Quad panel outlet - can I do one circuit on this?

@jumia below is another thread in which I believe JEA talks about how he suggests running Romex. And deviating from his advice may have an effect on the sonic result of multiple circuits. You did mention how gear might have an effect on what I heard when doing 3 vs 1 experiments, and maybe it would, I don’t know. I am running a Cary SLP-05 in front of a Cary V12, in front of a pair of B&W 805s supplemented with an old M&K powered sub, interconnects by Kimber Silver Streak and biwired (I think, but it was a long time ago) Kimber 6TC and 8TC.

So no digital stuff mixing in it appears. And certainly not a TV set. So it's somewhat pure.

So no digital stuff mixing in it appears. And certainly not a TV set. So it's somewhat pure.

That seems to be the main argument for having multiple dedicated circuits.  In the first thread I pasted, MC doesn't subscribe to that logic.  In the second thread, Eric Squires suggests one circuit but with a device to isolate digital.  (I haven't done that yet.)  I had thought that having separate circuits would better isolate them, their power draw, from one another.  Again, MC refers back to what they all share in common--the neutral/ground bar at the panel.

I don't have a good enough grasp of electricity to understand the theory involved, but I do feel I recognized an incremental improvement when I put all four of my components on one duplex. 

Can I do a 20 amp dedicated circuit to four outlets in a quad panel on the wall?

. . . oh, but the answer to this would be ’yes.’ You could use a strip, a power conditioner, or you could connect your two duplexes (which were on the same 20A circuit) with Romex.

(And I see no reason that one 20A circuit shouldn't be able to handle all your gear.)

It's not about availability of power to meet all the needs of the audio gear, which is generally not very much.

I had 2 600 W mono blocks, a 5 channel amplifier, tv, AV processor, preamp, Power conditioner, a few lights, modem, router, weather station and a couple network switches all living off of a 15 amp circuit with lots of room to spare I believe. Sounds good.  Then I added 2 dedicated circuits with 10 gauge wire for all the audio gear and it has been noticeable in a very favorable way.

It's about the clarity and isolation of the electricity and making sure less restricted Power availability is always there which is enhanced with a higher gauge electrical wire.