Dedicated 20 Amp Line for Audio

The vast majority of home circuits are run in a daisy chain from one outlet to the next. Every connection introduces micro-arcing and noise. All the current running to the last component had to go through all those connections. Also every wire is an antenna and brings RFI into the line. So even if your system is the first outlet merely by running to the others introduces more RFI.

The main reason for a dedicated line is to remove all these sources of noise. The difference is big and easy to hear. This noise is present on all AC lines, just much less without all those extra connections. It is not just for the amp, every component benefits. Running more than one line is unnecessary and may even be worse, in that it runs the risk of introducing noise in the form of ground plane differentials. 

It's fine to run more than one dedicated circuit. Run them on the same rail at the main. If you run a pair of 20s run BOTH on L1 or L2 don't distribute the load between the two. That is a good way to pick up noise.

To tell the truth these days with class D amps and high effeciency speakers a single 15 or a pair of 15s will work without a hitch.. Same rail, separate breakers.

Regards

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.

I would run at least two dedicated 20 amp lines for audio. IMO, amps should be on their own dedicated 10 gauge ac line, nothing else on that line.

So now Michael Fremer is crapola. Wow. A new low.