with bond wire as per installation and NEC requirements.The noise did not show till the inverter was installed and only occurs when it is inverting 48v. to 120v, on generator power it is not present. Buy the way the generator creates more noise from the moter running so it is more intrusive than the inverter interference.
John mentioned the MIT ISO-linQ.What are these?
The funny thing about this is one of the company engineers with Trace worked for Acoustic Research in the old days and I would think that it would be a money maker for Trace to have a solution.
As to noise on the home theater thier is usually alot of background noise in the soundtracks that it is not an issue.

Again Thanks for the replies.

My Scott tube reciever 240 b and my 222c do not produce the noise. My McIntosh solid state preamps do. It is in the transistor preamp sections that the noise is picked up .
My cheap Denon home theater receiver is quiet though so go figuire.

All the inverters I have worked with have noise in the diodes. I can run a cap across them and quiet it down or put in quality diodes. Both void warranty.