Which components to isolate

Gold is third best conductor after silver and copper. gold is used for connections where oxidation is problematic.
http://www.rare-earth-magnets.com/t-conductors-and-insulators.aspx

Russe

Yes you are ok with the silver cupper and gold in his order. Thank you.

Isolate any Video from Audio.

"I have three dedicated duplexes and want to minimize distortions put back into the system."

I'm assuming that by "three dedicated duplexes" you mean each of them is on it's own branch circuit from the main panel, each protected by it's own breaker. If so, I would recommend they all be on the same phase.

Generally, residential power comes into the house on 3 wires, hot1-neutral-hot2 (H1-N-H2)

H1 to N = 110 vac
H2 to N = 110 vac
H1 to H2 = 220 vac

Inside your main panel and after the main breaker are two buss bars (H1 and H2) that have tabs on them for the breakers to plug on to. The breakers are grouped on a left side and right side. Every other breaker going from top to bottom on either side alternates phase.
Looking at the left side from top to bottom
1-H1
2-H2
3-H1
4-H2
5-H1
6-H2

This arrangement allows a 220 breaker, which is simply two 110 breakers slapped together and controlled by one paddle switch to occupy adjacent slots on either side of the panel. H1-H2 = 220V

So if your three dedicated duplexes are on three separate breakers, I would recommend that each breaker be on the same phase of power, or every other breaker from top to bottom (1-3-5).

Regardless of whether the 3 duplexes are coming from 3 separate branch circuits or are 3 duplexes parallel from a single branch circuit, I would ideally suggest individual surge suppression/filtration for each outlet to protect each component from any spurious surges (pops) that may occur either from switching on the turntable motor or the bathroom fan. Noise can come from within the system as well as externally.

As recommended above, I would group components based on current draw, keeping the most sensitive components (preamps) away from the most current disturbing components (power amplifiers).

Personally, I would run one dedicated branch circuit using 10G or 12G conductors to a single duplex outlet. Into that outlet I would plug in a power conditioner that has each outlet individually suppressed and filtered. I would do this to minimize the potential for developing ground loop hum.

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