Ethernet cable upgrade

[K4680]

Dear fellas,
I would like to present here my present network configuration.
I m planning to enhance the network quality by upgrading the standard sheap ethernet  cables i m currently using, and i was wondering what s the best way to do it???!!!
I was thinking of buying only one  audioquest vodka ethernet cable and put it between the switch and the devialet, but then i tought may be one more between ethernet port and macbook pro could be nice also.
I m curently streaming tidal via roon/air with macbook pro wired to the ethernet port.
I need to have the router 2 for wifi, used for the family browsing , tv, satellite box.
I ve tried in the past to connect my devialet direct to router2 , with the same config without success and concluded that it was due to devialet and macbook receiving different ip adresses from 2 different routers.
After using the switch , problem solved, streaming from macbook is rock solid and sq is good.
I hope i made my self clear and simplified the connections, any help in the current config will be much helpfull and where to enhance the ethernet cables.
Thks again




Macbook pro -Air-Roon/-tidal-Devialet200 /frw 10.1.0-power cord burmester: vde reg nr9990
Power conditionner:isotek evo3+isotek sequel pc
Spkr cables: acoustic zen satori
Speakers:wilson audio sabrina

Hello Samsoum, I would try the following. Install a switch on Eth-Point MacPro and from there with a high quality cable to Devialet.
The advantage is that only the traffic between the Internet, notebook and devialet takes place on this cable. Since the point is connected via its own cable with the router 1.
It's worth a try!