The Echo and Sub are no longer available as a 3-piece bundle, though you can still purchase the components separately. The Echo Sub
Echo Sub review: Exactly what you need for Alexa-powered music
Echo vs. Google Nest. Which Should You Buy in 2023?
announces new Echo Sub — A subwoofer accessory for the Echo and Echo Plus
Create a home theater with Fire TV and Echo speakers - Gearbrain
s Leader on Alexa, Echo and Other Devices Plans to Leave - WSJ
Echo Sub review: All about that bass and we're delighted Review
Is the Echo Sub worth buying over other speakers in 2022?
Is the Echo Sub worth buying over other speakers in 2022?
Echo Sub Review
Is the Echo Sub worth buying over other speakers in 2022?
Echo Sub: Good Hardware Meets Limited Software