Marshall Bromley 450 Black & Brass Partybox

Bromley 450 is a portable party speaker from Marshall with True Stereophonic 360° sound and a maximum output of 100 dB at 1 m. Designed for outdoor and home use alike, it combines extended battery life, built-in stage lighting, and dedicated mic and instrument inputs in a rugged, IP55-rated enclosure.

True Stereophonic 360° Sound

Marshall's True Stereophonic 360° acoustic system distributes sound evenly in all directions, eliminating dead zones so every listener stays in the sweet spot regardless of their position around the speaker.

40+ Hours of Playtime

A rechargeable, replaceable LFP (Lithium Iron Phosphate) battery delivers over 40 hours of playtime at mid volume and charges fully in 3.5 hours. The battery can also be charged separately outside the speaker, and the unit operates on AC power even with the battery removed.

Mic & Instrument Inputs

Dedicated inputs for both a microphone and an instrument allow users to connect a vocalist or a guitar without additional equipment, turning any gathering into a live performance or karaoke session.

Integrated Stage Lights

Three selectable light show presets are built directly into the speaker, adding a visual element to any event. Each preset is designed to complement a different energy level and atmosphere.

IP55 Rating & Portability

An IP55 rating protects against dirt and water splashes, making Bromley 450 suitable for parks, backyards, and festival campsites. A built-in handle makes it easy to carry; the speaker weighs 12.32 kg with dimensions of 366 × 261 × 492 mm.

Bluetooth 5.3 & Auracast

Wireless audio streaming is handled by Bluetooth 5.3 with Auracast support, enabling connection to multiple listeners and devices simultaneously.

Sustainable Design

Bromley 450 is built with 15% recycled material by weight, including post-consumer recycled ABS, PC-ABS, and polyester, as well as pre-consumer recycled aluminum alloy. The cobalt-free LFP battery features adaptive charging technology to extend battery lifespan over time.