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

keppertup  said: "Ebay is selling 25 feet of 0 AWG copper wire for $23.  I will buy it, install it and report back. " 

At that price, you can be sure it is copper clad aluminum wire.

I purchase solid core (currently AQ biwire works for me) and plug it in...I then listen to music and completely forget about it (the wire, not the music). I am very careful about it being long enough to reach the furthest speaker...hey...I'm a perfectionist.

b4icu
Mr. geoffkait
You bett right.
On cryogenics or burn inI answered already.
Directionality: Audio is an AC. That means that every 1/2 wave is flowing in the opposite direction of the other 1/2.
Please be kind to explain, who is changing the cables directionality so many times a second...?

>>>Easy question. The reason wire direction matters in an AC circuit is because the signal that is traveling in the “opposite direction” doesn’t matter in terms of what you hear from your speakers. You only hear the signal that is traveling toward the speakers. So you can forget about the 1/2 wave traveling in the opposite direction. That’s why you want the best direction of the wire in the cable or fuse or power cord aiming toward the speakers. That’s precisely why the new Audioquest power cords are “controlled for directionality.” I.e., each tiny strand in the power cord is controlled for directionality.  It’s because direction of wire matters in an AC circuit. Get with the program.

Dill,

You are correct, $23 buys clad aluminum.  Thanks for educating me.

I will order pure copper for $69.

Gratefully yours

Mr. geoffkait

Your say about hearing only the 1/2 wave in AC is not supported by anyone. It is absolutely incorrect.
The only way doing that, is by placing a diode on the line. That will eliminate any current the opposite direction.
If that is done, you will really get only 1/2 the wave, 1/2 the voltage and also 1/2 the power. For sound, you will get 50% distortion.

Showing now the FR swipe on a Spectrum Analyzer, would present a whole different thing than without that diode.
Even the speakers motion, is on both directions (pushing out or pulling in) must be done by a signal (Amp. forced) and not like a door with a spring that close automatically. 

Sorry, if you are an Audioquest sales guy. 
As for power cords, please leave it out. We are talking about speaker cables on this chat. 

None of the above, is on the subject, of how to fit (calculate) the right cable for your system. Unfortunately, Audioquest can't tell you that.