The Marshall Stanmore III is Marshall’s mid-size home Bluetooth speaker, positioned between the smaller Acton III and larger Woburn III in the Home Line lineup with the same guitar-amp aesthetic Marshall built its brand around. A two-way driver system with a 5.25-inch woofer and dual outward-angled tweeters produces 80W of amplification through the leather-wrapped cabinet. Bluetooth 5.2 supports the wireless connection to phones, and RCA and 3.5mm AUX inputs on the back accept a turntable or a direct wired source.
A portable Bluetooth speaker fit for a rockstar
Guitar amps are what Marshall built its brand on, and the Stanmore III wears that heritage on its sleeve with a leatherette-wrapped cabinet, script logo across the front grille, and a brass control panel on top. The physical controls on that brass panel manage source selection, volume, bass, treble, playback, and skip functions without needing to open an app. A brass power toggle on top powers the speaker on and off with a satisfying click. The overall look reads as an oversized combo amp.
The Stanmore III is made up of a two-way driver system consisting of one 5.25-inch woofer and two 0.75-inch dome tweeters that are powered by three class-D amplifiers for an overall output of 80W. In contrast to the tweeters being mounted side-by-side in the previous generation, they are angled outward from the center axis in the third generation, resulting in a larger soundstage than before. Dynamic Loudness processing keeps the tonality of your music consistent even when you have it turned down, maintaining full low-end response while preventing clipping during loud moments.
Wireless connectivity comes through Bluetooth 5.2 with LE Audio and Auracast readiness for future audio-sharing standards. Wired connections include an RCA input for turntables and other analog sources, plus a 3.5mm AUX for a direct cable from any device with a headphone jack. The Marshall Bluetooth app on your phone unlocks EQ presets, custom bass and treble adjustments, and firmware updates. Placement Compensation in the app also adjusts the sound signature based on where the speaker is positioned in the room.
Build materials on the Stanmore III include vegan leather over the cabinet exterior, a mesh speaker grille with the Marshall script logo, and a brass control panel on top. PVC-free construction and 70% recycled plastic go into the shell for a more sustainable build than earlier generations. The speaker measures 14 inches wide by 7.5 inches tall by 7.5 inches deep and weighs 10.8 pounds, sized for a bookshelf, sideboard, or kitchen counter. The unit plugs into a wall outlet.
Marshall built its reputation on guitar amplifiers, and bringing the same visual language to home speakers has been the company’s strategy for over a decade. The Stanmore III in the current Home Line updates the sound engineering with wider-firing tweeters and Bluetooth 5.2 while keeping the guitar amp aesthetic and analog controls that define the line. At $250, down from $400, the current sale takes 38% off retail on the middle tier of Marshall’s home speaker lineup.