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

b4icu,
for your info, presently I am using 2m Kharma KESL Speaker cable for both of them. Thanks 

Mr. khiak
Bi-wire is another urban legend, established in the 90’s. For a single cable at a X AWG is better than Bi-wire that the two, equals to the cross section or resistance of X AWG! This can be proved by simulation of the two circuits on "Spice". A cooper cable can conduct all audio frequencies at the same time. Some older TV designs, used wide band amplifiers, that would amplify two different frequency bande (IF and audio) to save.

As long as you are using your Telos 600, the wires need to be:
4 AWG@1.5m or
6 AWG@1.0m.

Can not find ant spec of your cables. Most are the Enigma...model. Also no Spec. 

b4icu,
I have been using this setup for the last 10 years and I am excited to hear a improvement for so little a cost. Thanks 

Mr.  khiak
You are welcome. All I'm asking in return, that you share with us your impressions from that exchange. Thanks.
How much did you pay for a set of 2m Kharma KESL Speaker cable?

I did find 5AWG high end bananas. I would like to try the 3/0 cables the OP suggested based on my 20 foot runs and gear. I may try 0 AWG. Problem is the cost to try is $400. I like the sound of stranded tinned copper wire sold by folks like Duelund, Supra, and Western Electric and always wondered if thicker gauge would sound even better based on my long lengths. There is a source for this as thick as 4/0 AWG. If the bananas were stackable I could split the thick conductor into two equal parts and terminate with stacked bananas or a combo of banana and spade. I have not found a high end 5 AWG spade connector however.

If if anyone finds a spade or banana of good quality, very important, that accepts 4 AWG or thicker let us know.

I am open minded to this and if the cost to try was lower I would do it. I would not use anything other than high purity, oxygen free, stranded tinned copper for this however. The strands need to fine. The connectors also need to be of high quality. As mentioned above, one can split the conductor into two equal parts and terminate with a combo of spade and banana connectors.

Here is a link for the 5 AWG banana connectors. Just scroll down to find them.

https://www.douglasconnection.com/searchquick-submit.sc?keywords=Bananas

Here is a link to the stranded and tinned bulk cable I would use. The maker offers all kinds of gauges. I think they were referred to in another post above. I do not know if the wire used sounds as good as
Duelund, WE, or Supra. The Duelund is cryo treated and that does make a positive sound quality difference. I know the OP has a different opinion. I have done comparisons and not sure if he has. My opinion is based on actual testing and listening. I suppose one could send out this wire to be cryo treated.

https://www.amazon.com/gp/product/B0156WDXSM/ref=ox_sc_act_title_1?smid=A1NLNJ4Y2QP8Z&psc=1


One last point.  To effectly reduce noise, especially over long runs, one really must twist the positive and negative runs.  Well twisting this thick cable will give you a very thick bundle! Just something to consider.