JBL has long dominated the portable speaker scene with its Boombox lineup, and the new Boombox 4, which debuted in China and is expected to roll out globally soon, pushes the series forward with more power, smarter sound processing, and an eco-friendlier build. But how much of an upgrade is it over the still-popular Boombox 3? Here’s a closer look at how the two compare.
1. Design and Build
The Boombox 3 introduced a bold refresh to the series, keeping the iconic silhouette while adding a sturdy metal handle with silicone grips and side caps. It weighed 6.7 kg, making it hefty but still portable for its size. Its IP67 rating meant protection against dust and water, good enough for poolside parties or beach outings.
The Boombox 4 takes that formula and trims it down. At 5.89 kg, it’s 12 percent lighter despite being slightly larger, which makes it easier to carry around. JBL has also given it an IP68 rating, which means it can handle deeper water immersion and better dust protection. The body is made with recycled materials and eco-friendly packaging, giving it a sustainability edge. It retains the rugged, oversized speaker look but feels more practical in day-to-day use.
2. Audio Performance
The Boombox 3 delivered massive JBL Original Pro Sound with a three-way speaker system: a subwoofer, midrange drivers, and tweeters. On AC power, it pumped out 80W + 2x40W + 2x10W RMS, while battery mode scaled it back slightly. Its sound signature leaned heavily on thumping bass, which JBL fans love, though at times mids could feel overshadowed.
The Boombox 4 steps up significantly with a seven-driver setup: dual 5-inch woofers, dual 0.75-inch tweeters, and three passive radiators. The output jumps to 210W RMS on AC power and 180W on battery, making it the most powerful Boombox yet. Bass response is deeper and tighter thanks to AI Sound Boost, a real-time algorithm that balances dynamics and reduces distortion. Add in the two-level Bass Boost mode, and it’s clear JBL wants this to be a true outdoor party beast.
3. Connectivity and Features
Both speakers come with Bluetooth streaming, PartyBoost pairing, and power bank functionality. The Boombox 3 runs on Bluetooth 5.3, which is stable and efficient, and it supports JBL PartyBoost, letting you link it with other PartyBoost-enabled speakers for stereo or multi-speaker setups.
The Boombox 4 builds on this with Bluetooth 5.4 and adds Auracast support, a more open and reliable standard for linking multiple speakers. That means you still get PartyBoost compatibility, but now you also have a future-ready option that can create larger, more stable multi-speaker systems with fewer connection drops.
It also introduces USB-C lossless audio playback with a built-in DAC, something the Boombox 3 lacks, making it friendlier for high-resolution playback from PCs and other digital sources. Both models integrate with the JBL Portable app, but the Boombox 4 offers more refined EQ adjustments and smoother stereo/multi-speaker management.
4. Battery Life and Charging
Battery performance has always been a highlight for the Boombox series. The Boombox 3 promised 24 hours of playback on a single charge, with a 6.5-hour recharge time.
The Boombox 4 pushes this further, packing a 99Wh battery rated for 28 hours of use, extendable to 34 hours with Playtime Boost mode. It also doubles as a 30W power bank with PPS fast charging (20V/1.5A), making it more versatile for powering smartphones or tablets on the go. Charging is also handled through USB-C, which aligns better with today’s standard devices.
5. Verdict
The JBL Boombox 3 remains a powerhouse portable speaker with a proven track record of durability and bass-heavy sound. Priced at $499.95 in the US, it offers strong value for those who want big audio performance without stepping into the next tier.
The Boombox 4, meanwhile, refines nearly every aspect: it’s lighter, tougher with IP68 protection, smarter with AI-driven sound, more versatile with USB-C lossless playback, and longer-lasting with a 99Wh battery. At 3999 yuan (around $557), it comes at a premium, but it feels justified for anyone who wants JBL’s biggest portable speaker to date without compromise.
In short, the Boombox 3 makes sense for buyers looking for proven performance at a slightly lower price, while the Boombox 4 is the more future-ready option once it rolls out globally.
In related featured articles, we recently covered the best upcoming camera-focused smartphones of 2025 and reviewed the Vivo V60, a phone known for its camera, durable build, and long battery life.
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