I use two core wire of the heaviest guage audio kind.
Before that i used shielded with also thickest grade and the very rigid kind(hard to get), not the flexible(they gave alot of problems). But the two cores kind sound a bit better IMO.
Ive never had microphonic issues with those two kinds of wires, i seem to have that only with the flexible guitar cables. Probably i should not step on my guitar cables as often........
I also have high grade audio jacks, gold plated tip.