I think a secondary zone is surely the intended target but the lack of an optical output makes connection to my F80 more convoluted.

If I decide to ignore MQA, a Bryston Pi may be a better option.

Main system - Sources (Kodi-HTPC, Vero 4k, FireTV, Sat) into Trinnov Altitude 32 (8-16) (+Roon), Trinnov Amplitude 8 amp & Vivid Audio (Giya G3, V1.5) and REL Stentor III speakers. Others: F80 + Raspberry Pi and other Pi systems.