It is wil be way more useful to speak about the acoustics ASW/LV ratio instead of Pointyng vectors...
But we can buy cables not knowledge...
Cable matter more than objectivist think, less than subjectivist think, and their pricing is often but not always a theft ...
Cables thread are a plague most of the time because the group for which cable means "snake oil only" is offended by the group "who vouch for some costly one" ...
Balzac called it "La comédie humaine" ...
This thread is an exception though, making us focusing on the system price versus cables price ratio....
Common sense is the goal and the starting point here ...