How can I measure the noise on my AC mains with a 2ch oscilloscope?

I'm definitely sold on the Audioquest Niagara solution at this point, but Shunyata, despite a very different design philosophy, also makes superb gear.  Just be sure that you deploy comparable power cables on your amplification components.  The conditioner is only part of the story.

Good luck.  Hope I was able to help even a little.

@cundare2 

yes your involvement was helpful and has given me new factors to consider while on this path. And good luck while enjoying your superb system !

it’s been a pleasure have the conversation 

cheers 

If only Edison had won the power war. We would have DC direct from the wall outlet. 😊

"Live Music" is full of phase anomalies, microphone differences, crowd murmurs and smells, bow rosin dust, insane sound technicians, a lack of sound technicians, balding head reflections, unseasoned wood flooring, drapery...all of which you can try to measure or simply sit there and listen to it. What a mess... 

No need to worry neurotically about noise on the AC line. Competent engineering takes care of that.

I wish this was the case, and it is obviously helpful for many components, but as many people remark about hearing system differences depending on time of day or what else in the house is running concurrently, then it is not a blanket "fact"