JBL is rolling out two new heavy-hitters this September: the JBL Boombox 4, a lighter yet more powerful take on its iconic portable speaker, and the JBL PartyBox 720, a feature-packed party system with enough wattage to make the neighbors call the cops, or join in. Both bring fresh updates to JBL’s Pro Sound lineup, aiming squarely at gatherings big and small.
The pair arrive on the heels of the brand’s new portable speaker, The Grip, which was announced just yesterday.
Boombox 4: Lighter, Louder, and Bass-ier
The JBL Boombox 4 dials up the output with 50% more power on battery compared to the previous model, while trimming nearly two pounds off its weight. Portability meets punch here, making it easier to haul to the park, beach, or anywhere friends gather.
The new AI Sound Boost tech intelligently adjusts drivers to crank up volume without distortion, while Bass Boost offers two modes, Deep Bass for richness and Punchy Bass for livelier tracks. White or orange LED-lit JBL logos pulse in sync when Bass Boost is active, turning the speaker into a glowing reminder that yes, the bass is on.
A sturdier foot design, IP68 water and dust protection, and Auracast support make the Boombox 4 ready for serious social duty. Users can pair it seamlessly with other JBL speakers or go wired with USB-C lossless audio. Battery life reaches up to 28 hours, and the replaceable battery option extends its lifespan.
The Boombox 4 is offered in Black, Blue, or Squad camo finishes and is available now for pre-order at $549.95, with wide release set for September 28, 2025.
PartyBox 720: Bigger Sound, Brighter Lights
If the Boombox is for the beach, the PartyBox 720 is for the block party. Delivering 800W RMS through dual 9-inch woofers and dome tweeters, this is JBL’s most powerful battery-powered party speaker to date. AI Sound Boost optimizes output in real time, ensuring clarity even at max volume.
The PartyBox 720 doubles as a lightshow with starry and strobe effects synced to your music. Customization is handled through the JBL PartyBox app, letting hosts fine-tune both sound and visuals to fit the mood. Connectivity includes Auracast for multi-speaker setups and two XLR inputs for plugging in a mic, guitar, or DJ rig.
Mobility has been addressed with wider wheels and an ergonomic handle, making it easier to roll from one room (or yard) to another. The system runs up to 15 hours on its dual replaceable batteries, and Fast Charging adds two extra hours from just 10 minutes of juice.
The JBL PartyBox 720 is available for pre-sale now at $1,099, with general availability beginning September 21, 2025.
Availability
Both speakers reflect JBL’s long-running focus on bass-heavy, high-energy audio experiences tailored to real-world use. More details and pre-orders can be found at JBL.com.
