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?

Echo Sub 100W Subwoofer Charcoal B0798KPH5X - Best Buy

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Echo Sub 100W Subwoofer Charcoal B0798KPH5X - Best Buy

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Official: Echo Studio Glacier White with Echo Sub