Dedicated Line Noise Filter?


I don’t know if what I’m seeking exists, so I’m asking the experts.
I have 2 dedicated lines installed; one for analogue, one for digital. They originate at a sub-panel off the main circuit box. The sub-panel is connected by the hot lead and has it’s own ground including a second grounding rod. There is a home surge protector installed at the main circuit box.

I have passive conditioning on both lines for the components, yet I’m still hearing noise thru the speakers (from about two feet away). I live in a city and I suppose it could be dirty power from the grid.
Now to my question; is there a noise filter that can be installed at the site of the circuit panels? My electrician offered a surge protector with noise filtering (plus EMI/RFI), but was very expensive. So, is there a device that can be installed upstream to lower the noise floor?
Many thanks.
128x128lowrider57
lowrider57
The company that I use has about 20 electricians on staff. They come to the house to give a free estimate, then return about a week later to do the work. Perhaps they get the necessary permit before starting the job.
The permit is held by the property owner or occupant, not the contractor. When the work is complete, the project should be inspected in accordance with the permit, and an approval sticker affixed at the site. If you don’t have these permits and stickers, the work was not done in compliance with your local code: Code requires the permit and inspection.

Please don’t take my word for this - contact your city’s construction department for details. And while we're at it, please share the name of the electrician you've been using.
cleeds said:
That your contractor didn't know this - and didn't insist on applying for the required electrical construction permit - raises questions about his competency, and whether he's even licensed to perform this work.
I would be willing to bet, in most States electrical permits are not pulled for the limited type of electrical work lowrider57 had done in his home. Just because an electrical permit was not pulled, may not have been pulled, does not mean the electrician did not install his work and use the proper materials to meet NEC, state, county, and or city, electrical codes. 
jea48
I would be willing to bet, in most States electrical permits are not pulled for the limited type of electrical work lowrider57 had done in his home.
We have different definitions of "limited electrical work." the OP had " 2 dedicated lines installed ... They originate at a sub-panel off the main circuit box. The sub-panel is connected by the hot lead and has it’s own ground including a second grounding rod." My electrician would insist on a permit for this.

Just because an electrical permit was not pulled, may not have been pulled, does not mean the electrician did not install his work and use the proper materials to meet NEC, state, county, and or city, electrical codes.
That depends on the jurisdiction. Where I live, code requires a permit and inspection; licensed contractors can face substantial fines for failing to obtain a permit first. And the details about the OP's installation suggest that the work itself - because of the grounding - does not meet code.

Safety aside, I'll tell you why this matters. Where I live, when an offer is made to buy a property, closing attorneys routinely file under the state's open public records rules for copies of the property's construction permits. The attorney then gives copies of those permits to a construction expert - often a licensed sub-code official - who performs an inspection of the property on behalf of the buyer. If the inspector determines that work was done without proper permits and inspections, it's a huge red flag that can not only delay a sale, but require that permits and inspections be done after the fact. Was electrical work done behind Sheetrock that's now been sealed and painted? The electrical inspector can insist that the wall be cut open to reveal the work and prove that it was done in compliance with code.

There's simply no good reason to not file for the permit. I'd never use a contractor that would seek to avoid a permit and a proper inspection of his work. It's cheap insurance for the homeowner.
who performs an inspection of the property on behalf of the buyer. If the inspector determines that work was done without proper permits and inspections, it's a huge red flag that can not only delay a sale, but require that permits and inspections be done after the fact. Was electrical work done behind Sheetrock that's now been sealed and painted? The electrical inspector can insist that the wall be cut open to reveal the work and prove that it was done in compliance with code. 

This part is true in my city. The difference is that the inspector is hired by the buyer and his real estate agent.

As I stated earlier, I hope I'm wrong about how the subpanel was wired. I asked him at the end of the job, maybe I misunderstood. One thing I do remember is that he said new code requires 2 grounding rods.

The name of the company is Generation 3 aka GEN 3 in Philly. Started out as a son, father, grandfather business with very affordable rates. Not so anymore.
I will report back with my findings.