Make larger portable sound part of your gathering with the JBL Boombox 4. Dedicated woofers, tweeters and passive radiators work with AI Sound Boost in a battery-powered design for extended listening away from mains power.
Key Features
- AI Sound Boost – optimizes the audio in real time, with Deep Bass and Punchy Bass modes on top.
- Up to 34 hours of playtime – up to 28 hours as standard plus up to 6 more with Playtime Boost, from a 99Wh battery.
- IP68 waterproof and dustproof – handles sand, rain and poolside splashes.
- Built-in power bank – top up your phone from the speaker's battery.
- Auracast – link with other compatible JBL speakers for stereo pairs or multi-speaker setups.
- USB-C with built-in DAC – wired playback, including lossless audio from a compatible source.
Good to Know
Charging takes about 3 hours from the mains. At 5.89 kg it has real heft, so it is happiest carried short distances to where the party is.
Technical Specifications
- Drivers: 2 x 123 mm woofers, 2 x 20 mm tweeters, 3 passive radiators
- Output power (AC): 2 x 65 W woofer + 2 x 40 W tweeter
- Frequency response: 37 Hz – 20 kHz
- Battery: 99.02 Wh Li-ion; up to 34 hours
- Charge time: 3 hours
- Bluetooth: 5.4, Auracast
- Ports: AC in, USB-C
- Water/dust rating: IP68
- Dimensions: 51 x 26 x 21 cm
- Weight: 5.89 kg
What’s Included
- JBL Boombox 4
- AC power cord
- Quick start guide
- Safety sheet
Shipping & Returns
Free UK Delivery – We ship exclusively within the United Kingdom. Orders are processed within 1 business day, with estimated delivery in 5–8 business days after dispatch.
30-Day Returns – Returns are accepted within 30 days of delivery, subject to our Return & Refund Policy.
Customer Support – Monday–Friday, 9 AM–5 PM (UK local time). Business days exclude weekends and UK bank holidays.