Hi @RobbinsPowell,
Welcome to the Roku Community!
We currently don't have any information to share about when or if adding one subwoofer to the Roku Soundbar will be available on our platform, but you can always check out our blog for the latest news and upcoming updates. We'll also make sure to share your feedback with our team.
Don't hesitate to let us know if you have any questions or additional feedback.
All the best,
Chel
Jecheal R.
Roku Community Moderator