Echo Sub: a $129.99 subwoofer that pairs with Echo speakers

is making a more serious foray into the home audio space with a subwoofer that can be paired to two Echo speakers for a 2.1 stereo system. Should Sonos be worried?

Echo Sub review: Add some serious bass to your Echo or Echo Plus speakers

Sonos Sub Mini Dual 6 Wifi Subwoofer Black SUBM1US1BLK - Best Buy

Echo Sub Review

launches Echo Buds, smart glasses, other Alexa products

announces new Echo Sub — A subwoofer accessory for the Echo and Echo Plus

Echo Sub review: Getting serious about sound

Echo Sub review: Add some serious bass to your Echo or Echo Plus speakers

Echo Sub 100W Subwoofer Charcoal B0798KPH5X - Best Buy

Official: Echo Studio Glacier White with Echo Sub

Comparing all the Echo devices - Echo Dot, Echo Pop and Echo Show

Echo Studio

Echo Sub: Good Hardware Meets Limited Software

just revealed its plan for total smart home domination

Best Echo Smart Speakers - Consumer Reports

Echo Sub review: Getting serious about sound