Hi all...I also have the S1, but I've never seen anything on updating firmware. Right now, everything works fine on mine. So how do I know when I need to update anything on it?
If you are using the Bose Connect App, tap the gear icon at the top right.
Then tap PRODUCT INFO
The latest firmware version is 7.0.10
If the firmware is not up to date, the App should automatically update the unit.
Or you can update the S1 Pro system with a MAC or PC. Go to http://btu.bose.com and follow the prompts on the screen.
More information here: S1 Pro System Updates
Does that help?