Amazon's Echo Sub adds some much-needed bass to its smart speakers
 

The Echo is a fine enough smart speaker, but what it's lacking is any sort of oomph in terms of sound quality. That's why Amazon will release the Echo Sub this October. The diminutive bass-maker features 100W of power, a 6-inch downward firing woofer...

https://www.engadget.com/2018/09/20/amazon-echo-sub/