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Dawkimi, here’s what I did for my 3000+ sqft house:200 amp service with power supplied by my own transformer just outside the service entrance.Whole-house surge protection and professionally designed and installed lightning suppression system. This includes numerous spikes on the roof and rods and plates buried around the house. Everything electrical is tied into this massive ground system. The result is a very quiet electrical environment. It also helps that I am in the middle of nowhere with no enviro ...
Why are you so sure of that? No doubt you are in a better situation than an urban dweller, but "quiet"? I wouldn't be so sure.If you already haven't, do try connecting an oscilloscope to your mains socket from which you draw power for your audio. Sweep from 60 Hz to 80 kHz - I think you'll be shocked at how "quiet" your environment is, but bear in mind, in urban areas, it's even worse. Often far worse.
FYI, I have looked at my AC power with an oscilloscope and it is dead quite. The only anomaly is some harmonic distortion, mostly second harmonic, but there is no "hair" or spikes.
The reason for 20A lines is that it implies heavier gauge wiring which means lower impedence.
This is the first time in my life to hear (read) somebody saying that. Consider yourself outstandingly lucky; I wish I could say the same.
...perhaps you should tackle the problem from the other side (assuming you are into DIY). This means buying a high quality, high input impedance power transformer. Can't fail, but is not cheap.
As I already have a 2KVA balanced power transformer, what problem will an additional transformer solve?
You could do the same trick by isolating the power amplification from the rest, because that's the prime source of pollution, being the greatest power consumer.
Perhaps I am one-in-a-million who doesn’t suffer from AC power problems and who’s components don’t generate or suffer from “kick-back pollution.” Perhaps the power problems you pretend to fix with your one-size-fits-all solution are not as common as you claim. Perhaps many audiophiles, who follow the preaching of audio forum gurus, are wasting their money buying solutions to problems that don’t exist. I am finished with this discussion. It is of no value to me and I doubt it has much value for others.