Side-by-side on the specs that matter, with category winners and an opinionated take to help you decide.
You're choosing between a dedicated subwoofer for a full sound system and a powerful standalone smart speaker.
Pick the Polk Audio React Sub if you already own a compatible soundbar and need deep bass for movies.
Pick the Sonos Era 300 if you want a complete, premium smart speaker for music listening in a single room.
Ask anything — we'll answer with Polk Audio React Sub and Sonos Era 300 in mind for home use.
Pindear may earn a commission when you buy through these links. Winners are determined by numeric spec comparisons only; non-numeric features (app quality, ecosystem, real-world feel) are covered in the verdict.
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