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

Geoff: Skepticism is absolute and invariable, so no possibility of it being "overly."

And what defines an expensive high end cable? What price point please? I just may have purchased one or two sets in the past and I need to make sure what side of the "end" I fall on.

The reason we don't see complaints from people who spent money on expensive high end cables is that they are too embarrased to admit that they wasted money on a wish, a prayer and gossamer.

Note that on 9/28 I provided my amps and speakers, as the OP requested, and the OP didn't provide a response let alone the optimum cable.

I call sham, fraud, hoax.

A real skeptic has curiosity and investigates and tries to get to the bottom of things. A real skeptic can sometimes change his mind, you know, based on experience or evidence. An overly skeptical person, on the other hand, ✋refuses to change his mind for any reason, even in the face of contradicting evidence. I.e., his mind 🧠 is closed on the subject. Capish? That’s where the P word comes from, you know, the word that’s been uh, outlawed. 

Mr.  han_n
The amp has no data on it's DF. I sent an e-mail to find that out.
I need that to do the calculation.
Regarding your bi-Wire, it is not a good idea. Bi amp and Bi wire: yes.
A single wire equal to the gauge of the bi wire combined, would do better than the bi wire. So this aproach is of no practical benefit. Did you say 4/0 AWG?
How much did they cost and who made them?