How can I improve my Ethernet setup?

[pas]

On 3/14/2020 at 9:01 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.

Why the 50 foot cable followed by a 40 foot cable?

 

[pas]

1 hour ago, hpfish said:

When I built the hifi room years ago I ran the 50ft cable from upstrairs to the back of the hifi room, but my audio component rack is in front of the room.

Understood, thanks for replying. Upgrading of power supplies was my next suggestion, which you have already mentioned. Good luck!