@dancarlson10 , that is great that your QB-8 approach worked so well for you. I am really hoping that approach will work for me. AC line conditions and other variables (like how many houses are serviced by a public transformer) will vary from house to house and system to system, so what works best for you may not work for me. I’d say if I’m lucky I will arrive at your solution, since the QB8 will have the least coloration of the sound vs conditioners.
Nordost told me that you can’t even judge a particular conditioner’s effect or lack of effect on tonal balance as a generalization, because the effect on tonal balance, if any, is entirely system dependent. So what works for one person may not work for another, given all the variables.