Marshall Stanmore IV vs Sonos Era 100 SL

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Stanmore IV compared with Era 100 SL

	MarshallStanmore IV	SonosEra 100 SL
Overview
Released
Released	July 2026	March 2026
Sound
Type
Type	Speaker	Speaker
Channels
Channels	Stereo	Stereo
Dolby Atmos
Dolby Atmos	No	No
Drivers
Drivers	One 5-inch woofer and two 0.75-inch tweeters with waveguides; bass-reflex cabinet with a redesigned port	Two angled tweeters and one mid-woofer
Amplifiers
Amplifiers	One 60 W class D for the woofer, two 25 W class D for the tweeters	Three class-D digital amplifiers
Frequency response
Frequency response	36 Hz – 38 kHz; up to 97 dB SPL at 1 m	–
Room tuning
Room tuning	Placement compensation and EQ presets in the Marshall app; Dynamic Loudness; bass and treble knobs	Trueplay (iOS device required); bass, treble and loudness adjustable in the Sonos app
Connections
Wi-Fi
Wi-Fi	No	Yes
Bluetooth
Bluetooth	Yes	Yes
AirPlay
AirPlay	No	Yes
HDMI eARC
HDMI eARC	No	–
Voice assistants
Voice assistants	None	None
Wi-Fi
Wi-Fi	–	Wi-Fi 6 (802.11a/b/g/n/ac/ax), 2.4 GHz and 5 GHz
Bluetooth
Bluetooth	Bluetooth 5.3 with Auracast; SBC, AAC, LDAC and LC3; multipoint; 10 m range	Bluetooth 5.3
Ports
Ports	RCA in, 3.5 mm aux in, mains power	USB-C for line-in (with the Sonos Line-In Adapter) or Ethernet (with the Sonos Combo Adapter); adapters sold separately
Streaming
Streaming	–	Apple AirPlay 2; direct control from apps such as Spotify and TIDAL; Sonos Radio
Multi-room
Multi-room	Auracast with other Acton IV and Stanmore IV speakers; Acton III and Stanmore III through the Heddon hub	Groups with other Sonos products over Wi-Fi; two make a stereo pair or rear surrounds for a Sonos soundbar
App
App	Marshall app	Sonos app (iOS and Android)
Design
Weight
Weight	3.99 kg	1.95 kg (better)
Controls
Controls	Bass, treble and volume knobs, media jog, M-button, source button, power switch	Capacitive touch controls (play, pause, skip, replay, volume, grouping); Bluetooth button
Microphones
Microphones	None	None
Mounting
Mounting	–	Era 100 wall mount and stand sold separately
Size
Size	350 × 203 × 185 mm (W × H × D)	182.5 × 120 × 130.5 mm (H × W × D)
Colours
Colours	Black, Cream	Black, White
In the box
In the box	Stanmore IV, mains lead, quick start guide, legal and safety information	Era 100 SL, power cable (2 m), documentation