Marshall's guitar amp-inspired Bluetooth speakers feature upgraded drivers and connections for a “more powerful, room-filling sound"

Marshall Acton IV
(Image credit: Marshall)

Marshall has updated two of its long-running home-based Bluetooth speakers with the launch of the Acton IV and Stanmore IV models.

Building upon the existing Acton and Stanmore models, the fourth-generation speakers feature upgraded tweeters and waveguides, updated connectivity and a refreshed design.

The updated tweeters and waveguides on both models aim to deliver “a wider, more evenly dispersed and expansive soundstage.” Both home speakers have a similar configuration of two tweeters and a woofer, with the bigger Stanmore IV model featuring a larger woofer driver.

Latest Videos From

The bass ports on both models have been redesigned for improved airflow, which should result in “cleaner and more powerful” bass performance. Marshall says the cables have also been repositioned to allow the speakers to be placed “flush against a wall without affecting audio quality”.

Along with Bluetooth and higher-quality LDAC codec support for streaming from mobile devices, both speakers feature a 3.5mm auxiliary and new RCA stereo inputs. The latter lets you connect a variety of audio sources, for instance, a turntable with a built-in phono stage such as the Sony PS-LX3BT.

The Acton IV and Stanmore IV both feature a ‘Dynamic Loudness’ setting, which automatically rebalances bass and treble frequencies in order to preserve “clarity, richness and warmth” at any volume. Improved limiters in the new models also promise to deliver a “cleaner” sound when playing at high volumes.

Marshall Stanmore IV lifestyle

(Image credit: Marshall)

Although the classic look of the popular guitar amp-inspired home speakers has been preserved, their retro brass control panel sees physical improvements to the controls. On-board controls include tonal adjustments and a "media jog" that lets you play/pause/skip songs. A brand new ‘M-button’ also allows users to easily switch between EQ settings and Spotify Tap options.

For further customisation, the dedicated Marshall app allows users to adjust EQ presets and “optimise audio” with placement compensation settings. Notably, built-in Auracast technology means that Acton IV and Stanmore IV can be connected to each other for multi-speaker listening.

To integrate older-generation Acton III and Stanmore III models into a multi-speaker set-up, you will need to purchase Marshall’s streaming hub, called Heddon, to bridge the gap between generations. This is available for £180 on its own, and is free of charge when buying two or more eligible Marshall home speakers.

According to Simona Berbec, Product Manager at Marshall Group: "These always-in-place speakers... [are] chosen time and again for their iconic design, premium build quality, rich, powerful sound, and intuitive tactile controls. With our fourth generation, the focus has been on protecting and strengthening these core qualities, building on what people love rather than reinventing it.”

The Marshall Acton IV and Stanmore IV speakers, priced at £260 / $300 and £350 / $400 respectively, are available to buy from today in black or cream finishes.

MORE:

Marshall's guitar amp-inspired Stockwell III is a small, portable speaker with a big battery life

Marshall is bringing big party speaker vibes to a smaller but still powerful form

Best Bluetooth speakers 2026: tried and tested for every budget

Ioan Hazell
Staff Writer

Ioan Hazell is a staff writer at What Hi-Fi?. He has previously written for The Sunday Times Culture Magazine, Museum's Journal, and a number of arts and culture publications. Outside of work, he is generally found running, writing, or gigging.

You must confirm your public display name before commenting

Please logout and then login again, you will then be prompted to enter your display name.