Isn't it also only for 'control' ? Having spoken with Meridian and their views on WiFi, I don't think that they will support audio other than via wired connection. But this was a long time ago and their views may have changed.

Meridian owner since 1992
Prime & PSU, Focal Elear headphones, Roon (ROCK 8Gi5 NUC), Explorer 1 & 2, F80. 200/203, various Sonos (via Roon).