updates the Echo Lineup and Introduces the Echo Sub, a sub-woofer for your Echo devices - Tech Raman
Echo Sub: a $129.99 subwoofer that pairs with Echo speakers - The Verge
Echo Sub review: Echo Sub is $130, turns Echos into a 2.1 system - CNET
echo sub: Echo Sub review: No more bass complaints - The Economic Times
Echo Sub - Review 2023 - PCMag Middle East
Echo Sub Review: Alexa, Goes Boom!
echo sub: Echo Sub review: No more bass complaints - The Economic Times
Technical Reviews Sumitomo Electric
On A Tangent Podcast - Faculty of Science - Toronto Metropolitan University
Echo Sub Review: Alexa, Goes Boom!