STOCKWELL III
Portable Bluetooth speaker with 40+ hours of playtime
Grab the carrying strap and take powerful sound with you. With 40+ hours of portable playtime on a single charge, there’s plenty of opportunity to set the tempo then change it up throughout the day. Wherever you are around the speaker, its powerful 360° sound brings the room to life. Built to handle everyday knocks and splashes, keep the music going outside without a second thought.
Features
- 40+ hours of portable playtime: Fill every hour with music that stays with you, wherever you decide to go
- True Stereophonic 360° sound: Get the same quality and fullness of Marshall signature sound as you move around
- Dust & water resistant: Handles dust and splashes of water from all directions
- Dynamic loudness: Get clear and balanced sound at whatever volume you choose
- Tactile controls: Adjust your sound and get straight to your preset using heritage amp-inspired controls
- Charging bank: Charge other audio devices and keep playing the music you love.

40+ hours of portable playtime
Pack your day with listening sessions from lights on to lights out. Wake up, make art, go skate, wind down. One charge delivers a solid 800 songs. Fill every hour with music that stays with you.
True Stereophonic 360° sound
Forget sweet spots and tune into Stockwell III’s unique form of multi-directional audio. Get the same quality and fullness of powerful signature sound as you move around it.


Dust & water resistant
Sure, it may look more like a timeless design piece, but don’t be fooled. Stockwell III is at home indoors but never afraid to venture outside. It braves water splashes and licks of paint from all directions.
Dynamic loudness
Never lose the details that make a song. Even at lower volumes, bass and treble rise to keep the kick and clarity. When you turn it up, your music levels out just as it should for a naturally balanced sound.


Tactile controls
A brand-new standalone power button, M-button, and media jog join the classic brass panel. Get instant access to your presets and skip through your favourite tracks with ease.
Charging bank
Stay on top of battery life wherever you take your music. Streaming from your phone? Connect it to the USB input, charge it up, and never let a listening session get cut short.


Making our products last longer
Marshall products prioritise durability, repairability, and replaceable components to extend their lifespan and reduce waste. Stockwell III comes with a consumer replaceable battery and has enhanced settings in the app to preserve the battery lifespan. You can purchase replacement batteries at marshall.com.
Materials
Stockwell III contains 27% recycled material by weight¹, reducing the need for virgin resources. This helps minimise environmental and social impacts associated with raw material extraction and processing. Using recycled content also helps lower carbon emissions compared to producing virgin materials².
¹Includes post-consumer recycled PC, post-consumer recycled PC-ABS, pre-consumer recycled aluminium alloy and post-consumer recycled neodymium (rare-earth elements). Calculations are based on total product weight, excluding accessories and packaging.
²Industry data indicates recycled materials generally have lower carbon footprint than virgin materials; actual reductions vary by material and process.

SPECIFICATIONS
- Driver Type: Dynamic
- Frequency range: 54 – 20,000 Hz
- Drivers: One 3 inch Woofer; Two 1.75 inch wide-band drivers
- Stereo/mono: Stereo
- Maximum sound pressure level: 86 dB SPL @ 1 m
- Cabinet principle: Sealed with passive radiator
- One 65 Watt Class D Amplifier for the Woofer
- Two 31 Watt Class D Amplifiers for the Wide-Band drivers
- Equaliser: Yes
- Wireless connectivity: Bluetooth 5.3, Auracast
- Wired connectivity: AUX 3.5 mm, USB-C
- Bluetooth range: 10m
- Top panel controls: Bass, Treble, Volume, On/off, Media jog, M-button, Bluetooth button
- Codecs: SBC, LC3, MPEG-2 AAC
- USB Spec: Type C, Charge out 5V, 3.0A
- Bluetooth Multipoint Connectivity: Yes
- Weight: 1.3 kg
- Width: 150mm
- Height: 181mm
- Depth: 72mm
- Water Resistance: IP55
- Colourways: Black and Brass, Cream
- Materials: 27% of the total product is recycled
- Repairability: Yes
- Country of origin: Designed and engineered in Sweden. Made in China.
- Play time: 40+ hours
- Battery type: Rechargeable, replaceable, Li-ion battery
- Battery Preservation: Yes
- Quick Charging: 20 minutes of charge time gives 7 hours of playtime with a 30W USB-C PD charger
- Charging time: <3 hours to full recharge with a 30W USB-C PD Charger
- Power input: USB-C 9V/3A, 5V/3A
- Exchangeable Battery: Yes
- Speaker
- Strap
- USB-C to USB-C charging cable
- Quick start guide
- Legal and safety information
- Marshall Bluetooth app
Common questions
True Stereophonic Sound is Marshall’s unique solution for multi-directional sound and custom tuning that makes the speaker produce a sound much larger than its size. True Stereophonic Sound creates a rich sound image that sounds more or less the same from all angles.
A device’s IP rating indicates how well it’s protected against water and dust. Stockwell III is IP55-rated meaning that it is protected from dust ingress and low-pressure water jets.
Yes, you can charge a device such as a phone or tablet using the USB-C cable provided with the speaker. Turn on the speaker, plug in your device using the cable and charge it.
Yes, you can repair your Stockwell III yourself by replacing certain parts, such as the silicone sleeve, strap or metal grille. As the battery ages, you can also replace it yourself. The spare parts you can replace yourself are available on marshall.com.
If you have a valid warranty claim, we offer repair at one of our authorised service partners. If your product needs repairs after your warranty period, we offer a paid repair service by authorised service partners using original Marshall parts. Note that repair service may vary between different markets.











