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

Have you ever wondered why components like this is avaiable? Do you have any experience with filtercomponents on this level? What kind of wiring would you use to connect it?  

https://www.banzaimusic.com/Mundorf-MCoil-N390-12mH.html

So pretty much you are ignoring that voice coil resistance and impedance is part of the circuit ....right, gotcha. So basically that 7awg number is made up.

And no, I don't wonder why components like that exist. They exist because people will buy them. Many will even convince themselves and others that a very small different in resistance is critical compared to large DC resistance and/or the large output impedance of the tube amplifiers they reference in the marketing blurb.

How "humble" of you .... advice without anything to back it up, is worth ....

On one side I know that most of you are to far out in the hifi-jungle to ever understand what you are into, but incase someone should be humble enough to try out my advices I`ll give them here for a while, some moore weeks mybe before I`ll give you up.

Quite an interesting discussion. A few things on my end:

1. My current speaker cables are labeled "Transparent high performance 10-2 10 AWG (upgradeable)." I was going to try some used Transparent REF RSC8 (MM2) ("high z", apparently designed for high impedance amplifiers), but the same dealer wants to charge me the full price for a tryout, so I decided against that option (it is not their fault, it is their business model);
2. I use the word "resolution" as in light microscopy. That is, the ability to discriminate 2 signals that are close together. So my objective is to increase the resolution of the system, but it may be that I need to change other components in the system as well. I try and change one variable at a time;
3. I do believe that changing speaker cables may represent the lowest priority in terms of audio reproduction;
4. My next step may be to using the lending library at the Cable Company.

Oldhevymec - the older McIntosh preamps are good - my colleagues are from the Ann Arbor branch of the University of Michigan, not MSU FWIW... 

I live in rural Michigan...I do miss 30 years ago on the web with the first USENET groups...thank you for all of the advice and am always eager for the feedback! - the old OP