JBL Boombox 4

Description

JBL Boombox 4 in Kenya

The JBL Boombox 4 stands as the absolute pinnacle of high-output, portable Bluetooth loudspeaker performance. Re-engineered from the inside out, the Boombox 4 expands the boundaries of outdoor party sound by merging brutal power, fine acoustic precision, real-time AI audio processing, and extreme structural durability.

Whether providing the soundtrack for outdoor festivals, powering backyards, or providing studio-grade monitoring in remote locations, the Boombox 4 delivers signature JBL Original Pro Sound without compromise.

Key Technical Specifications

Feature	Technical Specification
Acoustic Transducers	2 x 5″ (123mm) Woofers, 2 x 0.75″ (20mm) Tweeters, 3 x Passive Radiators
Total Power Output (AC)	210W RMS Total (2 x 65W Woofer + 2 x 40W Tweeter)
Total Power Output (Battery)	180W RMS Total (2 x 60W Woofer + 2 x 40W Tweeter)
Frequency Response	37 Hz – 20,000 Hz
Signal-to-Noise Ratio	> 80 dB
Wireless Connectivity	Bluetooth 5.4 with Auracast™ support
Wired Inputs / Playback	USB-C (Supports Lossless Audio Playback) & AC Power In
Ingress Protection Rating	IP68 (Dustproof and Fully Submersible Water Protection)
Playtime Duration	Up to 28 Hours standard (Up to 34 Hours with Playtime Boost)
Battery Type & Capacity	99.02 Wh Li-ion Rechargeable (User-Replaceable design)
Charge Time	~3 Hours via AC Fast Charging Cable
Dimensions (W x H x D)	51.0 x 26.0 x 21.0 cm (20.0 x 10.0 x 8.0 inches)
Net Weight	5.89 kg (13.0 lbs)

Revolutionary Audio Architecture &  Sound Boost

At the core of the JBL Boombox 4 is a redesigned 7-driver acoustic package driven by an ultra-efficient Class-D amplifier array. The speaker incorporates larger 5-inch dual subwoofers and dual high-frequency 0.75-inch silk dome tweeters, supplemented by three custom-tuned passive radiators (two side-firing circular radiators and one central racetrack radiator) to extend bass response down to an impressive 37 Hz.

The Boombox 4 introduces JBL’s proprietary  Sound Boost technology. Rather than relying on static equalizer presets, an onboard Digital Signal Processor (DSP) uses artificial intelligence algorithms to analyze the incoming audio waveform in real time. It predicts driver excursion limits and thermal thresholds, dynamically optimizing the output power. This allows the Boombox 4 to hit higher volumes with significantly reduced harmonic distortion, ensuring that low frequencies remain punchy and highs stay crystal clear even at maximum acoustic output.

Dual-Mode Hardware Bass Tuning

Listeners can instant-customize their sound profiles directly via a dedicated top-panel control button:

• Deep Bass Mode (Horn Icon Orange Glow): Tunes the passive radiators and woofers to hit low frequencies, ideal for Hip-Hop, Electronic Dance Music, and cinema audio.

• Punchy Bass Mode (Horn Icon White Glow): Tightens the low-end transients, delivering fast, punchy bass suited for Rock, Pop, and live acoustic performances.

Structural Design & IP68 Weather Resistance

Despite offering higher RMS power wattage than its predecessors, the Boombox 4 features a redesigned chassis that makes it lighter and more portable at just 5.89 kg.

• IP68 Ingress Rating: Upgraded to IP68 rating, making the unit completely dust-tight and capable of surviving complete submersion in up to 1.5 meters of water for 30 minutes.

• Ergonomic Metal Handle: Features a contoured metal carry handle integrated into the structural spine, lined with anti-slip silicone texturing for comfortable, fatigue-free transport.

• Eco-Friendly Construction: Built using sustainable engineering principles, incorporating PCR (Post-Consumer Recycled) plastics and 100% recycled fabric mesh for the outer grille, shipped in FSC-certified soy-ink packaging.

Extended Battery Life & Power Bank Capability

Engineered for extended operations, the JBL Boombox 4 eliminates power anxiety with a internal 99.02 Wh rechargeable Lithium-ion battery pack.

1. 28-Hour Native Playtime: Delivers up to 28 hours of continuous audio playback on a single charge at moderate listening levels.

2. Playtime Boost Mode: Activating Playtime Boost via the JBL One App optimizes power consumption, adding up to 6 extra hours of runtime by fine-tuning the dynamic range.

3. Internal Power Bank: Includes a bi-directional USB-C port that doubles as a high-speed power bank, letting users charge smartphones, tablets, or action cameras directly from the speaker without interrupting music playback.

4. User-Replaceable Battery Design: Built with long-term serviceability in mind, allowing users to swap out the internal battery pack in simple steps to double continuous playtime or extend the speaker’s total lifespan.

Modern Wireless & Lossless Connectivity

The JBL Boombox 4 integrates the latest standard in wireless audio streaming alongside high-resolution wired capabilities:

• Bluetooth 5.4 Integration: Operates over Bluetooth v5.4 with enhanced range, lower power consumption, and minimal latency.

• Auracast™ Broadcasting: Replaces legacy pairing technologies with universal Auracast™ support. Pressing the dedicated Auracast™ button links an unlimited network of Auracast-enabled JBL or third-party speakers for synchronized multi-room or multi-speaker sound stages.

• Stereo Pairing: Pair two Boombox 4 units using the JBL One App to configure a true Discrete Left/Right stereo pair for wider spatial sound separation.

• USB-C Lossless Audio Input: Audiophiles can bypass Bluetooth compression by connecting laptops, DACs, or compatible mobile devices directly via the USB-C port for true lossless digital audio playback.

Full Control via the JBL One App

The JBL One App (available on iOS and Android) unlocks complete software customization for the Boombox 4:

• Customizable EQ: Adjust 3-band Equalizer settings (Bass, Mid, Treble) or select optimized audio profiles.

• Firmware Management: Receive over-the-air (OTA) updates to continuously refine DSP algorithms and feature integration.

• Auracast Management: Group, assign, and manage multi-speaker setups visually from a single mobile dashboard.