Second post here, second para states that BC2 goes to A.Opt 0 if no speakers are connected – and post was made by quite an experienced poster/founder member.
https://archivedforum.beoworld.org/forums/t/13784.aspx
And a post here says it goes to A.OPT 6:
https://archivedforum2.beoworld.org/forums/p/12695/110803.aspx#110803
And here:
https://archivedforum2.beoworld.org/forums/p/49635/349244.aspx#349244
Location: Warwickshire, UK
My B&O Icons:
