Dedicated 20 Amp Line for Audio

The advice I followed was to do multiple lines, but to make them with the same length of wire.

I have the following:

1 line for amps

1 line for preamps, with the same length of wire

1 line for digital components

I also ran 1 for subwoofers and 1 spare.

10 awg. 20 amps.

Run the 20A line from your breaker to non ferromagnetic outlets such as from Shunyata Research and others. Then use high end power cables to good power conditioning units or regenerators of your choice. I use PS Audio PowerPlants. Then run good cables from the PowerPlants or power conditioners (eg AQ Niagaras) to your components. Extra credit for using a Synergistic Research Ground Block of some type and ground leads. Lastly, I use a dozen or wo GreenWave RFI/EMI line filter units plugged into open outlets in my listening room and around the house to reduce the overall EMI and RFI in my home. This is easy to measure with a simple digital and audio meter. 

Fremer is okay. But Fremer on video is time wasting. Even when cued up to say exactly what is relevant thereby wasting zero time. fuzzball, your MDS is showing.

@high-amp,

IMHO, I would run a 10/AWG BX/MC cable with solid copper core conductors from the breaker panel to a metal receptacle box. The metal sheathing on the BX/MC cable absorbs the (EF)) electric fields emitted by the wires and shunts it to ground. Now from panel to plug is shielded. The upside is low line noise and reduced antenna effect on AC power lines/branch circuits.
Downside BX/MC cable is pricier. I would run at least two dedicated 20 amp lines for audio. I have four in my audio rig. All four dedicated audio circuits are 250 volts 20 amps. With no noise or ground loops. Also, all four dedicated audio circuits are at the top of the breaker panel numbers 1-8. See the links below. Hope that helps. Mike                                                                                                                        https://healthybuildingscience.com/2013/01/15/residential-wiring-best/#:
 R

 https://www.msbtechnology.com/faq/house-power/