Just an add on for those considering or using a fiber optic solution run between switches (Cisco here) to the WiiM Pro.
The Finisar FLTX1474D3BTL (10km 1310 Single Mode) SFP+ is a significant improvement with one added to either end of a three meter fiber optic connection.
So, here it’s Verizon fiber optic router with ethernet out to a Cisco Meraki MS220-8P 8 Port Gigabit Ethernet Network Switch, one Finisar in the gigabyte port to another with fiber optic cable to another Finisar transceiver.
A very short (Blue Jeans) ethernet cable to the WiiM Pro (again run on a 5 volt LPS) and absolutely splendid results to tube monoblock amps.
Significant improvement for little cost: cascaded Cisco Merarki switches(unclaimed), Blue Jeans ethernet cables and Finisar SFPs. Great bang for the buck.