are there any measurable differences between a burned in cable and a non burned in cable
Glad you asked. Honestly, I never even checked. Mostly I think the answer would be no, the obvious stuff doesn't change appreciably. However, if you dig deep, it might be that dissipation factor of the dielectric, or some kind of hysteresis like remanance could be measurable. DF would be high on my checklist. But you have to start with the basics, like LCGR. Inductance, capacitance, conductance, and resistance. These are the 4 basic parameters used to describe a transmission line. Then go on to relative permittivity and permeability, which are frequency dependent (hence, the reason we use teflon and other exotic materials for circuit boards operating above 10GHz). I would also look into parasitics and contaminations, like residual diode-like junctions between materials (cuprous oxide is a semiconductor) or photovoltaic or electrochemical processes taking place. We could have tiny little batteries or thermocouples added into the mix. There is more than enough stuff to look into.
So maybe a $40k network analyzer might be able to start pulling apart some of this. I have no doubt that pieces to this puzzle will start to emerge in the next decade. Progress takes time. It is both nonlinear and lumpy. Digital audio took us awhile, too.
A lot of the advancement in hi-end comes from lunatic fringe experimenters. Seriously, who else would cryo a tube? Or bias a cable with blue light? But hey, it is the results that count, not the theory. We can figure that out later. And so that is where I am with the FRYKLEANER. It works like magic, we just don't know why. For me, the best piece of evidence so far is my 30-day money back guarantee (and no restocking fee bs, either). No FRYKLEANER has
ever been returned.
The proof is in the pudding, and we have achieved the first step, empirical evidence though A/B testing. Step two is a solid scientific theory based on known physical principles. Step three is the experimental proof of step two. We're just getting started.
Having said that, you'll notice the FRYKLEANERs are really well engineered circuits using regular low-cost components.

jh