I use a Welborne Labs, Gatekeeper. So much written (mostly negative) about this company but if you have one of their amps, power conditioners/surge protection, etc you know they are each quality pieces. I plug some fairly expensive gear into the Gatekeeper and it does the job. Prob find one used for a couple of hundo. Just my opinion...
Least expensive plug-in power conditioner that works
I am currently using a Shunyata Venom defender on my main system with good results. I’d like to put a similar device on the power to my Internet modem that’s in a separate room. I notice that there a lot more choices in this product category now. Does anyone have any recommendations that are cost effective and make a difference in performance?