There is one simple answer to this:
If you heard any difference between a standard 12AWG power cable and a $500 Audio-Woo-Woo cable, it was confirmation bias or just delusion.
It's such fun talking about this stuff with studio engineers. You know, the guys working in multimillion dollar studios, who record and master the music you buy. They laugh endlessly about the absurdity of audiophilia nonsense. But the exotic power cables gets the most laughs. You'll hear phases like "more money than sense" or "crazy deluded muppets".
Virtually everything the audiophilia community is obsessed with defies the laws of physics. Or is of such minuscule consequence that merely moving the speakers a few inches will negate any claimed effect.
If you want to spend some money, get an electrician to run you a nice clean 20amp power supply in Romex 10AWG solid from your fuse box to a set of six hospital grade power outlets. You can get the lot from Home Depot. Top it off with a decent breaker like an Eaton 20amp ACFI/GFCI and the. forget about the whole thing.