I have heard and demoed all manor of Mains Blocks, Conditioners, Regenerators, Balanced Mains Transformers at all sorts of prices...including an Isotek Super Titan.
To my ears, they all changed the sound, mostly for the worse. The best was the Atlas Balanced Mains Transformer, which they have stopped making due to the price of Copper.
FWIW. I wouldn't dream of trying to "prove" that my results are real, as they were formulated using my humble auditory system.....though it's the same system that determines my taste in music, my appreciation of a good musician and chose the various elements of my Hifi (just like everyone else on here).