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BOOM 4
Get sound that’s big, bold, and balanced, all in one compact, portable Bluetooth® speaker. Equipped with one-touch music control, a drop-proof, waterproof, dust-proof IP67 rating, and stunning high performance fabric, it’s the ultimate go-anywhere speaker that’s more bold and bassy than ever.
LOUD AND CLEAR
BOOM 4 packs a sonic punch for its size. Featuring Ultimate Ears unique audio processing, it produces clear and balanced audio faithful to the music you love, and at every volume level.
SPATIAL 360° SOUND
With the iconic cylindrical design, we pioneered to deliver immersive, stereophonic audio that radiates evenly in all directions.
DEEP ACCURATE BASS
BOOM 4 gives your music a deep, rich bass. Enjoy the punchy bass without exaggeration or distortion.
SIGNATURE + 4 PRE-SET EQ MODES
Enjoy the Ultimate Ears Signature sound and several EQ modes like Bass Boost, Cramped Space, Deep Relaxation, and Podcast/Vocal from UE | BOOM App. Didn’t find your favorite? Customize it yourself.

BOOM 4 was born to hit the road. From rooftop-raging to mountaintop-shredding, BOOM 4's got your back. It’s IP67 rated, waterproof, floatable and drop-proof. Take it anywhere. It's more powerful than you expect.

BOOM 4 gives you 15 hours of sonic power on a single charge.This portable speaker has long battery life that keeps the party going.

Use PartyUp on the UE | BOOM App to pair 1, 2 , 3... and over 150 speakers and create the ultimate sound experience. You can combine multiple BOOM 4, MEGABOOM 4, EVERBOOM, EPICBOOM and HYPERBOOM speakers or even pair them with previous generation BOOM speakers. Build a wall of sound? No problem.

One tap to dive in. Play, pause, and skip tracks directly from your BOOM 4. Set up one-touch playlists on your favorite streaming platforms like Spotify®, Amazon Music on Android,and Apple Music for iOS by UE | BOOM App.

Plastic parts in BOOM 4 include a minimum of 52% certified post-consumer recycled plastic by weight. It’s also designed for recycling.

Loudspeakers
Number of speakers: 1
Number of drivers: 4
Number of passive radiators: 2
Passive radiator size (W x D): 46.1 x 65.2 mm
Driver diameter: 4 cm
Audio
Sound pressure level (max): 85 dB
Ports & interfaces
Connectivity technology: Wireless
Feature: Bluetooth
Bluetooth profiles: A2DP
Bluetooth range: 45 m
Feature: USB connectivity
USB connector type: USB Type-C
Design
Product type: Stereo portable speaker
Product design: Cylinder
Product colour: Red
Volume control: Buttons
Feature: On/off switch
Protection features: Dustproof, Splash proof, Waterproof
Feature: Hook
International Protection (IP) code: IP67
LED indicators: Bluetooth
Performance
Recommended usage: Universal
Feature: Equalizer
Feature: Bass adjustment
Feature: Remotely operated
Power
Battery type: Built-in battery
Battery life (max): 15 h
Weight & dimensions
Width: 73 mm
Depth: 73 mm
Height: 184 mm
Weight: 620 g
Packaging content
Cables included: USB Type-C
Feature: Quick start guide
Battery
Battery technology: Lithium-Ion (Li-Ion)