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Need suggestions please! Electrical noise in my system and it's driving me crazy!

So I have been battling with an electrical noise in my home since I moved in over a year ago. I've had two electricians check it out and have done hours of trouble shooting myself. 

I'm getting a hum or a buzz from anything with a transformer and a buzz through my speakers. Standard driver speakers and my Maggies. The house was built ten years ago and has everything up to code. Underground electrical lines. 2 ground rods outside the house. Just added a ground to all the copper plumbing and gas lines. I have a 200 amp panel in the house and a 100 amp panel in the garage. 

I have a Furman IT Reference 15 power conditioner and it's not doing jack. It's actually humming too. As far as trouble shooting I've mixed and matched equipment, speaker, and cables to eliminate that factor, I've also turned every breaker off one by one to find if it's something in the house that's dirtying up the electrical but even when I only had the one breaker that powered me system on, the noise was still there. 

I'm going crazy because my relaxing time is sitting and listening to my music in a dead silent room with a dead silent background and I no longer have that anymore. I can hear the buz, hum, and even a high pitch noise and it's ruining my hobby. Both electricians I've had in the house have no clue and and think I'm nuts anyway. 

Has anyone had an issue like this before? Could you fix it? How did you fix it? Please help! I'm about ready to sell all my equipment because it's annoying to listen to. 

Thanks,
Brian
gearheadmac

Showing 4 responses by nutty

nutty
3,006 posts
 
I also recently eliminated a hum by disconnecting my CATV from my system. After 
re-grounding it, removing the ground and trying power conditioners, I could not eliminate it until I unhooked the coax from the system. 

N
nutty
3,006 posts
 
jea48,
By re-grounding-  I removed the old grounding connectors, (both phone and CATV) at the grounding rod and at the exterior (outside) cable junction box. I Cleaned the stake with a wire wheel, (to remove rust or oxidation) and reinstalled new 12 awg solid ground wire and connectors. 

I still had the (((hum))). With the system on and the volumn at a reasonable level, I disconnected the coax from the cable box and the (((hum))) disappeared. 

This was my particular situation. I hope it helps.

N
nutty
3,006 posts
 
jea48,
The main rod was installed when the house was built. It was installed as the main ground for the home. However as you suspected, it is within a few feet of the main service panel and the Phone and CATV service is all there as well. The main rod is grounded with a large solid wire, 8 or possibly 6 awg. I ran new leads for the phone, CATV within the exterior boxes as well as hard wiring it directly to the main rod. The results were the same. The (((hum))) was present until I removed the coax from the system. 

N


nutty
3,006 posts
 
jea48
Jim,
For your guidance, I shut down the main breaker located in the main box before any of the connections were repaired...All new connectors and new solid 12 awg ground wires were routed from the CATV/Phone junction boxes.

All CATV/Phone junction boxes have separate ground wires and all lead to the main 6-8 awg main ground wire. I cleaned the main rod and the main ground wire on all sides with a wire wheel using a cordless drill and installed a new main rod clamp. 

N
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