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

Mr. kosst_amojan

From where do you take this information about cable thickness and massive amount of impedance?

This site would suggests otherwise: https://chemandy.com/calculators/round-wire-impedance-calculator.htm

At material = Cooper, Fr. = 0.02MHz (20KHz), Length = 2m, Diameter = 20mm, Z = 0.00012 Ohms!

At 2mm, Z = 0.00143 (>10x worse or higher impedance).

The skin effect is about full power of a 0 AWG @ a Fr. of 250Hz @ 150Amp's. It doesn't need that kind of current at any Fr. Or power. A 1,000W power into 8 ohms would require 16 Amps.

Not to say, that in Audio most energy above 10KHz are harmonies, with substantial less power than the basic Fr. (-20dB less = x100 times less).

For some reason, those who tried it out were very happy with the results.

Sorry for the "0" on length. The new value is 0.00369 ohms and not 0.25 ohms as you say. Anyway, what about my Q:
"From where do you take this information about cable thickness and massive amount of impedance?"

Regarding Interconnects, it's another thread...

I use XLR, no Litz. The entire Pro industry use XLR, at length of 100 meters and longer, no loss! On 2m, it is perfect.

A short reminder: This thread is about speakers cables. 

No LAN cat 6, No balanced interconnects (XLR) or any other.

Until you answer my Q. don't expect to be answered.

With all the respect to Mr. Nelson Pass he went the wrong path. No one here approved his cable sounds better than other, but mine did.