New electrical wiring specifications

My next project is to run a new circuit to my music room.  I have 12/2 now and am going to move the receptacle to a better location and change to 10/2.  I watched a video with Michael Fremer a few years ago and he said all his equipment was on one circuit and that was recommended.  I don't know what the right answer is nor if amps should go into the power conditioner or directly into the wall.  Suppose the only way to know if try and compare.  

Standard 20A circuits with 12/2 wiring.

Wow a lot of you guys are way out of control. Especially the multi ground rod people you’re only supposed to have one ground rod per meter. I keep hearing the song from the Talking Heads in the background about burning down the house

20amp wire and any of the highend outlets. Thay are all good.  I use Cardas. But allmof them are very good.

Especially the multi ground rod people you’re only supposed to have one ground rod per meter.

@raysmtb1 

Actually that’s not true. Code allows multiple supplementary rods as long as they’re connected to the main rod which is itself bonded to the panel. Rod-to-rod connections are prescribed by code.

What you cannot have is a ground rod that is not bonded to the panel. For instance, running a dedicated 20A circuit to one’s listening room, and that circuit’s ground is not returning to the panel; instead, it is connected to its own ground rod. That is expressly forbidden, not to mention it’s absolute sheer idiocy.

That Talking Heads song, 😂🤣