The JBL Boombox 4 is a high-end portable Bluetooth speaker designed for powerful outdoor and party use. It delivers JBL Pro Sound with deeper bass and louder output than previous models, thanks to upgraded internal drivers and AI-powered sound tuning. It features AI Sound Boost, which automatically analyzes music in real time to optimize volume and clarity while reducing distortion—even at high levels. The speaker is built for durability with an IP68 waterproof and dustproof rating, making it suitable for beach, pool, and outdoor environments. With up to 34 hours of playtime (with Playtime Boost), multi-speaker connectivity via Auracast, and a built-in power bank, the Boombox 4 is designed to keep music going all day and night.