Thanks for the interesting question.
I have a S1 Pro and looking into purchasing a Bose 700 soundbar for my Television. I would like to verify that i connect the two together using the bose for music in the house as well as on patio using the S1. Thank you for any information.
Unfortunately, no. The Soundbar 700 cannot share music with the S1 Pro.
The Soundbar 700 can share music with other Bose Smart Home Speaker systems or the Bose Portable Home Speaker through your home network with the Bose Music app
The S1 Pro can share music with another S1 Pro or a SoundLink Revolve or SoundLink Revolve+ using Bluetooth with the Bose Connect app.
You might be able to use a third-party Bluetooth Multipoint transmitter to send a Bluetooth signal to the Soundbar 700 and one S1 Pro.
Here's a link to Bluetooth Multipoint and Dual Device transmitters on Amazon.
I haven't tried this so I can't suggest a specific transmitter.