I had the electricians come in and install 20 amp breakers in my box for dedicated runs to the living room for my ridiculous hi-fi. plus hospital grade outlets. also. hardline network connections. fuck your Wi-Fi. moving in this weekend. everything is in boxes. i got some new gear for the rig for a housewarming present for myself. lol. more to come.
Try the fiber cable in between, it makes an galvanic isolation. I have fiber running just before my streamer setup and it makes quite the difference. Costed less then 100 bucks, very effective upgrade in my case.