Best place to live for good quality power

@sgreg1 Fancy modern battery power supply (like "Jackery") has regulators and complicated circuit that keeps that from happening. Because they are designed to power digital circuits, the power must be tightly regulated. But the true affect on audio is known only to the users. (I dont have one)

Interesting responses.

Seems physical infrastructure is most important. A rural location with rusty spider-web equipment that technicians have put decades of bandaid solutions on which will catch the forest on fire probably sound worse than a dense city with a new supply. Or maybe finding just the right location in the world with vintage power company gear gives you the right sound lol. possibly.

I live a few blocks from a substation in a major city. I guess it's excellent because on these heatwaves, the system turns into a $100 clock-radio. When the heatwave subsides, the 3D psychedelic rainbow returns. I can't imagine if I was stuck with that bad power ugh. 

@itsjustme 

But this is exactly my question. Some people said living away from noise-polluting sources does not guarantee a good sound - such as rural areas with terrible physical infrastructure. So I assumed majority was noise-related, but may not be true. If the power from the source is very poor, thats a problem.