Marshall Acton III vs Marshall Acton IV

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Acton III compared with Acton IV

	MarshallActon III	MarshallActon IV
Overview
Released
Released	June 2022	July 2026
Sound
Type
Type	Speaker	Speaker
Channels
Channels	Stereo	Stereo
Dolby Atmos
Dolby Atmos	No	No
Drivers
Drivers	One woofer and two tweeters angled outwards, with updated waveguides; bass-reflex cabinet	One 4-inch woofer and two 0.75-inch tweeters with waveguides; bass-reflex cabinet with a redesigned port
Amplifiers
Amplifiers	One 30 W class D for the woofer, two 15 W class D for the tweeters	One 60 W class D for the woofer, two 25 W class D for the tweeters
Frequency response
Frequency response	45 Hz – 20 kHz; up to 95 dB at 1 m	37 Hz – 38 kHz; up to 95 dB SPL at 1 m
Room tuning
Room tuning	Placement Correction in the Marshall Bluetooth app; Dynamic Loudness; bass and treble knobs on the speaker	Placement compensation and EQ presets in the Marshall app; Dynamic Loudness; bass and treble knobs
Connections
Wi-Fi
Wi-Fi	No	No
Bluetooth
Bluetooth	Yes	Yes
AirPlay
AirPlay	No	No
HDMI eARC
HDMI eARC	No	No
Voice assistants
Voice assistants	None	None
Bluetooth
Bluetooth	Bluetooth 5.2, LE Audio-ready; 10 m range	Bluetooth 5.3 with Auracast; SBC, AAC, LDAC and LC3; multipoint; 10 m range
Ports
Ports	3.5 mm in, mains power	Stereo RCA in and 3.5 mm aux in (the manual and feature list include RCA; the UK spec table lists only aux); mains power
Multi-room
Multi-room	None; Marshall says it can't be used in pairs or groups	Auracast with other Acton IV and Stanmore IV speakers; Acton III and Stanmore III through the Heddon hub
App
App	Marshall Bluetooth app (iOS and Android), with over-the-air updates	Marshall app
Design
Weight
Weight	2.85 kg	2.65 kg (better)
Controls
Controls	Source button, volume, bass and treble knobs, play/pause and skip control, power switch	Bass, treble and volume knobs, media jog, M-button, source button, power switch
Microphones
Microphones	None	None
Size
Size	260 × 170 × 150 mm	171 × 150 × 260 mm (W × H × D)
Colours
Colours	Black, Cream, Brown, Midnight Blue, Burgundy	Black, Cream
In the box
In the box	Acton III, mains lead, user manual and legal and safety information	Acton IV, mains lead, quick start guide, legal and safety information