I am pretty sure that these internal speakers won’t work, when the tv is connected to the BS Theatre. Connecting the tv and the Theatre requires activating ARC/eARC in the tv (and CEC), which normally would exclude sound from internal speakers. Only a test can tell. Maybe someone else has tried it. B&O once made a table of what is possible with 3rd party tv’s. The TCL is not in there, but it might give you an idea of the ‘troubles’ when not connecting to a recommended LG- tv.

I just thought maybe can add them to the center speakers? Just looking at whats out there that's new as haven't heard great things about the new LG G5 tv's loosing some of the codecs etc. Although it appears that updates have improved the TV. Budget isn't what it used to be... Maybe I'll wait and see whats coming next year? And lastly - just a bit bored at work (Winter here) and thought I would window/google shop and saw B&O on a TV! :) Thanks for the information, Millemis (MM) & taking the time to respond.