Hi @DG01,
Welcome to the Sonos community and thanks for letting us know about your concern. Let me share this information with you. The Sonos Sub is compatible with your Sonos Amp. There's no option in the Sonos app to add the Sub to the Sonance speakers.
There are 2 ways you can add the Sub:
- If you are setting up a Sonos home theater speaker and Sub at the same time, set up the home theater speaker first.
- If you're adding a Sub to a Sonos speaker that is already set up, follow the steps below.
Let us know how you get on with the advice above and run a diagnostic report. Kindly include the confirmation number in your response for us to check. If you have any questions about this, please feel free to reach us back.