Hi, @Mbram. Thank you for your post.
Thank you for contacting us regarding the setup of your Roku speakers. We would like to confirm that linking them is indeed possible. To ensure a smooth configuration, we suggest reaching out to Amazon's Device and Digital Content Support for dedicated assistance.
Furthermore, please explore our support page for helpful guidance on how to use Amazon Alexa to manage your Roku streaming device.
Hope this helps!
Thanks,
Jharra
Jharra Q.
Roku Community Moderator