Hi @SLYSOWSKI,
A warm welcome here in the Roku Community!
We're glad to assist you with your inquiries on setting up your Roku TV to upgrade audio. A Roku TV Wireless Soundbar is designed to work exclusively with your Roku TV and cannot be connected to any other type of TV or a Roku streaming player. You can check out this link here for more details on how to set up your Roku TV Wireless Soundbar. You do not need a Roku streambar since you are already streaming through the Roku TV. A Roku subwoofer enhances your listening experience with deeper, richer bass, so if you do not need it, you don't have to add it.
Please let us know if you have more inquiries.
Kind regards,
Eunice
Eunice L.
Roku Community Moderator