I bought a new Sony Highend TV65" and Bose Soundbar and Subwoofer 700 in summer 2019.
I had great difficulty connecting the subwoofer so that everything could be operated with the new Sony TV remote control. After a lot of effort it worked (however, the equalizer only works via the Bose mobile phone app).
I can't say anything about the old Bose subwoofer.
Good day
I only know that the Soundbar 70ü does not support Multiroom with deeper systems.
systems. This link may help
https://community.bose.com/t5...