Don’t waste your time and money on measuring noise on your audio circuits. They are all noisy to a certain extent. If you want to make sure you have the least noise on your audio electrical circuits, just hire a qualified electrician and install dedicated circuits and audiophile grade AC outlets (Furutech).
You should wire 2-3 dedicated 20 A circuits, depending on your system configuration. I have 3 dedicated circuits, one for each of my monobloc amps and another circuit for my source components. On the source circuit, I also added a Shunyata VRay II power conditionner.
For my own information, I purchased a used Entech AC line analyser meter. Measured the dedicated AC line noise on my dedicated and non-dedicated AC lines. The dedicated lines had 98% less noise than the non-dedicaged lines...
You should wire 2-3 dedicated 20 A circuits, depending on your system configuration. I have 3 dedicated circuits, one for each of my monobloc amps and another circuit for my source components. On the source circuit, I also added a Shunyata VRay II power conditionner.
For my own information, I purchased a used Entech AC line analyser meter. Measured the dedicated AC line noise on my dedicated and non-dedicated AC lines. The dedicated lines had 98% less noise than the non-dedicaged lines...