Dedicated 20 Amp Line for Audio

No RFI I’m lines here MC. You need a reality check.

And lose the uncalled for YouTube crapola.

oldhvymec. Nothing but the truth. And try to keep stuff with random motors (refig. etc .) on the other rail.

Fremer is OK

Video on an audio forum is insulting and generally time wasting.
Wow!!
I do not doubt that you WILL go lower. Keep diggin'.

I should clarify - no RFI emanating from any wall lines around here.

high-amp:

Go with at least 12/3 otherwise maybe not worth the bother. One 12/3 should be sufficient.  Armored or conduit is necessary to shield from RFI.

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