@m-db To support @david_ten ’s suggestion, I use the Netgear Orbi mesh router and satellite system, and it is very good. Much faster internet on top of helping your digital sound better. From there I use aftermarket ethernet cables with an audiophile switch in between. They really do help with “removing unneeded digital artifacts” but it requires a good DAC and streamer in place to make them worthwhile. Once a good DAC and streamer/server are in place, don’t hesitate to address the internet chain
Also, many DACs and single-box DAC/streamer/servers, even expensive ones, have built-in attenuators, but it doesn’t necessarily mean those attenuators are any good. The Aurender A15 is very good as a DAC and streamer/server, but you’ll get the best out of it by bypassing volume settings and setting it to line level and having a great-performing standalone preamp in front of it.