If you ever call Denon support they always ask you if you're using a power conditioner and tell you that they don't recommend them. I still use one I'm not frying my system in the event of a storm and I do notice a difference also on my OLED
Smaller plug-in AC Purifiers -- Shunyata, iFi, Puron...something else? What do you like?
I like the Shunyata Venom Defender. It does a good job of reducing noise in my outlets.
I'm wondering if others have tried similar, plug in products — such as the Puron Power Filter or the iFi AC Purifier or something else.