I used to, in my CRT projection days..I used to transmit the HD video in analog. Hardwired inside the Projector, and hardwired into the video card.
video card modded, entire CRT projector modded, and so on.
I used mini RG-62 as cables.
I custom tweaked the impedance of each, by hand, using my eye, with variable caps and variable resistors.
I did this at each end of each cable, painstakingly, and slowly wound it down to the best pairing of end terminations for each cable. Took a month or more. Brutal work.
People thought I was nuts, but the system was so tweaked, that this effort, the effect of it...was readily visible. It made it get that much closer to perfection. I took quite the beatings for all those experiments and results, over at AVSforum.
It just goes to show that a thing can be very real, and it's reality can simply be in the observing and noting of it. That it does not need to be verified via measurement before it is allowed to exist.
That the ears are the most complex system of sensory input in the human body. More neural horsepower is dedicated to hearing than nay other sense. That the senses do not need to be of a visual nature in order for the given sense to verify. Hearing can be believing too, as it is a case of even more neural input than any other sense.
I trust my ears to about as much as I trust my capacity for rumination and deduction. That some of us self trust, hear better and ruminate a bit more objectively than others might. Even though it may be delegated as being entirely subjective due to no measurements being applied. Many of us are like this. And many are not. Thus the arguments are born.
It is good that you have measured it, and please whack a few linear-minded moles for me, they need it.