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

@badbruno 

Are you really interested in answering the questions posed in your starter post, or are you interested in your system sounding more like live music?

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. 😊