Side-by-side on the specs that matter, with category winners and an opinionated take to help you decide.
The choice is between a classic stereo speaker for dedicated listening and a modern smart speaker for whole-home audio.
Pick the Marshall Stanmore III if you want a bold, analog-style speaker for a single room with rich stereo sound.
Pick the Sonos Era 300 if you want a voice-controlled, multiroom speaker for modern smart home integration and spatial audio.
Ask anything — we'll answer with STANMORE III 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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