Marshall is expanding its line of Bluetooth speakers with the new Acton IV and Stanmore IV. Staying true to the design inspired by the brand’s famous guitar amplifiers, these two fourth-generation models retain their visual identity while benefiting from technical advancements. Acoustic improvements, enhanced connectivity, and new customization features are among the key new additions. How do these new speakers actually differ from previous generations?
Optimized sound reproduction
The new Marshall Acton IV and Stanmore IV wireless speakers both feature a three-driver design, with a woofer and two tweeters. The brand has updated this fourth generation by incorporating new tweeters and a redesigned bass-reflex port to improve sound dispersion and bass response.
This design results in a wider soundstage, with the tweeters distributing sound more evenly throughout the room. The bass also gains in precision and impact, while the Dynamic Loudness feature automatically adjusts the tonal balance based on the volume level to maintain a consistent sound, even at low volume. Both models also feature Placement Compensation technology, which adjusts the sound reproduction based on the speaker’s immediate surroundings to minimize the influence of reflective surfaces.
The differences between the two speakers mainly concern their size and power. The Marshall Acton IV features a 10 cm driver powered by a 60 W amplifier, paired with two 25 W tweeters, for a total power output of 85 W. The larger Marshall Stanmore IV features a 12 cm driver and delivers a total power output of 110 W, allowing it to fill large rooms with sound more easily.
Bluetooth 5.3, Auracast, and analog connectors
Both the Stanmore IV and Acton IV speakers feature a Bluetooth 5.3 controller compatible with Auracast technology. This technology allows you to stream music simultaneously to multiple compatible speakers to create a multi-room system via Bluetooth or to cover a larger area with a single audio source.
Marshall has also expanded the wired connector options. The Acton IV and Stanmore IV still feature a 3.5 mm mini-jack auxiliary input, which is now complemented by a stereo RCA input. These ports make it particularly easy to connect a turntable equipped with a phono preamplifier or any other analog source.
The new features also extend to everyday use. Both speakers feature a customizable ‘M’ button, which provides quick access to a favorite function or source. The physical controls, directly inspired by Marshall amplifiers, remain on the top of the cabinet. The Marshall app rounds off the package with options to customize the controls and sound settings to suit your listening environment.
A design true to the Marshall spirit
Marshall retains the aesthetic elements that characterize its audio equipment. A textured vinyl-style finish, a front grille, metal controls, and the iconic logo come together to create a look that’s instantly recognizable—one that fits just as well in a contemporary interior as it does in a more classic setting.
This new generation of connected speakers also marks a step forward in design. The Acton IV and Stanmore IV feature FSC-certified wood structures sourced from sustainably managed forests. The brand also notes that it is using more recycled plastics, metals, and magnets, while improving the products’ repairability and reducing their energy consumption.
Summary
With the Acton IV and Stanmore IV, Marshall is evolving its Bluetooth speakers without compromising the features that have contributed to their success. The improvements focus primarily on amplification power, a wider soundstage, and refined bass, as well as enhanced functionality thanks to Bluetooth 5.3, Auracast compatibility, a customizable M button, and the addition of an RCA input. These two models retain their visual identity while offering a more comprehensive listening experience and greater versatility for home use.
