No one actually knows how to lculate what speaker cable they need

Mr. kijank

I didn’t defined what DF is. https://en.wikipedia.org/wiki/Damping_factor
"Only the resistive part of the loudspeaker impedance is used. The amplifier output impedance is also assumed to be totally resistive".
Loudspeaker impedance is given (when DF is kindly provided) for 8 ohms, and at a frequency of 1kHz. Just saying.
Speaker’s impedance is not just the coil. It has some RCL network in the crossover circuit, and mostly very poor wiring.
But that is a given. It sounds as you hear it on demo and buy it as a sealed box (black box).
Thats to cover your "lack of understanding of basic principles".
When analyzing such a circuitry, doing it with all 3:
Amp’s output, cables, speaker,
You get nowhere.
In electronics, DF, or output resistance is practically looking from the Amp’s output terminals into the Amp, and figure what is it’s output resistance. I extended it to include the speaker cables. This is my way to unlock the puzzle. You may go your way. However, none of you, including you, haven’t came with a say: what should your speaker cable be like?
I did.
For the sake f this endless arguing between me and those who sit on the bench and criticize, go give it a try and then lets talk. Till then, you better spend this precious time and energy, preying in the house of god. It will make you feel better and you will be pissing of one less guy.

Mr. dill

I've heard that there are people, that all there purpose in life, is to be a bad example. You fit quite well into that category.
Your place must be in politics. Audio is kind of small for you. 

Mr.  eichlerera

For DF=50 and length of 6 feet (2 m), you need a #16 AWG.

1. No need for speakers impedance. They are not in this game (speaker cable).
2. DF=5 is relatively low. It was common (40~) at Japanese amps and receivers of the 70's. 

Mr.  eichlerera

I'm sorry to kill your impression of skin effect on Audio frequencies.
The figure (at the AWG table) refers to full power at x frequency.
An other way to look at that, is that thin cables have low current capacity at DC, so it is close or identical to that in all Fr. Thick cables, that can conduct 10th or hundreds of Amps at DC, are a bit less of higher Fr.
But even so, if you look into Audio energy vs. Fr., the most power is at the lower Fr.: under 1 kHz. most of the stuff over 10 kHz are harmonics that are of very low energy. So skin effect is not for Audio, It mostly present at RF and very high frequencies, at high power (Radar etc'.).

As in any other cable. No particular significance of any type, at Audio freq. 
The only characteristics I found significant, is the cable resistance vs the Amp's DF. 
It works all the way up to the calculated value (improves sound) but do not improves above (thicker than calculated).

Hi
Google it up. I never thought it matters, after all, we use it, on daily bases, in every electric device on the planet. For some reason, audiophiles tend to think that it is special in their sound system. Well it’s the same. Many of those are life saving equipment, military, space, measurement devices, cellphones and more. None ever tend to go, where audiophiles go: BS land.

Sorry, I have no idea of what you are talking about. You must be mistaken me with someone else. 

Mr.  eichlerera
Sorry to disappoint you, but I don't have a theory of MY OWN, on electrons flow through the conductor. I learned it as all other from the very basics on conductivity. 
It served me well, on all circuitry I designed, built and tested. 

Can we please get back to the subject? Thanks.

Just saying, I've been vaccinated yesterday for COVID-19. Here in Israel,  vaccination is the fastest progressing in the world. Now in 30 days I'll be safe and immuned. 
So' I'm good with COVID-19, but still need to fight for my identity with you guys?
What a world...
Mr. Dill, did it ever accured to you that it worth giving my idea a try?

Mr. Dill

If so, why do yo keep being involved in those threads?
I challenge your say: It is just not practical to use large gauge wires in most installations.
For those it apply (high DF and medium to long cables) it will improve sound significantly. Not implementing it, will keep the sound muddy and poor.