Marshall Kilburn III: The Ultimate Portable Bluetooth Speaker

Marshall has officially released the Kilburn III, the latest evolution of its popular portable Bluetooth speaker line. Building on its predecessors’ reputation for powerful, amp-inspired sound, the new Kilburn III delivers an impressive 50+ hours of battery life and brings a reengineered acoustic design aimed at music lovers who want more punch and portability.

Bigger Battery, Wider Sound

The headline upgrade is the playtime. At over 50 hours on a single charge, the Kilburn III more than doubles the battery life of the Kilburn II. That’s enough to outlast a weekend getaway or several backyard sessions without needing to reach for a charger.

A hand adjusting the controls on a cream-colored Marshall Kilburn III portable Bluetooth speaker with a vintage design.

A hand holding the Marshall Kilburn III portable Bluetooth speaker, showcasing its vintage design and built-in strap.

Marshall pairs that stamina with its 360° True Stereophonic sound, promising no blind spots thanks to a widened stereo setup and tuned wide-band drivers. The speaker is built to deliver strong mids, crisp highs, and deep bass at any volume level, with dynamic loudness tech that balances audio output even when the volume is maxed out.

Rock-Inspired Design with Practical Touches

True to the brand’s aesthetic, the Kilburn III keeps things vintage with tactile knobs and a removable strap that uses real guitar strap buttons. It’s available in two finishes (Black & Brass and Cream) that stay in line with Marshall’s stage-ready vibe.

A velvet-lined carry strap, IP54-rated dust and water resistance, and a built-in power bank for charging your phone make it suitable for both indoor setups and poolside playlists. From a quick move between rooms to a sunny afternoon outdoors, this speaker is built to keep up.

Custom Controls and Connectivity

Onboard controls let users tweak bass and treble manually or use the M-button to access custom presets. The speaker supports the latest Bluetooth connectivity, rounding out its balance of design and function.

Cream colored portable Bluetooth speaker with a textured surface, featuring a gold mesh grille, vintage-style knobs, and a carry strap.

Close-up view of the Marshall Kilburn III portable Bluetooth speaker showcasing its controls, including bass and treble knobs, and a stylish leather handle.

“Kilburn III represents a groundbreaking evolution in our product line,” said Hanna Wallner, Product Manager at Marshall Speakers. “We’ve enhanced its visual appeal, refined usability, and extended the playtime to over 50 hours.”