How to create an Alexa Home Theatre or Cinema system with your Echo and Fire TV

Amazon lets you sync up Echo speakers for multi-room audio, and it lets you use an Echo speaker to control a Fire TV. Now, you can link up Echo speakers and a Fire TV for simultaneous wireless audio output.

Source : https://www.pocket-lint.com/how-to-create-an-alexa-home-theatre-system-with-your-echo-and-fire-tv-devices/