Marshall unveils Acton IV and Stanmore IV speakers with repairable design

Marshall unveiled new Acton IV and Stanmore IV Bluetooth speakers on Tuesday, pairing updated sound hardware with a design that lets users replace some parts instead of replacing the whole unit. The launch puts repairability at the center of a home-speaker refresh that also leans on Bluetooth 5.3, Auracast and Marshall’s multi-speaker playback setup.

The smaller Acton IV uses one 4-inch woofer and two 0.75-inch tweeters with waveguides, while the larger Stanmore IV uses one 5-inch woofer and two 0.75-inch tweeters with waveguides. Marshall says the Acton IV reaches a maximum sound pressure level of 95 dB at 1 meter, measures 171 mm wide and weighs 2.65 kg. The Stanmore IV reaches 97 dB at 1 meter, measures 350 mm wide and weighs 3.99 kg. Marshall also says the Acton IV is made with 38% recycled materials, while the Stanmore IV uses 21%.

The repairability pitch is the most notable shift in the line. Marshall’s support pages show replaceable parts are available for the Stanmore IV, and the company says parts including knobs and feet can be swapped out. That matters in practical terms because those are the pieces most likely to show wear in everyday use. It is a meaningful step for a consumer speaker, but it looks more like a targeted repair program than a full modular overhaul: the company is opening the cabinet to maintenance, not redesigning the product around deep user serviceability.

Marshall also used the launch to tighten the speakers’ place inside its broader home-audio system. Both models support multi-speaker connectivity, customizable M-buttons, Bluetooth 5.3, and the Marshall app for EQ settings and room calibration. The Acton IV includes an AUX input, while the Stanmore IV adds AUX and RCA inputs. The two speakers are part of Marshall’s Homeline IV rollout, with release scheduled for this month. The Stockwell III is due in August.

The new speakers build on Marshall Group’s Heddon home-audio hub, launched on January 21, 2026, which uses Wi-Fi and Auracast to broadcast audio across multiple Marshall home speakers. That makes the Acton IV and Stanmore IV less like isolated products and more like nodes in a wider system, with repairable exterior parts adding a longevity argument to a line that still competes on size, output and room-filling sound.