Echo Sub: a $129.99 subwoofer that pairs with Echo speakers - The Verge

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 - Powerful subwoofer for your Echo - requires compatible Echo device : Devices & Accessories

Official: Echo Studio with Echo Sub

This bundle contains Echo Studio plus two Echo (4th Gen) smart speakers. For rich left/right stereo sound, pair the Echo Studio with both Echo devices

Echo Home Entertainment Bundle | Echo Studio + 2 Echo (4th Gen), Twlight Blue

Official: Echo Studio with Echo Sub

Echo Studio Smart Speaker with Dolby Atmos Review - My Site

Echo Pop Full sound compact smart speaker with Alexa - Charcoal + 4 months of Music Unlimited FREE : Everything Else

Echo Sub - Powerful subwoofer for your Echo - requires compatible Echo device : Devices & Accessories

Echo Sub review: Exactly what you need for Alexa-powered music

Echo Studio, Our best-sounding smart speaker ever - With Dolby Atmos, spatial audio processing technology, and Alexa