My power situation is - messy. I’ve been working over the last six months to organize and also to clean up noise. I purchased an iFi Powerstation (actually 2) and have been very impressed. Much greater front to back soundstage, more air around instruments - I was actually shocked at the difference. I’ve also added a few more of their AC Purifiers. And I did not hear any dynamic restriction at all. Everything is plugged into one of them, except for the amp which goes straight to the wall with another AC Purifier in the second outlet of the duplex.
i’ve been working on upgrading power cords since then, but of course that is another story.
Of course different power issues will be very localized, but in my system, I was very happy with these units.