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: Good Hardware Meets Limited Software

s New Echo 3 Generation – Review

How to pair an Echo Sub with an Echo speaker

Which Echo speaker should you buy?

Echo buying guide: There's a smart speaker for everyone

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

Echo Sub - Charcoal – Helm Workplace Experience

Echo Sub review: Getting serious about sound

Echo Sub review: Echo can finally go deep - CNET