Marshall Stockwell III Portable Bluetooth Speaker - Black and Brass

Marshall Stockwell III Portable Bluetooth Speaker – Black and Brass

Take powerful Marshall signature sound wherever you go with the Marshall Stockwell III Portable Bluetooth Speaker. Designed for life on the move, Stockwell III delivers 40+ hours of portable playtime on a single charge, letting you enjoy music throughout the day and into the night. Its compact design, durable construction, and convenient carrying strap make it easy to bring your music anywhere.

Featuring True Stereophonic 360° sound, Stockwell III provides multi-directional audio that delivers the same quality and fullness of sound from every angle, so there is no need to find the perfect listening spot. Dynamic Loudness technology automatically adjusts bass and treble levels at lower volumes while maintaining a naturally balanced sound when turned up.

Built for both indoor and outdoor use, Stockwell III is rated IP55 dust and water resistant, helping it withstand dust, splashes, and everyday knocks. The iconic brass control panel features tactile controls, including dedicated bass, treble, and volume knobs, as well as a standalone power button, media jog, M-button, and Bluetooth button for intuitive operation.

Stockwell III also works as a charging bank, allowing you to charge compatible devices through its USB-C output while continuing to enjoy your music. The speaker features a replaceable rechargeable Li-ion battery and battery preservation settings accessible through the Marshall Bluetooth app to help extend battery lifespan.

Designed with sustainability in mind, Stockwell III contains 27% recycled material by weight, including recycled plastics, aluminium alloy, and rare-earth elements, helping reduce the demand for virgin resources.

Key Features

• 40+ hours of portable playtime
• True Stereophonic 360° sound
• IP55 dust and water resistance
• Dynamic Loudness for balanced audio at any volume
• Tactile heritage-inspired controls
• USB-C charging bank functionality
• Consumer-replaceable battery
• Bluetooth Multipoint connectivity
• Compatible with the Marshall Bluetooth app

Audio Specifications

• Driver Type: Dynamic
• Drivers:
  • One 3-inch woofer
  • Two 1.75-inch wide-band drivers
• Frequency Range: 54Hz – 20,000Hz
• Stereo/Mono: Stereo
• Maximum Sound Pressure Level: 86 dB SPL @ 1m
• Cabinet Principle: Sealed with passive radiator
• Equaliser: Yes

Amplifiers

• One 65W Class D amplifier for the woofer
• Two 31W Class D amplifiers for the wide-band drivers

Connectivity

• Bluetooth Version: 5.3
• Auracast: Supported
• Bluetooth Range: Up to 10m (32.8ft)
• Bluetooth Multipoint Connectivity: Yes
• Wired Connections:
  • AUX 3.5mm
  • USB-C
• Supported Codecs:
  • SBC
  • LC3
  • MPEG-2 AAC

Controls

• Bass control
• Treble control
• Volume control
• On/Off button
• Media jog control
• M-button
• Bluetooth button

Battery & Charging

• Battery Type: Rechargeable, replaceable Li-ion battery
• Playtime: 40+ hours
• Quick Charging: 20 minutes provides up to 7 hours of playtime with a 30W USB-C PD charger
• Full Charging Time: Less than 3 hours with a 30W USB-C PD charger
• Power Input: USB-C 9V/3A, 5V/3A
• Battery Preservation: Yes
• Exchangeable Battery: Yes
• USB Output: Type-C, Charge Out 5V/3A

Physical Specifications

• Dimensions (H x W x D): 180 x 162 x 74 mm
• Weight: 1.3 kg
• Water Resistance Rating: IP55
• Colour: Black and Brass
• Materials: 27% recycled material by weight
• Repairability: Yes

In the Box

• Marshall Stockwell III Speaker
• Carrying Strap
• USB-C to USB-C Charging Cable
• Quick Start Guide
• Legal and Safety Information