Why high-end cable manufacturers don't post measurements?

Rubbish

"In an audio system, the damping factor gives the ratio of the rated impedance of the loudspeaker to the source impedance. Only the resistive part of the loudspeaker impedance is used. The amplifier output impedance is also assumed to be totally resistive." https://en.wikipedia.org/wiki/Damping_factor

Neither the amplifier nor the speaker have constant A/C impedance

Mr. ieales

You claim that the Audio industry and Audio Testing (Audio Precision) as well as Wikipedia, are all Rubbish.
You know better?

For the sake of this endless argument, what is your explanation to the difference in sound with different speaker cables?
Do you have one?

It is easy to criticize. But what is your theory? What do you have to bring to this discussion table?
Except that you disagree with the entire Audio Industry, testein and  Wikipedia ?

For the sake of this endless argument, what is your explanation to the difference in sound with different speaker cables?
Do you have one?

http://www.ielogical.com/Audio/CableSnakeOil.php

For the sake of this endless argument, what is your explanation to the difference in sound with different speaker cables

For example Take a stranded copper cable of 0awg and one of 12awg running 10 feet connected to any amp with a DF >300 and a nominal 8 Ohm speaker and there is no difference in sound. 

For the sake of this endless argument, what is your explanation to the difference in sound with different speaker cables?
Do you have one?

http://www.ielogical.com/Audio/CableSnakeOil.php
I read it (skimmed some) but Overall, I agree. At least in the attempt and direction.

The big however, in the equation of attempting to be the public protector, is that..in the given complex equation..x, y, and z will forever remain unknowns, as long as humans exist in the realm of possessing differential, or possessing individuality. The self appointed job would be eternal, and unending.

If there was exactly one DUT in all of eternity then all of it could be cut into stone and marked for the ages.

Alas...
the number, the sheer number of possible equipment differences, vs the number of possible human differences, vs the number of possible combinations of such... makes for an equation that has possible differences in each individual case, that probably exceeds the suspected number of atoms in the known universe.

So, without the humanities involved, the engineering end of the pool, simply cannot achieve balance in any way...and finds itself floundering in a unsolvable morass of all.