With Echo Sub and a compatible Echo device, you can add rich bass to your music experience. Echo Sub delivers down-firing, 100W deep bass sound through a 6 woofer. When paired with your Echo device, you can feel the music as it fills the room just say Alexa, play music. Enjoy rich left/right stereo sound when you pair Echo Sub with two Echo (2nd Gen) devices or two Echo Plus (2nd Gen) devices for a wireless 2.1 stereo system. | Amazon Echo Sub for Echo Device