Hi @uthankran,
Welcome to the Roku Community, and we appreciate you reaching out.
A few things to take note of: the reason you only have limited options when pairing speakers on your Roku TV is that some features are not available.
You can only pair both speakers when you're using a Roku Plus 4K Series TV. While on the other hand, you can add a Roku Wireless Bass or Roku Wireless Bass Pro to your Roku TV Wireless Soundbar. A Roku subwoofer enhances your listening experience with deeper, richer bass. Simply connect the power cable and follow the simple setup process to begin hearing and feeling more bass in no time.
I hope this helps you out!
Thanks,
Rey
ERey.
Roku Community Moderator