Best place to live for good quality power

Antartica with refined solar battery system is any audiophile dream...not much RFI or EMI as in civilization or as in savage urban environment ...Out of blizzard day the noise level may be very low... Visitors are rare...

Bill Gates put his stereo system there...

I plan to do it very far from him...😁

The vibration is  the main  problem because of the shifting ice plates under you...You must pick the right spot... Far from noisy pinguins...

Acoustic embedding are the same problem as anywhere else...

😁😊

But joking apart, i live in a small city with well managed electrical grid...my ONE single plug wall used only for my amplifier near the main central panel is very good... more improvement are always possible... But sometimes costs and work needed do not really compensate for the slight increase in S. Q. .. I am lucky...

«Penguins prefer their music underwater and me too in my bathtub »-- Groucho Marx 🤓

According to my PS-Audio Power Plant, my incoming AC at my audio system (Portland, OR) is typically119.5-119.7 VAC with 2.2% to 2.3% THD. 

@jaytor Thanks for sharing your data.    I too have a PS Audio power plant and enjoy the built in oscilloscope.  I've checked my data occasionally over several years and it is always around 4.2% THD.  voltage can vary from 114 to 123.  I set the output to 119.5 and get .1% thd.   Here is a link to the chopped sine waves of my input (same as I posted above).  

https://photos.app.goo.gl/5scsFGHBRjE8ewti9

California electrical grid is not the best managed.  Of course, except for audiophile equipment, nobody really cares.  Your hair dryer or stove will not notice the difference.

Jerry

@carlsbad2 - I live less than 1/2 mi from our electrical substation which may help explain the more consistent voltage and lower THD. I don't think there are any manufacturing operations (which tend to operate large motors) very close to me. I don't think I've ever seen the voltage less than 119 or more than 120.5, so it stays pretty consistent. 

I also have solar panels with an inverter connected to the grid. Not sure if that helps or hurts. 

I have my power plant set for minimum THD, so my output voltage is a touch higher at 121V, but also with 0.1% THD (this is probably the lowest it will report). 

Not much difference here with or without the Power Plant.