Guys, I have seen what my ac looks like on a scope, and I have tried many, many devices that are intended to improve your power. The ultimate question is whether the device improves your sound. I worry that measures, such as that with the PS Audio Powerplant's meter, may only capture one aspect of the problems with your electrical service.
I had a Noise Sniffer and many of their active devices that you plugged into circuits that had high noise on them. In each instance when I plugged the device in the noise dropped. I did this until I exhausted the eight devices I had purchased. When I listened to my music, it was quieter and totally uninvolving. I began removing devices near my audio and found the sound improved with each I removed. I thought that surely those in remote locations would have only positive results, but I was wrong. I sold everything. What was the Noise Sniffer measuring, and why was removing it harmful to the life of the music?
I know fullwell that your experiences may differ from mine. I always advise people to let the new improvement settle in for a while and then remove it. If you lose the magic, reinstall it. If you regain the magic, sell the device. I have sold or tried to sell probably 40 such devices over a long career in audio.