Hi, I went through this with my system. Look at the specs. It's quiet right?
So, first I bought DX Engineering EMI RFI filters for the ethernet line. One on each end $50. I bought these as a trial to prove to myself that this conditioning stuff works. Then I would buy something more audiophile. About the same time, I got a new modem, still coax but a linear power supply. The speakers sounded better. The I bought a Furman Elite 15i. Plugged all my equipment into it. Around the house I plugged all the chargers, dimmers, etc into a furman ss6b. I have 3 of those. I have less than $500 invested. I am a firm believer the better you keep noise out of your streaming system. The sound is much better: Details, 3d and wide soundstage, bass i never knew could be so good, much more natural sounding.