Recommendation for an audiophile speaker cord that is not "bright"?

 Tell me what the resistance change will be and how that relates to the ops speaker impedance in the mids to upper base.
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Interesting case this. Based on calculations a.k.a. theory nothing changes, stranded wires are claimed to be just as good as any singlecore.. But do a test and you might* hear what in audioterms is called a huge difference. 

One obvious reason is the ammount of intereference in stranded wires, but there will still be a difference even if all conductors were isolated & the interference is eliminated. I do not have all the answers here, just the knowledge after messing with this fome decades.

* depending on the test and your skills

What "interference" in stranded wires? Is it possible your tests were flawed and hence your conclusions not accurate? .... or your tests were very specific to the wires, speakers, etc you were using at the time?

You might have learned something here if you weren`t that arrogant. There is no way around this exept for trying & observing. 

"A cable is a source of potential trouble connecting two other sources of potential trouble"

Wilson’s generally like Transparent. As mentioned, it is what is used internally. I’m not sure how much it matters which ones particularly. Might be worth a call to either company. Power is definitely a consideration, I’ve kicked up my power lines with Cardas power and replaced my primary outlet and use Furman conditioning. I was VERY surprised at that change of these “tweaks”. I didn’t buy it at first, but power can make all the difference in low end delivery. Just more juice... another is placement. Have you played with that much? Moving them, even a little, can make a pretty remarkable difference.