Originally Posted by bluewizard
One has to ask - What magic can a Power Cord bring that is not offset by yards and yards of common unshielded wire in the walls leading back the Fuse Box, and that can over ride Miles and Miles of wire out at the Power Pole?
If that works, it is absolutely 3 feet of PURE MAGIC.
While this is not a cheap option, it is recommended. The less you have on the Circuit the less there is to interfere and the less to compete for available Current. Were I a Rich Man, I would run Dedicated 20 Amp Circuits to be used exclusively by my Audio Equipment. But that is an expense that is far beyond what most people can justify.
But if you have barrels of cash laying around, it is not out of the question.
As mentioned, I would run one (at least) Dedicated Line unbroken with NO Splices to Commercial or Hospital Grade Outlets.
Just some additional thoughts.
Regarding to power cord, there's so little % that is under our control, like you said, where does it end? Even if you make the shielded cord to the breaker box, how about the noise from the street. Even if you shield all the way to the street transformer, how about the power line? It goes on and on. A little power cord is not going to help. That's why I specified I am NOT suggesting people to run a dedicated line from the breaker box, that's only cover the part under my control not to throw anything onto the line.
Also, this is all relative. I am sure if one's system approach perfection, one might find the power line become the bottle neck. OP said his budget is $3500, it's a GOOD system, BUT it's no way even comes close to "perfection". Even if the system worth $20,000, it's likely the power cord still not the bottle neck. But if I were to have a system that worth $100K+, YOU BET I AM GOING TO LOOK AT THE POWER LINE...................Still not the power cord though as it's so small a piece in the power line picture.
Now again, I AM NOT SUGGESTING THIS AT ALL, JUST TALK ONLY
. If I have a $100K+ system, it is going to approach perfection. I know I cannot depend on the street power line. My option that I would consider are:
1) Spending a few thousands for a power conditioner suggested by someone here before, that is a AC to AC converter that gives a noise free 60Hz constant voltage output no matter how noisy the AC input is and how much fluctuation the input is.
2) More practical is put up solar panel that has option to store power into the battery and power the dedicated line for the system. It's a lot of money, BUT it can be for emergency power for the house if the power company fails due to some disasters. So you have total control of the power line for the system.
BUT AGAIN, this is crazy idea and ABSOLUTELY NOT PRACTICAL
. Just I don't have anything better to do in the stay at home lock down situation. I am building my 4th new amps in the last 3 months. I have power amps coming out of my ears now!!! It's to the point talking BS become not such a bad idea.