Extracted from a thread “Cable Burn-In - Myth or Fact?” at Audio Science Review that Hagerman started about this equipment:
“What are the physics behind burn-in? I don't actually know, never been able to figure it out. I have some ideas, but not the chops to dig deep enough into the underlying mechanics to prove anything.”
To summarize, the engineer is basing his concept for the effectiveness of his “cable burn-in’ers” on his customer feedback. Customer feedback is not a suitable sole means of validation for design efficacy, which has been understood to the point of our planet having legal infrastructure against it for decades in other industries.
IOW, there is literally no scientific process or evidence whatsoever to support what these devices allegedly do. Please understand, this is not advocacy for the pseudoscientific stance of “no measurements = no difference” - I do not think this way nor do I agree with the stance that “if it cannot presently be measured then it cannot exist.” Absence of evidence is not evidence of absence. In this case, the issue is both the engineer and consumer appear to not understand, or not acknowledge, what constitutes evidence.
Engineering must be based on the scientific method, and in these products, science is being disregarded. At least the designer is somewhat up front about it. I admire someone who publishes his schematics in this day of nearly unchecked IP theft. However, in the case of this particular “IP,” I’m not sure how much there is to protect.
Link to the whole aforementioned thread for any user / would-be user of this product: