Marshall Bromley 450 Portable Wireless Party Speaker - Black/Brass

Whether the party is indoors or out, don't worry about sacrificing the sound quality. This portable speaker lets everyone know the party is on thanks to True Stereophonic 360 sound that travels far. It can play free from wires for 40+ hours and take a bit of dirt and water, so no need to stay inside. The integrated stage lights make it the centre of attention in any setting. Living room, festival or backyard - this Bluetooth party speaker goes the distance.

TRUE STEREOPHONIC 360 SOUND

Whether you're dancing at a house party or festival campsite - the music always feels close with a sound that gets around. Regardless of where you stand, every beat finds its way to you for maximum impact. Drivers on all sides mean slipping right into dancefloor mode for an unparalleled experience. All you have to do is press play to let everyone know the party has started.

40+ HOURS OF PORTABLE PLAYTIME

They say nothing good happens after 2am but with Bromley 450's long playtime that's for you to find out. Made to keep the party going no matter where you are, this speaker lets you play 800 songs back-to-back. Buy an extra battery to keep on standby for when power is running low, or use the AC cable to plug in your speaker. This can also be used to recharge your battery.

INTEGRATED STAGE LIGHTS

We've been the life of the party since 1962, so we know what makes for a good light show. Take it back to your best gig memories with three presets that each add to the energy of the party in their own unique way. The first preset creates the perfect ambient lighting to get going to, while the second and third turn things up even more by dynamically moving to the music. Now you can light up the dancefloor, literally and figuratively.

MIC & INSTRUMENT INPUTS

The most memorable shows are the ones you didn't expect. With inputs for both mic and instruments, you can turn the party into an impromptu gig or karaoke session without any hassle. So add that live musical layer and give your friends a night to remember.

DIRT & SPLASH RESISTANT

With Bromley 450's IP55 rating it's easy to pick your next party location. Park, festival or backyard - dirt and water splashes are no problem for this portable speaker. It'll keep the party going anytime, anywhere. Taking a bit of a break in between parties? Don't worry. A bit of dust during downtime won't hurt it either.

BUILT-IN HANDLE

Take the party as far as you can go. Having brought music on the road since way back when, we knew what we were doing when designing this impressive party speaker. With its built-in handle, Bromley 450 is easy to bring with you no matter how secret the location. Whether you want to go all out at the beach or set the mood in the festival camp, just pop it in the trunk of your car or carry it on the train.

Product longevity

When designing, we prioritise durability, repairability, and replaceable components to extend product lifespan and reduce waste. Bromley 450 comes with an easily replaceable LFP battery3, featuring adaptive charging technology that helps protect battery health over time. You can purchase replacement batteries at marshall.com.

Recycled content

Bromley 450 contains 15% recycled material by weight , reducing the need for virgin resources. This helps minimise environmental and social impacts associated with raw material extraction and processing. Using recycled content also helps lower carbon emissions compared to producing virgin materials .

- Includes post-consumer recycled ABS, post-consumer recycled PC-ABS, pre-consumer recycled aluminum alloy, pre-consumer recycled praseodymium-neodymium (rare-earth elements), and post-consumer-recycled polyester. Calculations are based on total product weight, excluding accessories and packaging.

- Industry data indicates recycled materials generally have lower carbon footprint than virgin materials; actual reductions vary by material and process.

- Bromley 450 uses a Lithium Iron Phosphate (LFP) battery, free from cobalt and with minimal nickel content (~0.25%). This reduces reliance on some critical raw materials linked to social and environmental challenges. Battery still contains lithium and other critical minerals. Compared to conventional Lithium-Ion (Li-ion) batteries, LFP offers a longer cycle life and enhanced safety, with a significantly lower risk of thermal runaway. The trade-off is that LFP technology is generally heavier and has lower energy density, which is why Li-ion remains common in devices where weight and compactness are key. For applications where durability and sustainability matter most, LFP is a strong choice. Please recycle old batteries and electronic products responsibly.

23% of the product is made of plastics and 60% of plastics are from recycled sources.
11% of the product is made of metals and 2% of metals are from recycled sources.
2% of the product is made of textile and 17% of textile are from recycled sources.

All percentages are calculated by weight.
Accessories (such as the battery pack and AC cable) are excluded from these calculations.

Specifications:

Power off timer/standby timer : 20 minutes

Power output (W) : 400

Quick charging time : 20 minutes gives 6 hours

Number of Programmable Buttons : 1

Number of wireless connectivity : 2

Number of outputs : 2

Number of wired connectivity : 5

Number of inputs : 5

Wired connectivity types : 3,5 mm aux audio in;RCA audio in;XLR/6.3mm Combo jack;USB-C

Power supply : AC;Battery

Source select : AUX;Bluetooth;RCA;USB-C

Wireless connectivity types : Bluetooth;LE Audio

Power Plug : Figure 8

IPX Rating : IP55

Other controls : lights, source picker, effects, M-button, bass, treble, volume, inputs volume, media jog

Manufacturer : Marshall Group

Name of third party service integrations : N/A

Voice controls : N/A

Audio codecs : SBC;AAC(MPEG-2);LC3

USB generation : USB-C

Audio controls : Bass;Forward;Pause;Play;Reverse;Treble;Volume;Delay;Reverb/Delay

Included in the package : Battery;Quick start guide;Legal and safety information;Power supply cable

Special features : Dustproof;Portable;Waterproof;Tactile control;Built-In Powerbank;LED Light;USB Port;Handle;Lightshow;Microphone Input;Instrument Input

Are batteries required? : No

Battery Integrated In Product : No

Audio cable included : No

Radio Tuner : No

Speakerphone : No

Stereo pairing available : No

Wireless charging : No

UI controls on device : Power on/off;Source;Play/pause;Volume;Skip track;Bass;Treble;Bluetooth Pairing;Master Volume;Reverb;Reverb/Delay

Compatible devices : Cellphones;Desktops;Laptops;Music Production Equipment;Tablets;Telephones;Television;Guitar;DJ board;Turntables

Controller types : Button;App;Encoders;Switch;Dials;Front panel;Front/Rear panel;Rear Panel

Compatible app : Yes

Battery included : Yes

Replaceable battery : Yes

Bass LED indicator : Yes

Treble LED indicator : Yes

Source LED : Yes

Volume LED indicator : Yes

Sound character LED : Yes

Input 1 LED : Yes

Input 2 LED : Yes

Effect LED : Yes

Light mode preset LED : Yes

BT Pairing : Yes

Multi speaker connectivity : Yes

Power button : Yes

Quick charge : Yes

USB charging : Yes

Recommended uses : For music players;For smartphones or tablets;Disc Jockey Use

App functions : Battery status;OTA updates;M-button;Auto-off timer;Standby timeout;About device

Protective Qualities : Water resistant

Mounting type : Tripod

Country of origin : China

Name of compatible app : Marshall Bluetooth

Software updates OTA : Yes

LED indicators : Source;Power;Bass;Battery level;Bluetooth pairing;Bluetooth connection;Charging;OTA updates;Factory data reset;Treble;Volume

Surround Sound Channel Configuration : 2.0

Custom EQ : 0

Number of Microphones : 0

Microphone type : N/A

Microphone Sensitivity : 0

Impedance (Ohm) : 4

Number of Mid-range drivers : 0

Number of woofers : 2

Number of tweeters : 0

Frequency range min (Hz) : 42

Frequency range max (Hz) : 20000

Number of Full Range Drivers : 4

POWER : 400

Maximum SPL (dB) : 100

Frequence range (Hz) : 42-20000

SPKR Outputs : 3.5mm TRS;6,5mm 1/4"

THD : < 10%

CLASS : Class D

Driver type : Dynamic drivers

Microphone : False

SPKR Inputs : RCA;3.5mm TRS;6,5mm 1/4";LE-Audio;USB-C;Bluetooth

Cabinet type : PSR-Assisted

Speaker features : None

Type of Speaker : Party speaker

Audio output mode : Stereo-Mode

Acoustic Transducers : FullRange;Woofer;PSR

kWh/battery : 0.09216

Power consumption standby (W) : 0.3

Number of batteries in product : 1

Power consumption on-mode (W) : 4.7

Battery pack, number of cells : 6

Battery voltage (V) : 9.6

Battery life (hours) : 40

Maximum distance bluetooth (m) : 70

Maximum input power from mains (W) : 120

Charging time (minutes) : 210

Battery weight (g) : 915

Battery weight per battery (g) : 915

Battery capacity (mAh) : 5000

Battery size : 134 x 67 x 99

Bluetooth version : 5.3

Playback via : AUX-IN;RCA;USB;Bluetooth

USB charging rating : Battery pack only: 5V/9V/12V/15V 3A, 20V 2.25A (45W USB-C PD)

Power source type : Battery;Mains

Battery model name : C129G8-26700-3S2P

Battery cell composition : LFP

Power source : Mains

Battery specification : Nominal voltage: 9.6V, Rated capacity: 9600mAh, Rated Energy: 92.16Wh

Input voltage protection (V) : Not Applicable

Battery brand : Tenpower

USB protocol : USB 2.0

Category of Battery : Portable

Battery cell type : Cylindrical

Is Battery Rechargeable : Yes

Charging method : Mains;USB-C

What's in the box
1 x Marshall Bromley 450 Bluetooth Party Speaker