My setup gives excellent sound with the following:
- Synology NAS for file storage, Qobuz for more
- Roon running on a Nucleus-like NUC
- ASUS RT-AX86U router, TP-Link managed switch, wired Ethernet
- Auralic Aries G1 streamer to a good DAC and system
- Furman and Torus power conditioners/surge protectors
- Decent (Billy Bags) stands
What I don’t use are the following:
- Special power supplies or power cords on any of it
- Expensive interconnects or digital cables; no optical LAN here
- Vibration footers, pucks, Ethernet filters, gongs, crystals, DDC, etc.
Maybe those things could make the sound incrementally better. But it’s already so much better than most systems I hear, that I am not motivated. I'd rather listen to music. When I’ve tried tweaky stuff, it’s changed the sound less than moving my chair back or forward 6". So for me, all those tweaks are a nothing-burger.