Ever use a non-contact circuit tester?
They function because an electromagnetic field is formed around circuitry/a conductor, when a voltage potential is applied, whether an actual circuit is completed, or not.
"I actually want to learn more about the dielectric bias system*.
Review the first paragraphs, of my first post to this thread, for my understanding/postulations, on how *such might work (according to modern electrical theory).
As to whether the MPC wallwarts/system, such as attached to my Main amps' interconnects and power purifier's PC, would make a profound improvement to your listening experience/ears; you're welcome to stop over, if ever in the Indianapolis area.
They're among the easiest things to A/B test on the planet.