Amazon has announced the Echo Sub, a new subwoofer accessory that can be wirelessly paired with either a 2nd-gen Amazon Echo or the new 2nd-gen Echo Plus to add more bass to your music. It features a 6-inch downward-facing subwoofer with 100 watts of power. It can also be used with a pair of Echos to create a stereo 2.1 sound system, where each Echo acts as either the left or right channel. The Echo Sub is available to pre-order now for $129.99 and will arrive on October 11th. You can also order a bundle that includes the Echo Sub and two Amazon Echos for $249.97, which saves you $80 versus buying each item individually. Read more ›