The Ultimate Outdoor Sound Experience – 34-Hour Extreme Battery Life
Key upgrades compared to the previous BOOMBOX 3 ❗
✅ Battery life boosted by 42% (24H → 34H)
✅ Weight reduced by 13% (6.78kg → 5.89kg)
✅ Added dual bass modes (previous model had only one tuning profile)
✅ Industry-first swappable battery design (unlimited outdoor playtime)
✅ Upgraded to 3 passive radiators (previous model had 2)
⭐JBL PRO SOUND: A Breakthrough in Acoustic Performance
• Explosive 6-driver output: Dual 5-inch woofers, dual 0.75-inch tweeters, and three passive radiators deliver precise crossovers and powerful rhythm.
• Dual-mode bass enhancement with one-touch switching:
✦ Deep Mode (Orange indicator): Full output from dual 5-inch woofers and three passive radiators; reaches down to an extreme 37Hz.
✦ Dynamic Mode (White indicator): Precise, punchy rhythm with enhanced mid-to-low frequency layering.
• AI Sound Boost real-time audio optimization: Maintains low distortion even at maximum volume without sacrificing detail or nuance.
• Lossless audio support via USB-C direct connection: Connect to a computer or player to decode high-resolution audio formats like FLAC and ALAC (requires compatible devices).
⭐Ultra-Durable Design
• IP68 Military-Grade Protection: Fully dustproof and capable of withstanding submersion in 1 meter of water for 30 minutes—unfazed by beaches, heavy rain, or spills.
• Lightweight Innovation: Despite an increase in volume compared to the previous generation, the net weight has been reduced to 5.89kg (a 13% reduction), making it easier to lift and carry.
⭐A Revolution in Battery Life and Expandability
• 34-Hour Extended Playtime: 28 hours base + 6 additional hours via Playtime Boost—keep the party going all day and night.
• Swappable Battery: Easily remove the 95.02Wh battery module (sold separately) in three simple steps for instant playback continuity.
• Auracast™ Sound Expansion: Wirelessly link two units for stereo sound or synchronize playback across multiple JBL speakers.
Unrivaled JBL Pro Sound and AI Sound Boost
Experience earth-shaking sound with deep, powerful bass; the redesigned JBL Boombox 4 features two larger woofers, two tweeters, and three passive radiators.
With AI Sound Boost, there’s no need to lift a finger—this smart technology analyzes your music in real-time and optimizes the audio, delivering higher output and reduced distortion even at maximum volume.
Up to 34 hours of playtime
The party vibe never stops… get up to 28 hours of use on a single charge. Forgot to charge up for the next party? No problem. Whether it’s burpees, locking, the moonwalk, or any of your hidden dance moves, JBL Playtime Boost adds up to 6 hours of extra playtime.
Waterproof and Dustproof
The JBL Boombox 4 features an IP68 waterproof and dustproof rating, so it can handle any weather—or the challenges posed by our clumsiest friends.
Connect multiple speakers via Auracast™
Why not share the vibe? With Auracast™, you can easily stereo-pair two Boombox 4 speakers for a wider soundstage, or connect multiple Auracast™-enabled JBL speakers to fill a larger area with the same playlist.
Dual bass boost settings to match the vibe
Fire up the JBL Boombox 4 and experience the classic, signature JBL bass we all love.
Craving deeper bass? Press the bass boost button on the top panel—the JBL Horn logo glows orange, signaling that you’ve entered Deep Bass mode, where both woofers and all three passive radiators kick into full action.
Want a tighter, punchier sound? Tap the button twice; the speaker icon turns white, indicating you’ve switched to “Punchy Bass” mode. Whatever the mood, we’ve got the right bass for it.
Bigger and louder, yet lighter
The JBL Boombox 4 delivers even more massive, outstanding sound—but the real highlight is that we’ve redesigned it to be lighter than ever. Now, it’s easier than ever to take command of your music, wherever you go.
Lossless Audio Playback
Want to hear every detail? Connect your laptop or other audio device to the Boombox 4’s USB-C port* to enjoy lossless audio playback. It is perfect for true audio enthusiasts who want to get more out of their music.
Just ensure your audio source provides lossless audio.
*Requires compatible lossless audio content from a supported app or service.
Recycled plastic and fabric, plus FSC-certified paper packaging
The JBL Boombox 4 features a speaker grille made from post-consumer recycled plastic and recycled fabric. It also comes in FSC-certified paper packaging printed with soy ink.
Replaceable Battery**
Want longer playtime for your speaker? Simply replace the rechargeable battery in three easy steps to restore the JBL Boombox 4 to a full charge.
**Replaceable battery sold separately**
Additional information
General Specifications
．Transducers :
2 x 123 mm woofers
2 x 20 mm tweeters
2 x circular + 1 x arc-shaped passive radiators
．Output power :
(AC mode) : 2 x 65 W RMS woofers + 2 x 40 W RMS tweeters
(Battery mode) : 2 x 60 W RMS woofers, 2 x 40 W RMS tweeters
．Power input : 100 – 240 Vac; 50 / 60 Hz
．Frequency response : 37 Hz – 20 kHz
．Signal-to-noise ratio : > 80 dB
Battery
．Battery type : Rechargeable Li-ion battery pack 99.02Wh (equivalent to 21.6V / 4584 mAh)
．Battery charging time : 3 hours
．Music playtime : Up to 28 hours of playtime, plus an additional 6 hours with the Playtime Boost feature (depending on volume level and audio content)
Connectivity
. Ports : AC-in, USB-C
. Cable type : AC power cable
. Cable length : 2m
．Dimensions (W x H x D) : 506.4 mm x 262.9 mm x 212.9 mm
．Net Weight : 5.89 kg / 13 lbs
What's in the box?
. 1 x JBL Boombox 4
. AC power cord (AC plug and quantity vary by region)
. 1 x Quick Start Guide
. 1 x Safety Sheet
. 1 x Warranty Card
Warranty
1 Year
Door-to-Door Delivery
Orders will be delivered by Vertex or SF Express to industrial, commercial and residential addresses. Delivery areas: Hong Kong ONLY
FREE shipping on orders of HK$3,000 or above; HK$30 will be charged for orders below HK$3,000.
We will arrange shipment in 1-3 working day(s) upon receipt of payment. Please wait for our email/call.
Once the order is shipped out, the shipment will arrive at the shipping address in 1-2 working day(s).
* Deliveries may take longer during busy periods (for example, Christmas, Chinese New Year and Easter). There may also be situations, including but not exclusive to poor weather and traffic conditions, which result in a longer delivery.
* For more details on delivery, please visit FAQs.
Pickup – SF Store/Locker
FREE shipping on orders of HK$3,000 or above; HK$30 will be charged for orders below HK$3,000.
During checkout, please select SF Store/Locker as a pickup location, and specify code & address under “Order Notes”.
We will arrange shipment in 1-3 working day(s) upon receipt of payment.
