What's a thread? If you mean write your problem or situation in this box, then say so! OK, I have an old 1999 Bose Lifestyle 8 system with only analog audio in jacks (RCA) and no optical input jacks. I just bought a new Samsung 65" UHD4K tv and it only has HDMI, HDMI (ARC) and optical out. What do I need to convert this to analog so the fantastic Bose sound system can take it?? Thanks!