Echo Sub: a $129.99 subwoofer that pairs with Echo speakers

is making a more serious foray into the home audio space with a subwoofer that can be paired to two Echo speakers for a 2.1 stereo system. Should Sonos be worried?

s new Echo Dot & Echo Plus bring improved audio at no extra cost - PhoneArena

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Echo Sub - Powerful subwoofer for your Echo - requires compatible Echo device : Devices & Accessories

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