objective proof does not have to have hard numbers, though it can, but critically it must isolate what is being tested,
My experience with my electrical treated grid, in my house, with my electronic components, with my cd and files, the well known one i love the best, how can we reproduce that in an another location?
You cannot isolate these encompassing elements all linked in one audio systen, MINE....
This Evidence is easily accessible to experience in your own house for yourself to repeat with your rightfully treated audio system.... Objective proof with a volontary crowd of guinea pigs and a repeatable experiment not so, especially in a non treated electrical grid, and with a non treated room , and with non controlled resonant system....They are many factors implicated dont you see?
But your goal is it to make an experience for yourself? or debunk audiophile claim of differences?