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The JBL Boombox 4 is a large portable Bluetooth speaker built for loud, bass-heavy sound indoors and out. It adds AI Sound Boost, two bigger woofers, two tweeters, and three passive radiators over the Boombox 3, plus IP68 dust and water protection and up to 34 hours of playtime with Playtime Boost. Two Bass Boost modes let you pick deep or punchy low end. It suits backyard parties, beach trips, and anyone who wants room-filling sound from a battery speaker, though its size and weight make it less portable than smaller rivals.
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Owners and reviewers praise the Boombox 4 for its loud, clean sound and deep bass, and they value the IP68 rating and long battery life. Common complaints focus on its size and weight, which make it less portable than smaller speakers, and some note that the bass-forward sound can overwhelm certain genres.
The JBL Boombox 4 is a portable Bluetooth speaker with JBL Pro Sound and deep bass. It has two woofers, two tweeters and three passive radiators.
AI Sound Boost analyzes the music in real time and adjusts the sound to give more power with less distortion at high volume. Two Bass Boost settings, deep and vibrant punchy, let the listener change the bass character.
The design is larger than the classic Boombox but lighter. It is IP68 waterproof and dustproof. Playtime Boost gives up to 34 hours of playtime.
