JBL Boombox 4 Portable Bluetooth Speaker

The JBL Boombox 4 brings powerful sound wherever the music goes. It is portable, waterproof, and dustproof, with an IP68 rating that helps protect it from dust, spills, splashes, and outdoor conditions. JBL Pro Sound delivers deep, powerful bass, while two **Bass Boost modes** let listeners choose between deeper bass or a tighter, punchier sound. The Boombox 4 also delivers bigger sound than before while being lighter and easier to carry, with up to **34 hours of playtime with JBL Playtime Boost. Inside, JBL has redesigned the speaker system with **two larger woofers, two tweeters, and three passive radiators** to produce fuller bass, clearer details, and more powerful overall sound. AI Sound Boost** analyzes music in real time and automatically adjusts the output, helping the speaker deliver more power with less distortion, even at higher volumes.

The classic boombox design has also been refreshed for the JBL Boombox 4. Although it delivers a bigger sound, the speaker is lighter and easier to carry to the beach, backyard, parties, outdoor gatherings, or anywhere powerful portable audio is needed. With its powerful JBL Pro Sound, adjustable Bass Boost, AI Sound Boost, durable IP68 protection, improved portability, and long battery life, the **JBL Boombox 4** is designed for listeners who want big sound without being tied to one place.

Key Features

• Unbeatable JBL Pro Sound with AI Sound Boost: The JBL Boombox 4 builds on the Boombox 3 with a redesigned speaker system made to deliver bigger, cleaner sound. It uses two larger woofers, two tweeters, and three passive radiators for deeper bass, clearer details, and more powerful overall sound. JBL has also added AI Sound Boost, which analyzes music in real time and automatically adjusts the speaker’s output. This helps maintain strong, clear sound with less distortion, even at higher volumes.
• Up to 34 hours of playtime: The JBL Boombox 4 provides up to 28 hours of playtime on a single charge. JBL Playtime Boost can add up to another 6 hours, extending total playback to as much as 34 hours.
• IP68 waterproof and dustproof protection: The JBL Boombox 4 features an IP68 waterproof and dustproof rating, making it suitable for outdoor use, poolside listening, beach trips, and other environments where water or dust may be present.
• Multi-speaker connection with Auracast™: JBL Auracast™ makes it possible to stereo-pair two Boombox 4 speakers for a wider soundstage or connect multiple Auracast-enabled JBL speakers to play the same music across a larger area.
• Two Bass Boost settings: JBL gives listeners two Bass Boost options. Deep Bass mode adds heavier low-end impact, while Punchy Bass mode delivers a tighter and more energetic bass response. The Bass Boost button on the top panel makes it easy to switch between the two modes.
• Bigger and louder, but lighter: JBL redesigned the Boombox 4 to deliver bigger, more powerful sound while reducing its overall weight, making it easier to carry from one place to another.
• Lossless audio playback: Connect a compatible laptop or audio device through the JBL Boombox 4’s
  USB-C port to enjoy supported lossless audio playback. A compatible lossless audio source, app, or service is required.
• Replaceable battery: JBL designed the Boombox 4 with a replaceable rechargeable battery, helping extend the usable life of the speaker. The replacement battery is sold separately.

 

 

Specifications

Output Power	AC Mode: 2 × 65W RMS Woofer, 2 × 40W RMS Tweeter Battery Mode: 2 × 60W RMS Woofer, 2 × 40W RMS Tweeter
Power Input	100–240V AC, 50/60Hz
Signal-to-Noise Ratio	> 80 dB
Transducers	2 × 5-inch (123mm) Woofers, 2 × 0.75-inch (20mm) Tweeters, 2 × Circular Passive Radiators, 1 × Racetrack Passive Radiator
Frequency Response	37Hz–20kHz
Dimensions	51 × 26 × 21 cm (20 × 10 × 8 inches)
Weight	5.89 kg (13 lbs)
Bluetooth Version	5.4
Bluetooth Profiles	A2DP 1.4, AVRCP 1.6
Bluetooth Frequency Range	2.4 GHz–2.4835 GHz
Bluetooth Modulation	GFSK, π/4 DQPSK, 8DPSK
Bluetooth Transmitter Power	≤ 14 dBm (EIRP)
Connection Ports	AC-in, USB-C
Battery Type	Rechargeable Li-ion Battery Pack, 99.02 Wh
Battery Charge Time	3 Hours
Maximum Playtime	Up to 34 Hours
Cable Type	AC Power Cable
Cable Length	2m (6.6ft)
AI Sound Boost	Yes
Auracast Support	Yes
Powerbank Function	Yes
Waterproof	Yes
Dustproof	Yes
IP Rating	IP68

What’s in the Box?

• 1 × JBL Boombox 4
• 1 × AC Power Cord
• 1 × Quick Start Guide
• 1 × Safety Sheet
• 1 × Warranty Card