Marshall Bromley 750 – Portable Bluetooth Party Speaker with 360° Sound

The Marshall Bromley 750 Portable Bluetooth Party Speaker is designed to deliver powerful, room-filling and outdoor-ready audio with True Stereophonic 360° sound. With more than 40 hours of portable playtime, a maximum sound pressure level of 127 dB, multiple high-powered drivers, and Bluetooth 5.3 connectivity, music can be enjoyed throughout long parties, outdoor gatherings, events, and performances without being restricted by wires. Its sound has been tuned to perform consistently across different volume levels, allowing bass, mids, and highs to be heard with clarity and impact.

Built for both entertainment and performance, the Marshall Bromley 750 wireless party speaker is equipped with integrated stage lights, sound character controls, microphone and instrument inputs, and extensive wired and wireless connectivity. An IP54 dirt- and splash-resistant design allows the speaker to be used indoors or outdoors, while integrated wheels and handles make its large 23.9 kg body easier to transport. A rechargeable and replaceable LFP (LiFePO4) battery is included, and quick charging allows up to 5 hours of playtime to be provided from only 20 minutes of charging. The Marshall Bromley 750 has been designed and engineered in Sweden and made in China.

Key Features

True Stereophonic 360° Sound
Immersive 360° audio is delivered around the speaker, allowing powerful sound to be heard wherever listeners are positioned.

40+ Hours of Portable Playtime
More than 40 hours of playback can be provided by the rechargeable LFP battery, allowing music to continue throughout the day and into the following night.

Powerful Multi-Driver Audio System
Two 10-inch woofers, two 5.25-inch mid-range drivers, and four tweeters are used to reproduce deep bass, detailed mids, and clear high frequencies across a wide 20Hz–20,000Hz frequency range.

Up to 127 dB Sound Pressure Level
A maximum sound pressure level of 127 dB at 1 metre is supported, making the Bromley 750 suitable for large gatherings, parties, and outdoor entertainment.

Sound Character Control
The overall tone can be adjusted to match the atmosphere and pace of the party, while dedicated bass and treble controls are also provided.

Integrated Stage Lights
A built-in light show is included, with three stage-inspired presets available to complement music and create a more engaging party environment.

Microphone & Instrument Inputs
Two XLR/6.35 mm combo inputs are provided, allowing microphones or instruments to be connected directly to the speaker. Individual volume and effect controls are provided for both inputs.

IP54 Dirt & Splash Resistance
An IP54 rating is provided, helping protect the speaker against dirt and splashes so it can be used for both indoor and outdoor entertainment.

Bluetooth 5.3 & Auracast
Wireless audio connectivity is provided through Bluetooth 5.3 and Auracast, with a Bluetooth range of more than 70 metres in a free field. Bluetooth Multipoint Connectivity is also supported.

Multiple Wired Connections
AUX 3.5 mm input/output, USB-C, RCA, and two XLR/6.35 mm combo jacks are included for flexible connection to different audio sources and equipment.

Built-In Wheels & Handles
Integrated wheels and handles are provided so the large portable party speaker can be transported and repositioned more easily.

Quick Charging & Replaceable Battery
The rechargeable LFP battery can be fully charged in approximately 3.5 hours. With quick charging, approximately 5 hours of playback can be provided from a 20-minute charge. The battery can also be exchanged when required.

Specifications

Audio Specification

• Driver Type: Dynamic
• Frequency Range: 20Hz – 20,000Hz
• Drivers: 2 × 10-inch 150W woofers
• Mid-Range Drivers: 2 × 5.25-inch 50W mid-ranges
• Tweeters: 2 × 1-inch 7W tweeters
• Additional Tweeters: 2 × 0.8-inch 14W tweeters
• Stereo/Mono: Stereo
• Maximum Sound Pressure Level: 127 dB @ 1 m
• Cabinet Principle: Closed system
• Equaliser: Yes

Power Amplifiers

• Woofers: 2 × 100W Class D amplifiers
• Mid-Range Drivers: 2 × 50W Class D amplifiers
• Tweeters: 4 × 50W Class D amplifiers

Physical Unit

• Weight: 23.9 kg / 52.7 lbs
• Weight Including Packaging: 33.5 kg / 73.9 lbs
• Width: 413 mm / 16.26"
• Height: 652 mm / 25.7"
• Depth: 355 mm / 14"
• Water Resistance: IP54
• Colorway: Black and Brass
• Repairability: Yes
• Light Show: Yes
• Portability Features: Integrated wheels and handles
• Country of Origin: Designed and engineered in Sweden. Made in China.
• Shipping Notice: Heavy shipment

Battery

• Play Time: 40+ hours
• Battery Type: Rechargeable, replaceable LFP battery (LiFePO4)
• Quick Charging: 20 minutes provides 5 hours of playtime
• Charging Time: 3.5 hours for a full recharge
• Power Input: USB Type-C, charge in/out 5V, 3.0A
• Exchangeable Battery: Yes

Power

• Mains Input Voltage: 100–240V
• Mains Frequency: 50/60Hz

Controls & Connectivity

• Wireless Connectivity: Bluetooth 5.3
• Auracast: Supported
• Wired Audio Connectivity: AUX 3.5 mm (input and output), USB-C, RCA
• Mic / Instrument Connectivity: 2 × XLR/6.35 mm combo jacks
• Bluetooth Range: >70 m / 229 feet in free field
• Bluetooth Multipoint Connectivity: Yes
• Mic/Instrument Input: 2 × XLR/6.3 mm combo jacks
• Codecs: SBC, AAC-MPEG 2 and LC3
• USB Specification: USB Type-C, charge out 5V, 3.0A

Top Panel Controls

• Power switch
• Source selector
• Media control
• Volume
• Bass
• Treble
• M-button
• Input 1 volume control
• Input 2 volume control
• Input 1 effect control
• Input 2 effect control
• Sound character
• Light mode
• Battery indicator

Included in the Box

• Marshall Bromley 750 Speaker
• Bromley battery, placed inside the speaker
• Mains lead
• Quick start guide
• Legal & Safety sheet

The Marshall Bromley 750 Bluetooth Party Speaker combines powerful 360° stereo sound, extended 40+ hour battery life, integrated lighting, flexible microphone and instrument connectivity, and a transportable IP54-rated design. With its high-output multi-driver system, Bluetooth 5.3, Auracast support, replaceable battery, quick charging, and integrated wheels and handles, it has been built for parties, outdoor gatherings, live performances, and extended listening sessions where powerful portable sound is required.