Dedicated 20 Amp Line for Audio

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/

I’d rather read Chuckle's drivel than watch YouTube.

Both of those on the opposite rails to that of "noisier" items on the panel.

that's fine, but make sure your 20A audio lines are ON THE SAME 110V RAIL/LEG.

Also, I would not use 14/2 Romex or stranded wire.  You really need 10/2 Romex (Romex is always solid-core which is better than any armored stranded wire).  If you can't do 10/2, then 12/2 is acceptable. 

I don't know that you need a separate 20A line for each device like hilde45 recommends.  It's all about current draw.  You could probably run all source/digital components on one 20A circuit just fine.  The other 20A would go to amplifier only. 

That being said, I have six 20A circuits run to my room.  Each amp circuit only has one or two amps, but I'm totally overkill on my setup.  You can probably run two small/medium sized amps on one 20A circuit just fine.

Another option:

https://www.vhaudio.com/wire.html#bulkacwire

VH Audio sells cryogenic treated 10 awg romex wire.  It's a lot more expensive, but if you want the best that's the way to go. 

I am not currently running cryo-romex in my setup at this time (maybe in the future).