Soeaker cables technologic dilema…

Well first you said.

"We have two technological solutions when it comes to speaker cable"

Then @cleeds said.

"A shielded speaker cable? I've never seen such a thing in a home installation. To what would the shield be grounded?"

Seems reasonable to me.  So, I'll add that any kind of shielding increases capacitance and reduces inductance. Then there are these by In- Akustik where they engineer their cable to use air as the electrolytic and avoid the capacitance that's created when insulated conductors are twisted together or braided as in some speaker wire configurations. You could argue that lower inductance is a good thing and capacitance doesn't matter anyway. 

@mitch2, @milimetr I appreciate your thoughtful responses to my post.  I currently use a 30-foot pair of Kimber Kable 12TC which recently replaced a 30-foot pair of 8PR that I purchased in 2009.  The 8PR had a total capacitance of 2547pf for each 30-foot run whereas the 12TC's is around 4400pf.  In either case I've not experienced a situation where these values have had any meaningful impact on the sound quality or the electrical performance of any amp, I connected with them. Including low power single ended tube or tube AB and certainly not any AB solid state amp I've used regardless of power rating. I can attest I've played around with lots of them since 2009.

@squared80 Well, there's no equipment listed in your profile so I guess we can only assume you speak from experience.

"Solutions? Solutions to what? Increasing margins for snake oil companies? This cable won't be any better than a coat hanger. I guarantee you would never know the difference in a blind test."

 

The result of twisting or braiding and shielding insulated conductors reduces inductance and increases capacitance.