https://www.theverge.com/2018/9/20/17880918/amazon-subwoofer-announced-echo-sub-alexa-price-release-date

In Amazon’s second (perhaps now annual) surprise Alexa event, it is making a bigger push into the home audio space with the Amazon Echo Sub. As was leaked yesterday, it’s a 100W subwoofer that is meant to supply the bass for a home audio setup. It can be paired with two “of the same compatible Echo devices” for full stereo pairing, and it will be controlled with the Alexa app or with your voice.

It ships later this month, available for preorders today. It costs $129.99.