If it's just speaker cable you shouldn't have to worry about shielding. The size of the cable is the thing. I use the thickest cable I can for any long unpowered speaker runs. I'm sure there's a calculation but I just use the ridiculously thick stuff.
Twin core mains cable (6amp) and a couple of nice jacks will work fine!
Twin core mains cable (6amp) and a couple of nice jacks will work fine!
That used to be a recommendation for great sound in the HiFi world back when I was a kid. lots of magazines raved about the improvement in sound quality over other speaker cables. I used it for a long while. Me ears aren’t good enough to tell if there was anything different but it definitely worked fine and was a fraction of the cost of the french-pleated-1-million-strand-of-unicorn-hair-kryptonite-infused wire the shops were selling for more than the cost of a car 
