Marshall Kilburn III Portable Bluetooth Speaker

The Marshall Kilburn III combines iconic Marshall styling with powerful portable performance, delivering room-filling 360° sound wherever your adventures take you. Featuring Marshall's True Stereophonic technology, 50 watts of Class D amplification, over 50 hours of battery life, and an IP54-rated dust and water-resistant design, Kilburn III is built to perform both indoors and outdoors.

Bluetooth 5.3 with Auracast™, Dynamic Loudness technology, multipoint connectivity, and the Marshall Bluetooth app provide a premium wireless listening experience, while the integrated battery can even power your mobile devices through its USB-C port when you're on the go.

Legendary Marshall Sound Anywhere

Equipped with a powerful 4-inch woofer, dual 2-inch full-range drivers, and Marshall's True Stereophonic technology, Kilburn III delivers immersive 360° sound that reaches every listener. Dynamic Loudness continuously adjusts bass, midrange, and treble to ensure your music sounds balanced and powerful at every volume.

Built for the Road

Designed for life on the move, Kilburn III features over 50 hours of wireless playback, a rugged IP54-rated enclosure, replaceable battery design, and premium materials built to last. Fast USB-C charging, Auracast support, and power bank functionality make it the ideal portable companion for home, travel, camping, or backyard gatherings.

Features

• Marshall portable Bluetooth speaker
• Marshall True Stereophonic 360° sound
• 50W total system power
• Three Class D amplifiers
• 4-inch woofer
• Dual 2-inch full-range drivers
• Bass reflex cabinet
• Bluetooth 5.3 connectivity
• Auracast™ audio sharing
• Dynamic Loudness technology
• Multipoint Bluetooth pairing
• Marshall Bluetooth app support
• Programmable M-Button
• Over 50 hours of battery life
• Fast USB-C charging
• USB-C power bank functionality
• 3.5mm auxiliary input
• IP54 dust and water resistance
• Battery preservation mode
• Replaceable battery design
• OTA firmware updates
• Constructed using recycled and PVC-free materials

Specifications

Audio Performance

• Total Power Output: 50W
• Amplifiers: 3 x Class D
• Woofer: 1 x 4-inch
• Full-Range Drivers: 2 x 2-inch
• Cabinet Design: Bass Reflex
• Frequency Response: 45Hz – 20kHz
• Maximum SPL: 91dB
• Marshall True Stereophonic 360° Sound
• Dynamic Loudness

Connectivity

• Bluetooth 5.3
• Auracast™
• USB-C Charging / Power Output
• 3.5mm Auxiliary Input
• Marshall Bluetooth App
• Multipoint Bluetooth
• OTA Firmware Updates

Compatibility

• Smartphones
• Tablets
• Laptops
• Desktop Computers
• Portable Music Players
• 3.5mm Audio Devices
• Marshall Bluetooth App for Android & iOS
• Auracast Compatible Devices

Supported Audio Codecs

• AAC
• LC3
• SBC

Controls

• Multi-Directional Control Knob
• Volume Control
• Bass Adjustment
• Treble Adjustment
• Play / Pause
• Track Skip
• Programmable M-Button
• Marshall App Control

Battery

• Battery Life: Up to 50 Hours
• Charge Time: Approximately 3 Hours
• Fast Charging: 20 Minutes Provides Up to 8 Hours of Playback (30W USB-C PD Charger Required)
• USB-C Power Bank Function
• User-Replaceable Battery

Physical Specifications

• Ingress Protection: IP54 Dust & Water Resistant
• Width: 273mm (10.7")
• Height: 150mm (5.9")
• Depth: 169mm (6.7")
• Weight: 2.8kg (6.2lbs)
• Available Colours: Black & Brass, Cream
• Construction: PVC-Free with Recycled Plastic & Vegan Materials

What's in the Box

• Marshall Kilburn III Portable Bluetooth Speaker
• USB-C Charging Cable
• Quick Start Guide
• Safety & Warranty Documentation