Power Conditioners

Whole panel supressors SHOULD be used, but get a series mode protector near your delicate gear. Please note the activation voltage of whole house surge suppressors is often quite high, ~ 300V, and take a while to activate. I installed one in a Square D panel and the instructions clearly recommended additional protection at your gear. I’ve read from a single source that lightning strikes can induce a surge in the wiring itself, it doesn’t have to come down the line, so that’s another reason to have a suppressor near the gear.

Further thoughts here:

https://inatinear.blogspot.com/2019/04/power-management-for-frugal-audiophiles.html

Can anyone explain the differences between the SR Powercell 8 UEF SE and the PS Audio Stellar Regens? 

First of all...

the effect of filters and power-conditioners strongly depends on
your "current" situation at home.

I moved several times to different areas and the effect never
was the same.

So I would recommend to make tests at home with loaned
equipment.

My recommendation is the NuPrime Pure AC-4.

https://nuprimeaudio.com/product/pure-ac4/?v=b0c4bc877c29

I never had such positive cleaning effects for less than 5000 bucks.

I live in Florida, Miami actually, and would not even have any of my three systems not on high quality surge protectors ever again.  Lost two high end subs to power spikes before I fitted the 2 video systems up.  Audio system used to be on voltage regulating transformers which also blew on a spike and is on surge protection now.

Being an electronics technician,  my recommendation would be the Furman,  will get the RF. but will quit if hit hard by a large spike. and an isolation transformer with voltage hold circuits to keep voltage steady, filter spikes, low voltage, RF, high voltage.  That is what I did.  Tripplight makes a reasonable one for a few hundred dollars that is much cheaper cost than esoteric over priced millionaire conditioners. They work fine.   My setup is dead quiet full volume.