The JBL Boombox 4 Portable Bluetooth Speaker is designed for audiophiles, party hosts, and music lovers who refuse to compromise on audio performance, clarity, or durability. Engineeered to deliver stadium-filling acoustic output in a highly portable chassis, the Boombox 4 sets a brand-new standard for high-performance mobile sound. Available at duuka.ug in striking Rechargeable Black and vibrant Blue finishes, this flagship speaker combines refined aesthetic craftsmanship with heavy-duty outdoor structural design.
Whether you are organizing a large outdoor celebration, hosting an indoor acoustic gathering, powering up a weekend beach retreat, or setting up sound for outdoor sports, the JBL Boombox 4 delivers massive soundstage depth. Its advanced internal acoustics reproduce music with breathtaking fidelity—capturing the lowest sub-bass rumbles alongside crisp mid-range vocals and sparkling high frequencies.
High-Output Driver Architecture & 210W RMS Power
At the core of the JBL Boombox 4 is a redesigned acoustic engine featuring a multi-transducer configuration optimized for raw acoustic efficiency and acoustic throw. Built with two massive 5-inch (123mm) high-excursion woofers and two dedicated 0.75-inch (20mm) soft-dome tweeters , the speaker generates a balanced audio landscape across the audible spectrum. To complement these active drivers, JBL has integrated three passive radiators —two circular radiators mounted on the flanks and one specialized racetrack-shaped radiator. This tri-radiator design drastically increases air displacement, giving bass hits visceral impact.
Power output on the JBL Boombox 4 is higher than ever. When plugged into AC wall power, the speaker unleashes a total dynamic output of 210W RMS (split into 2x 65W RMS for the woofers and 2x 40W RMS for the tweeters). Even when running strictly on its internal rechargeable battery pack, the Boombox 4 generates an astonishing 200W RMS total output (2x 60W RMS woofers + 2x 40W RMS tweeters). This near-zero performance drop when operating on battery power ensures that your sound remains uncompromised wherever your music takes you.
AI Sound Boost & Dual Bass Boost Settings
To maximize acoustic output without acoustic clipping or harmonic distortion, the Boombox 4 incorporates JBL’s proprietary AI Sound Boost technology . This intelligent audio engine analyzes the incoming sound signal in real time, predicting physical driver movement and power limits. By dynamically controlling the speaker's response, AI Sound Boost pushes the woofers and tweeters to their absolute physical limits while dramatically reducing distortion at maximum volume levels.
Furthermore, the Boombox 4 introduces Dual Bass Boost Profiles so you can adapt your audio profile to match your mood or environment. With a single touch, switch between Deep Bass Mode —which extends low-frequency response down to 37 Hz for rich soundscapes—and Punchy Bass Mode , which tightens the low-end frequencies for rapid, energetic, beat-driven dance music. The iconic side-firing bass radiator rings feature illuminated LED horn logos that glow to provide immediate visual confirmation when Bass Boost is engaged.
Extreme Outdoor Durability: Certified IP68 Dustproof & Waterproof
Built to endure severe outdoor conditions, the JBL Boombox 4 holds an official IP68 ingress protection rating . This rating ensures complete protection against dust, dirt, sand, and fine atmospheric particles. Furthermore, the speaker is fully waterproof and capable of withstanding immersion in fresh water, making it a reliable companion for poolside events, rainstorms, camping trips, and sandy beaches.
The chassis is engineered using post-consumer recycled plastics, heavy-duty rubberized end-caps, shock-absorbent bumpers, and a reinforced woven fabric grille. Designed to absorb everyday bumps, drops, and impacts, the speaker retains a comfortable, ergonomically contoured top handle that makes transport simple despite its massive power output.
All-Day Battery Life, Playtime Boost & Swappable Battery Architecture
Keep the energy flowing without constant concern for power outlets. The JBL Boombox 4 is equipped with a high-density 99.02Wh rechargeable Lithium-ion battery pack (21.6V / 4584 mAh) that delivers up to 28 hours of continuous wireless music playback on a standard charge. When you need extended performance, activate Playtime Boost in the companion app to add up to 6 additional hours of operation—yielding a total potential playtime of up to 34 hours .
When it comes time to recharge, the Boombox 4 features a fast internal charging circuit that restores the battery from 0% to 100% in just 3 hours via the included AC power cord. In addition, the Boombox 4 features a replaceable battery mechanism , allowing users to easily swap out the internal battery module after years of heavy use or swap in a fresh spare during multi-day off-grid events.
USB-C Audio, Powerbank Capabilities & Auracast™ Multi-Speaker Pairing
Beyond wireless Bluetooth 5.4 streaming, the Boombox 4 offers physical digital connectivity. Plugging a compatible smartphone, tablet, or laptop into the dedicated USB-C port unlocks direct digital lossless audio playback , bypassing wireless audio compression codecs for uncompromised fidelity. The same high-capacity battery doubles as a built-in USB powerbank , allowing you to charge external mobile devices via USB-C while streaming music.
For large venues or outdoor spaces, the Boombox 4 features next-generation Auracast™ multi-speaker pairing . With Auracast™, you can pair two Boombox 4 units to establish a true Left/Right stereo configuration or wirelessly link an unlimited number of Auracast-enabled JBL speakers to create a unified audio network across wide areas. Complete control over Equalizer curves, software updates, lighting effects, and speaker grouping is accessible via the free JBL Portable App on iOS and Android.
Technical Specifications Datasheet
Product Model: JBL Boombox 4 Portable Bluetooth Speaker
Color Finishes: Rechargeable Black, Blue, Squad Camouflage
Active Transducers: 2 x 5.0-inch (123mm) Woofers, 2 x 0.75-inch (20mm) Tweeters
Passive Radiators: 3 x Passive Radiators (2 Circular Side Radiators + 1 Racetrack Radiator)
Total Output Power (AC Wall Mode): 210W RMS (2 x 65W Woofer + 2 x 40W Tweeter)
Total Output Power (Battery Mode): 200W RMS (2 x 60W Woofer + 2 x 40W Tweeter)
Frequency Response Range: 37 Hz – 20,000 Hz
Signal-to-Noise Ratio (SNR): > 80 dB
Bluetooth Version & Range: Bluetooth 5.4 (2.4 GHz – 2.4835 GHz)
Bluetooth Wireless Profiles: A2DP 1.4, AVRCP 1.6
Ingress Protection Rating: IP68 Dustproof and Waterproof (Submersible)
Battery Chemistry & Capacity: Rechargeable Li-ion 99.02 Wh (Equivalent to 21.6V / 4584 mAh)
Battery Playtime: Up to 28 Hours (Up to 34 Hours with Playtime Boost)
Battery Recharge Time: 3.0 Hours (0 to 100% via direct AC input cable)
Physical Connections: AC Power Input, USB-C (Audio Input & Powerbank Output)
Multi-Speaker Technology: Auracast™ Multi-Speaker Sync & True Stereo Pairing
App Control & Tuning: JBL Portable App (Custom EQ, Dual Bass Boost, Firmware Updates)
Physical Dimensions (W x H x D): 506.4 mm x 262.9 mm x 212.9 mm (19.9" x 10.4" x 8.4")
Net Unit Weight: 5.89 kg (12.99 lbs)
