(My apologies. I should have posted this is the Speakers section)

I’ve had a nightmarish experience with Sonos ever since the app debacle and I’m hoping someone is able to assist me getting a simple Arc Soundbar/Sub/Era 300 surround system up and running. I’ve attempted to hardwire all of them but the rear Era 300s simply REFUSE to connect via Ethernet. Granted, I already had two USB-C to Ethernet adapters from Insignia (Best Buy’s brand) on hand and I’ve been attempting to use those. Why spend an additional $80 on Sonos’ gear (for 2) if the underlying technology (USB-C to Ethernet) is brand agnostic?

Unfortunately, my rear ERA 300s grab a WiFi connection--and the overall system is now mixing WiFi with Ethernet--and I’m not getting rear channel sound. Under my system settings, there’s no way to “Enable/Disable” WiFi on the rears so I’m forced to accept however the app sets it up. This is absolutely maddening.

So here’s my question? Does the USB-C to Ethernet connector absolutely have to be Sonos? If so, how is USB-C to Ethernet proprietary?

For reference, below are the adapters I already had and thought I could use.

Link to Insignia product: https://www.bestbuy.com/site/insignia-usb-c-to-ethernet-adapter-black/6521726.p?skuId=6521726