Replacing generic RECEPTACLES

have a dedicated line for my Krell FPB 600 amp and my ARC Ref 6 preamp which i will be adding the Furutech GTX-d r. But not for my Rega Isis cdp. Would you also recommend a dedicated line for the cdp too?

It would make sense to add a second 20 amp dedicated line. You can use your CDP, and in the future add another digital device such as a dac or streamer. It’s best to isolate analogue from digital.

Or you can keep the 15A line as long as it is properly grounded at the receptacle and at the circuit panel.

The 2 double receptacles on your 20 amp line equals one 20A dedicated line.
It's fine to run an amp plus preamp on the same line; the 2 components will draw less than 20 amps. It would not be a good idea to run monoblocks on the same AC line due to the high current draw.

czarivey, Did you buy a used home? Or move into a preexisting apartment? I guarantee the duplex outlets there are all old as the building is. No normal person replaces any duplex until they are broken. that usually means the duplex outlets when YOU move in, are already 10 to 40 years old.   When I move into a new apartment, I replace all the outlets with new ones right off. Ditto the light switches.(since I stay more than ten years.. it just makes sense to me.)So generally replacing outlets is more like replacing nearly broken down crap that works, but does so poorly, with something that will work well for years to come.++++++++++++++++++++++++++++++++++++++++++++++++++++TTman.. As for the quad 20 amp circuit. That is all you need, usually. Unless you like to play music at over 100dB (which is really loud)In that case it will not matter anyway, since you will soon be deaf. and the distortion in your ears will mask any in the equipment.
So I am saying you do not need a separate circuit for your CDP, or preamp, or any other equipment.  If you want some improvement, I would suggest getting a small powerline conditioner for your CDP, plugged into the same circuit as the amp.

I have all Shunyata power cords and replaced my audio outlets (on dedicated lines) with the Shunyata 

elizabeth

... 20 amp duplex on 15 amp wires NEC says no. The NEC is not the wire police. They are guides used by electricians as to what they can and cannot do since they are contractors and THEY have legal and liability concerns ... Those concerns are not a law, You cannot go to jail for using a 20 amp duplex on a 15 amp line!

o, you will not go to jail. But in the US, almost all jurisdictions rely primarily on the NEC, so it will be a violation of local code to put a 20A receptacle on a 15A line. That's because the breaker would not reliably trip if the load exceeded 15A. The breaker's primary purpose is to prevent the wire in the wall from overheating.