Second Chance JBL Boombox 4 Black

Product information

Condition of this Second Chance product

Used for up to 30 days
Returned product in opened original packaging
Complete with undamaged accessories/parts

Pros and cons

According to our Bluetooth speaker expert

You can choose from different bass settings with the Bass Boost for more powerful bass.
Thanks to the fully waterproof design, the speaker doesn’t get damaged by heavy rain.
With the 28-hour battery life, you can listen to music for several afternoons and evenings.
You can only connect this speaker to other speakers that also have Auracast.

Description

Hear every beat clearly with the JBL Boombox 4 Black. This Bluetooth speaker has a Bass Boost button with 2 bass settings. You can choose Deep Bass or Punchy Bass for clear beats or tight bass. The speaker is waterproof, so rain isn't a problem. You can even clean it under the faucet. The combination of 28 hours of battery life and 6 hours of JBL Playtime Boost gives you days of music. This way, you can keep listening longer when the battery is almost empty.

Tips for using this product

This is what you get

Power cord
Quick start guide
Safety Data Sheet
Warranty card

Key specs

	Maximum battery life	28 hours
	Weight	8,16 kg
	Water resistance	Waterproof
	IP certification	IP68
	Water-resistant

Show all specifications

Reviews

Rating

5 stars

4 stars

3 stars

2 stars

1 star

Most helpful reviews

Review is 9,7 out of 10.

A top portable speaker with wonderful bass

Good sound
Deep bass
Tough!
Striking design must appeal to you

Sometimes products are simply good, and this one is no exception. A truly impressive device to behold. With a simple press of the Bluetooth button, it pairs with your phone in seconds. Playing Eefje your favorite playlist is a breeze, and then the party can begin. The music is crystal clear, and the birds, in particular, come through beautifully. Of course, with the first banger, you can already hear the bass rumbling through the room. With the double bass boost function, you can hear it go even lower and deeper. Truly amazing. Personally, I thought the lighting behind the exclamation marks on the subwoofers was a nice touch.

This makes this speaker stand out in both sound and appearance. I can highly recommend it. A fantastic piece of technology that you can carry around in your hand.

Review by:
RoyyoR
Date:
9 December 2025
Translation:
Automatically translated from Dutch

Review is 9,0 out of 10.

Shaking glasses when you turn up the volume

Unprecedented sound
can be used anywhere
bigger than expected

At first, I was a little shocked by the size—it's quite large—but I decided to see what it could do.

And that was a shock too! Because this speaker delivers an unbelievable amount of sound. When you turn on the bass boost, the glasses in the cabinets start to vibrate, without distorting the sound. The bass boost isn't strictly necessary, but it's really nice with some songs.

The size, as mentioned before, is a bit larger than I initially thought, but you eventually get used to it and appreciate it.

It's also fun that the lights dance along with the music.

It's super convenient that it has a fairly large battery, so you can listen to music all day long. Of course, you can also just plug it into the power cord, so you don't have to worry about the battery.

Review by:
Rickert1993
Date:
10 December 2025
Translation:
Automatically translated from Dutch

Review is 8,7 out of 10.

Large but good speaker that you can take with you without an

Great sound
Super battery life
Waterproof
Big

The JBL Boombox really has a good name: it blasts loud sound from the speaker. It's perfect for parties or similar outdoor activities. You can take it with you worry-free because it's waterproof, and enjoy good sound with customizable settings. Want to dance? Extra bass. Create a chill vibe? More clarity. I do think it's a bit big. It would be great if you could get this quality in a more compact design, but it's really convenient for listening to music with groups outdoors.

Review by:
Serianna
Date:
16 December 2025
Translation:
Automatically translated from Dutch

Specifications

Product

Product
	Product number	964852
	Manufacturer code	JBLBOOMBOX4BLKEP
	Brand	JBL
	Warranty	2 years
	Processing of your defect	Via Coolblue

Physical properties

Physical properties
	Speaker type	Bluetooth speaker
	Width	50,64 cm
	Depth	21,29 cm
	Height	26,29 cm
	Weight	8,16 kg
	Color	Black

Power supply

Power supply
	Maximum battery life	28 hours
	Average battery life	28 hours

Water resistance

Water resistance
	Water resistance	Waterproof
	Waterproofness certification	IP certification
	IP certification	IP68

Network and streaming

Network and streaming
	Multi-room audio
	Multi-speaker connectivity technology	Auracast
	Sound reproduction	Stereo

This is the one

Second Chance JBL Boombox 4 Black

Review is 9,4 out of 10, based on 5 reviews.

Returned · Undamaged

Used for up to 30 days
Returned product in opened original packaging
Complete with undamaged accessories/parts

anything for a smile

Ordered before 23:59, delivered tomorrow for free

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Returned · Undamaged

Product information

Condition of this Second Chance product

Pros and cons

Description

Tips for using this product

This is what you get

Key specs

Reviews

Rating

Most helpful reviews

A top portable speaker with wonderful bass

Shaking glasses when you turn up the volume

Large but good speaker that you can take with you without an

Specifications

Product

Physical properties

Power supply

Water resistance

Network and streaming

Related products

This is the one

Returned · Undamaged

Product information

Condition of this Second Chance product

Pros and cons

Description

Tips for using this product

This is what you get

Key specs

Reviews

Rating

Most helpful reviews

A top portable speaker with wonderful bass

Shaking glasses when you turn up the volume

Large but good speaker that you can take with you without an

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