JBL Boombox 4: Massive Power, Iconic Bass, and a Lighter Build

Boombox is back with a bang, now featuring 50% more power and Bass Boost

STAMFORD, Conn.--(BUSINESS WIRE)--JBL is turning up the volume once again with the launch of JBL Boombox 4. Built to shake rooms, fuel gatherings, and unite people through powerful sound, this is not just a speaker, it’s JBL in its purest form: foot-thumping bass powered by cutting-edge tech.

More Power – Less Distortion

Boombox 4 features JBL’s AI Sound Boost, an intelligent audio enhancement that enables the drivers to push harder and hit louder, while staying crystal clear. The result? That legendary JBL Pro Sound: refined, clean highs, booming lows, and room-filling energy at every volume.

Louder and Lighter

With more portable power than ever before, Boombox 4 is nearly 2lbs lighter than its predecessor, making it easier to carry, pack, and take anywhere the party goes. But don’t let the lighter build fool you, this speaker delivers 50% more power output when used on battery. Less weight. More punch.

Now you can both hear and see the bass: the JBL logos glow white or orange when Bass Boost is on. Choose between Deep Bass or Punchy Bass modes and let the speaker handle the rest.

This take-it-anywhere speaker is built to bring people together. The robust new design has a sturdier foot and is IP68 water and dustproof, in accordance with product instructions, meaning it’s ready for the pool, the park, the beach, or wherever your crew gathers. Plus, with Auracast™ built in, you can instantly link it with other compatible JBL speakers for even bigger sound.

“The market is moving towards more bass-heavy portable speakers – and JBL wrote the master class on bass,” said Carsten Olesen, President of Consumer Audio at HARMAN. “Striking a balance between powerful bass and high-quality audio is a difficult art to master, but with the introduction of proprietary technologies like Bass Boost and AI Sound Boost, JBL Boombox 4 does exactly that. It’s everything fans love about JBL.”

Launching in bold Black, Blue, or rugged Squad, this is a speaker that matches your energy and your style. Available for pre-sale now on JBL.com for $549.95, with a wide release on September 28, 2025.

What you need to know:

• AI Sound Boost: Intelligent audio processing for more power and less distortion
• Bass Boost is back – now with two custom modes. Deep Bass delivers a full, rich bass performance, while Punchy Bass offers tighter, energetic bass to fit more upbeat tracks
• LED-lit horn logos on bass radiators pulse when Bass Boost is active
• Almost 50% more output power when used on battery compared to JBL Boombox 3
• New audio construction: A third passive radiator has been added with two new mid-range drivers replacing the subwoofer
• USB-C lossless audio for wired digital listening
• 13lbs makes it a 12% lighter design compared to JBL Boombox 3
• Up to 28 hours of battery, up to 34 hours with Playtime Boost and now with a replaceable battery
• Auracast™ for seamless multi-speaker or stereo pairing
• IP68 waterproof and dustproof

About JBL
For over 75 years, JBL has shaped life’s most memorable moments at the intersection of music, lifestyle, gaming and sports. JBL elevates listening experiences with superior audio quality and product designs that encourage individuality and self-expression. With unmatched professional credentials and industry-leading innovation, JBL is a trailblazer in the audio industry because of passionate and talented engineers and designers around the globe. JBL Pro Sound is the foremost technology pushing culture forward through major pop culture events and partnerships with the world’s top talent across music, sports and esports.