Nope. Not even. Worse than a waste of time, whatever you get from a noise meter (extremely questionable to begin with) becomes totally worthless when you realize a lot of the noise comes from where the wire is- and you're not testing it where its going to be!
My system https://systems.audiogon.com/systems/8367 has been in this room nearly 30 years now. In that time its been run on a normal circuit, a direct (dedicated) circuit of 4ga wire, a direct circuit of cryogenically treated 4ga wire (yeah, I pulled the wire out and had it cryo'd!) and that's just the 120V history.
Then I got a step down transformer and so now its cryo'd 4ga 240V to the transformer. The wire since then hasn't changed but there's been a ton of improvements, the whole panel and wire being treated with TC and some other stuff.
Each of these steps was an improvement but the biggest most cost-effective one was the first, going direct, eliminating the daisy-chain of outlets. For what you are talking about its probably worth running one dedicated line. Make sure it goes close to your system, use a Synergistic Blue or Orange outlet, and call it good.
By the way: use your ears not a meter. Every time.
My system https://systems.audiogon.com/systems/8367 has been in this room nearly 30 years now. In that time its been run on a normal circuit, a direct (dedicated) circuit of 4ga wire, a direct circuit of cryogenically treated 4ga wire (yeah, I pulled the wire out and had it cryo'd!) and that's just the 120V history.
Then I got a step down transformer and so now its cryo'd 4ga 240V to the transformer. The wire since then hasn't changed but there's been a ton of improvements, the whole panel and wire being treated with TC and some other stuff.
Each of these steps was an improvement but the biggest most cost-effective one was the first, going direct, eliminating the daisy-chain of outlets. For what you are talking about its probably worth running one dedicated line. Make sure it goes close to your system, use a Synergistic Blue or Orange outlet, and call it good.
By the way: use your ears not a meter. Every time.