comments:
I've done this successfully with an active USB extension cable with my XR18. Specifically this 50 foot cable off of amazon. It was plugged into my high power USB 3 port on my laptop though, so while I know it works with that, your mileage may vary depending on the specs of your USB ports. I have not verified if it works with a typical 100 mA USB port. You are right though, there's not many great ways to do this without a second computer on stage. I have considered doing this with a second computer on stage running Dante VIA and a computer at FOH running DVS or VIA, but yeah, a second computer is always a another point of failure. I know there exists USB over ethernet devices, but I personally have not used any, and thus cannot attest to any specific device or brand.