Overview of JBL Boombox 4 Portable Bluetooth Speaker
The JBL Boombox 4 takes portable party sound to the next level with a redesigned, lighter chassis, increased acoustic output, and modern wireless connectivity.
Monstrous 210W JBL Original Pro Sound
Engineered with dual 5-inch woofers, dual 0.75-inch tweeters, and three passive radiators, the Boombox 4 delivers up to 210W RMS on AC power and nearly 200W on battery mode. With a frequency range spanning 37Hz to 20kHz, it produces wall-shaking bass and pristine vocal clarity.
AI Sound Boost with Dual Bass Modes
Integrated AI Sound Boost dynamically analyzes incoming audio in real time, driving drivers to their mechanical limits while eliminating high-volume distortion. Easily toggle between Deep Bass mode for expansive low rumble and Punchy Bass mode for fast, hard-hitting rhythmic beats.
Maximum IP68 Dustproof & Waterproof Protection
Featuring a rugged IP68 rating, this speaker is completely sealed against fine sand, dirt, and full water immersion, making it the ideal centerpiece for poolside gatherings, beach trips, and outdoor adventures.
Up to 34-Hour Battery Life & Auracast™ Multi-Speaker Pairing
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Extended Playtime: Enjoy up to 28 hours of continuous audio, extended to 34 hours using Playtime Boost.
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Swappable Battery Design: Replaceable battery pack system allows effortless swaps for uninterrupted all-day listening.
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Auracast™ Broadcast Pairing: Seamlessly pair two units for true stereo separation or broadcast audio across dozens of compatible JBL speakers.
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Versatile USB-C Port: Delivers lossless wired audio playback directly from devices and functions as a power bank to recharge smartphones on the go.