Single plug dedicated circuit?

My opinion:

• Make sure your ground is in good working order.
• Run a sub panel from your main panel. This will give you big thick wires and minimal voltage drop due to load.
• Use a voltage regulator in your audio room. This will minimize the effects of the outside voltages swinging due to power company fluctuations as well as other household loads like the oven, AC, etc. and it will add some amount of inherent noise blocking due to inductance of the autoformer.
• Use RF/EMI blocking conditioners for all of your sources. Furman with LiFT/SMP or Zerosurge, all have excellent low frequency (relative) noise filtering.

I say this not just from listening, but from watching my home VAC swing no matter where I live.  By far the largest measurable improvements have come from the voltage regulator.

I think what gets me with the Audiophile/power discussion is that it wants to go everywhere all at once with no single principle to adhere to.

The ideal AC circuit:

• Does not waver in voltage
• Is free of noise
• Is a perfect 60 Hz signal

The problem is that the power coming in from the transformer and the demands of your home and the homes around you are noisy. OK, I get it. But the last thing you want is a wide-band perfect conductor. Ideally you want filters that remove as much noise as possible and some way to keep the voltage stable regardless of the load.

Well, you can’t have stable power because the incoming voltages are always fluctuating. A giant gauge wire will reduce the sag during musical playback but it can’t do a thing to change what he power company sends you.

RF pollution happening at the neutral ground bar(s), and if so, wouldn’t a whole separate meter and panel remove this factor?

Only if you believe there’s something that is injecting that in from your home AND that there’s somehow a magical RF filter that prevents it from getting back into your other panel. Where do you think that energy goes, and why does it not come right back in?

IMHO, you are better off using a surge protector like Furman wiht Lift/SMP or Zerosurge that have inherent filtering down below RF.

Now if you do believe there's some bad pool of RF energy in your neutral, then a great ground field is the way to minimize it.

I’m not sure what any of you think you gain by having an extra meter and panel.

The panels aren’t magical noise filters nor do they somehow improve the power delivery.

About the best you can do is run a sub panel from your main panel to your stereo room for the thick wiring, but that still leaves you vulnerable to noise and hash at the main or from the power line. The power line itself is not beauty of a noise-free source either.

I have a power regulator at my stereo, which switches every 5 V difference, keeping my VAC at my stereo between 116 and 122 VAC all the damn time. Even with everything off it is switching to keep the voltage right.  Would this be better running a thick wire all the way to outside? Only a little, in as much as the voltage drop caused by the stereo load would be minimized but there’s a lot of voltage variation at the transformer, and no amount of palladium plated, platinum core wire the size of my thigh is going to fix that.