Echo Sub review: A good bass add-on

Echo Sub review: Add some serious bass to your Echo or Echo Plus speakers

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Echo Sub delivers down-firing, 100W deep bass sound through a 6′′ woofer. Pair with one Echo or Echo Plus (sold separately) to enjoy dynamic music that fills the room. Pair with two of the same Echo devices for rich left/right stereo sound. Simple to set up and use—just plug in, open the Alexa app, and wirelessly connect to your Echo device(s) to control music with your voice.

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