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 and a 6-inch downward firing woofer and will work when paired with either a lone Echo or a pair, for a true 2.1 stereo setup. The stereo pairing feature is brand new, as well. Prior, you could only group separate Echo devices together for multi-room listening.