Hello @Philip_Murray,
Thanks for letting me know that info. I am not sure if I have asked you this before, but how are the LSX connected to the network? Are they on WiFi or Ethernet? Are they connected to each other using Ethernet or the KEF wireless protocol?
I ask this because I have also tested LSX speakers and noticed similar behavior to the one your reported regarding higher sample rates, but then was unable to reproduce this issue in the lab where the network is configured a bit better and the speakers were connected by Ethernet.
Can you please give that a try (even if temporarily) and let me know if it changes anything? Also, I would double check that your network also meets our Networking Best Practices Guide.
Thanks,
Noris