How can I improve my Ethernet setup?

[plissken]

On 3/14/2020 at 11:01 PM, hpfish said:

Here is my current setup:

Office: Dell i7/SSD Flac files/Roon—>Comcast modem/router ->50ft cat5–>Hifi room: TPLink switch—>40 feet CAT 7–>Lumin U1mini—>DAC

The SQ is decent, but I think can be improved.   
I have tried fiber optics Converters and Wifi, but did not like SQ.

Any suggestions to improve SQ of my current set up would be appreciated.

Thanks.

Get a measurement mic. Get a better understanding of your room. Better speakers always seemed to help.