If you're using a Node for streaming, there are tweaks to increase the SQ. I upgraded the stock PC to an aftermarket C7 power cord which provided an audible improvement. I recommend Wireworld or Cullen, about $100 to $150.
Using an ethernet connection from the router rather than WIFI is also an improvement. I'm using CAT8.
And having the modem/router on a separate circuit than your audio will lower noise generated by RFI. There are other threads on how to improve Bluesound sonics.