Can Avantree Auracast devices work with JBL Auracast speakers?

Yes — but only one way.

JBL speakers that support Auracast can broadcast audio. Avantree Auracast receivers (AuraGo, AuraClip, HomeBuddy/ShareCast, Infinity, etc.) can join this broadcast and play the sound.

However, JBL Auracast speakers cannot receive Auracast audio from third-party transmitters (including Avantree transmitters). They only accept Auracast signals from another compatible JBL speaker.