Turn Up the Energy with the Most Powerful Boombox Yet. The JBL Boombox 4 takes the iconic party starter to the next level. Featuring a redesigned 2-way speaker system with AI Sound Boost, it delivers deeper bass and cleaner highs even at maximum volume. With an industry-leading 34 hours of total playtime and a swappable battery pack, the music never has to stop. It’s lighter, louder, and built for the elements with a rugged IP68 waterproof and dustproof rating.
Intelligent Audio with AI Sound Boost
The JBL Boombox 4 isn’t just louder; it’s smarter. Our exclusive AI Sound Boost technology analyzes the incoming audio signal in real-time, predicting driver movement and power response. This allows the speaker to push the drivers to their absolute limit, delivering a wider dynamic range and deeper, harder-hitting bass without the risk of distortion. Whether you’re at a backyard BBQ or a beach party in Kampala, your music stays crystal clear.
When it comes to bass, you now have options. The Boombox 4 features a Dual Bass Boost system. Tap the button once for Deep Bass Mode—perfect for open outdoor spaces where you want to feel the rumble in your chest. Tap it twice for Punchy Bass Mode, offering a tighter, more energetic low-end ideal for indoor dance floors. With two 5-inch woofers and three passive radiators, every beat is a physical experience.
Never worry about a dead battery again. The Boombox 4 offers a massive 28 hours of playtime, which jumps to 34 hours when you engage Playtime Boost. But the real game-changer is the replaceable battery. Instead of retiring your speaker when the battery ages, you can simply swap it out for a new one, ensuring your Boombox 4 stays in peak performance for years to come.
Built for the Elements & Beyond
From sudden tropical downpours to dusty desert adventures, the IP68 rating means this speaker is completely dustproof and waterproof. It can even be submerged in up to 1.5 meters of water for 30 minutes. Plus, we’ve redesigned the internal chassis to be nearly 1kg lighter than the previous generation, making it the most portable “big” speaker in the world.
Lossless Audio & Modern Connectivity
For the audiophiles, the Boombox 4 introduces Lossless Audio Playback via USB-C. Simply plug in your laptop or high-res player to experience studio-grade fidelity that standard Bluetooth can’t reach. When it’s time to scale up, use Auracast™ to sync your speaker with any other Auracast-enabled JBL speaker for a massive, synchronized soundstage.
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