The Amazon Fire TV Stick Lite and 3rd-gen Fire TV Stick are the latest Fire TV models to add support for being grouped with Amazon Echo speakers to form an Alexa Home Theater System. Using Echo speakers for improved Fire TV audio was first introduced with the release of the Echo Studio last year, thanks to its Dolby Atmos capabilities. The feature has since expanded to also include compatibility with the 1st & 2nd-gen Echo Plus, 2nd & 3rd-gen Echo, 3rd-gen Echo Dot (with or without clock), and the Echo Sub. All of these Echo speakers can be grouped, in the Alexa app, to the Fire TV Stick 4K, both 1st & 2nd-gen Fire TV Cubes, the 3rd-gen Fire TV, and now the two new 2020 Firesticks. Grouping the devices together into a Home Theater System allows the Fire TV’s audio to automatically and wirelessly use the smart speakers instead of your TV speakers. Instructions for how to do so can be found here.