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JBL Boombox 4 · Photo source

JBL Boombox 4
Photo 1 of 19

JBL Boombox 4 · Photo source

JBL

Boombox 4

Released September 2025

JBL's largest carry-handle Bluetooth speaker, with two woofers, three passive radiators, a 28-hour replaceable battery and IP68 rating, suited to parties indoors and out.

Type
Portable speaker
Atmos
No
Connects by
Bluetooth
Battery
28 h
Weight
5.89 kg

What reviewers say

Reviewers agree it is very loud and powerful with deep, controlled bass, and praise the long-lasting replaceable battery and tough build. The common complaints are its size and weight and a high price; TechRadar heard distortion on some tracks, and Trusted Reviews found the mids slightly recessed with the default tuning.

From trustedreviews.com, soundguys.com and techradar.com

Specifications

Report a wrong or missing spec

Sound

Type
Portable speaker
Dolby Atmos
No
Drivers
Two 123 mm (5 in) woofers, two 20 mm tweeters and three passive radiators (two round, one racetrack); AI Sound Boost
Amplifiers
2 × 65 W RMS woofer + 2 × 40 W RMS tweeter on mains power; 2 × 60 W RMS woofer + 2 × 40 W RMS tweeter on battery
Frequency response
37 Hz – 20 kHz; signal-to-noise ratio over 80 dB
Audio formats
Lossless audio over USB-C from a compatible source
Room tuning
Bass Boost with Deep Bass and Punchy Bass modes

Connections

Wi-Fi
No
Bluetooth
Yes
AirPlay
No
Voice assistants
None
Bluetooth
Bluetooth 5.4; A2DP 1.4, AVRCP 1.6
Ports
AC in; USB-C (audio in and power bank out)
Multi-room
Auracast stereo pairing of two Boombox 4s, and multi-speaker playback with other Auracast JBL speakers

Design

Battery life (maker's claim)
Up to 28 hours
Water and dust resistance
IP68
Weight
5.89 kg
Battery life detail
Up to 28 hours, plus 6 hours with Playtime Boost; replaceable 99.02 Wh (21.6 V, 4,584 mAh) lithium-ion battery pack, sold separately; 3 hours to charge
Controls
Buttons on the top panel, including Bass Boost; the JBL logos on the passive radiators light up when Bass Boost is on
Size
506.4 × 262.9 × 212.9 mm (W × H × D)
Colours
Black, Blue, Squad
In the box
Boombox 4, AC power cord (2 m), quick start guide, safety sheet, warranty card

Pros and cons

Pros

  • Up to 28 hours of battery, or 34 hours with Playtime Boost, and the battery can be replaced
  • IP68 dust and water rating
  • Two Bass Boost modes, lossless audio over USB-C and Auracast

Cons

  • 5.89 kg
  • Bluetooth only, with no Wi-Fi or AirPlay
  • No 3.5 mm input, which the Boombox 3 had

Closest rivals

Model
TypeAtmosConnects byBatteryWeightReleased
SonyULT FIELD 7
Portable speakerNoBluetooth30 h6.3 kgApr 2024
JBLPartyBox Encore 2
Portable speakerNoBluetooth15 h6.4 kgJun 2025
SonyULT FIELD 5
Portable speakerNoBluetooth25 h3.3 kgApr 2025

Sources

  1. jbl.com.sg/bluetooth-portables/BOOMBOX-4.html
  2. uk.jbl.com/on/demandware.static/-/Sites-masterCatalog_Harman/default/dw764254fd…
  3. news.harman.com/releases/jbl-boombox-4-massive-power-iconic-bass-and-a-lighter-…
  4. whathifi.com/speakers/wireless-speakers/jbl-unleashes-revamped-boombox-4-and-li…

Photo: jbl.com.sg

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