Coolblue.Anything for a smile

Our goal is to make you completely happy. That's why we have our own delivery network, bike delivery drivers, installers, and stores. For over 20 years, we've made customers smile in the Netherlands, Belgium, and Germany.

Get to know us better
Coolblue employee

Hi Germany

Coolblue has been active in the Netherlands, Belgium, and Germany for over 20 years.

Coolblue employee
Ordered before 23:59, delivered tomorrow for free
Ordered before 23:59, delivered tomorrow for free
Free exchange
5 stores
Our app
Trustpilot customer rating 4,5/5
Ordered before 23:59, delivered tomorrow for free
Ordered before 23:59, delivered tomorrow for free
Free exchange
5 stores
Our app
Trustpilot customer rating 4,5/5
BusinessStoresAbout Coolblue
Customer service

0211 819 735 55

Wireless speakers

Ultimate Ears BOOM 4 Black

Choose your speaker:

Black

Color: Black

Charger not included

Retail price€ 199,99
€ 103,99
Affordable Second Chance

from

€ 89,-

In stock

Check if we deliver to you
Ordered before 23:59, delivered tomorrow for free
2 years warranty on your product
Free exchange within 30 days
Customers rate Coolblue 4.5/5
Active in the Netherlands since 1999
Buy now, pay later, or finance

Product information

Pros and cons

According to our Bluetooth speaker expert

  • You hear music from every side of the speaker thanks to the 360-degree sound.
  • The speaker is dustproof and water-resistant with a design that floats, so you can easily take the speaker outside.
  • With the 15-hour battery life, you can listen to music all day long.
  • You can't charge your smartphone to the speaker, because it doesn't have a power bank.

Description

You can easily take the Ultimate Ears BOOM 4 Black with you to enjoy your favorite music anywhere. The speaker provides 360-degree sound, so you can hear sound on every side of the speaker. This way, it doesn't matter where you sit to clearly hear the music. You can also use the speaker outdoors thanks to its dustproof and water-resistance with IP67 certification. For example, on the beach or by the pool. The design of the speaker allows it to float if it accidentally falls into the water. The 15-hour battery life lets you listen to music all day. You can also hold your smartphone up to 45m away from the speaker. This gives you plenty of freedom of movement. With PartyUp, you can pair other Ultimate Ears speakers for a more powerful sound.

Tips for using this product

Included by default

  • USB-C charging cable

Key specs

Maximum battery life

15 hours

Weight

0,62 kg

Wireless speaker size

Compact (10 - 20cm)

Water resistance

Waterproof

IP certification

IP67

Built-in WiFi

Controls via app

Water-resistant

Show all specifications

Similar and better products

    • Current product

      Ultimate Ears BOOM 4 Black

    •  

      House of Marley Roots Solar Black

    •  

      Bose SoundLink Flex 2nd Gen Blue

    •  

      Bose SoundLink Flex 2nd Gen Pink

    •  

      JBL Flip 7 Black
      • Retail price€ 199,99
        € 103,99
      • € 129,99
      • Retail price€ 179,95
        € 119,-
      • Retail price€ 179,95
        € 119,-
      • Retail price€ 149,-
        € 129,-
    • Sound reproduction

      • 360 degrees, Stereo

      • Mono

      • Stereo, Surround

      • Stereo, Surround

      • Mono

    • Maximum battery life

      • 15 hours

      • 14 hours

      • 12 hours

      • 12 hours

      • 14 hours

    Show full comparison

    Reviews

    Rating

    • 5 stars

      1

    • 4 stars

      2

    • 3 stars

      0

    • 2 stars

      0

    • 1 star

      0

    Most helpful reviews

    7,0/10 ()

    Good speaker if you don't need to use a hotspot.

    • Handy that it stands upright
    • Nice full sound
    • Battery can last a very long time
    • Very annoying with hotspot
    After 11 years of the EU boom (1st generation) it was time for an upgrade. The new boom 4. First impression: it is a lot bigger and the build quality looks less solid. Cheaper finish. Sound is good. Fuller and more detailed than the 1st generation. But when you turn on the hotspot on your phone, the trouble starts. Then the boom 4 interferes like crazy. Very annoying. The 1st generation boom and all our other headphones and speakers do not do this. Very unfortunate. We are sending it back, because we use the speaker when we work outside the home.

    • Sytze

    • 24 November 2024

    • Automatic translation off Nederlands

    Insure your Bluetooth speaker

    • Coolblue takes care of everything, from taking out an insurance to repairs

    • For almost all accidents

    • More coverage in case of damage than your standard warranty

    • No deductible

    How do I insure my Bluetooth speaker?

    First, add your Bluetooth speaker to your shopping cart. On the next page, choose the Protection Plan below. You always have a 30-day return window and pay no deductible in case of damage.

    • 2-year XCover Protection without theft cover

      € 1,99one-time

    • 3-year XCover Protection without theft cover

      € 3,99one-time
    Read more about insurance
    Ultimate Ears BOOM 4 Black

    Suitable accessories

    Specifications

    Product

    Product number

    		950591

    Manufacturer code

    		984-001969

    Brand

    		Ultimate Ears

    Warranty

    		2 years

    Processing of your defect

    		Carry-in warranty

    Physical properties

    Speaker type

    		Bluetooth speaker, Wireless speaker

    Width

    		7,3 cm

    Depth

    		7,3 cm

    Height

    		18,4 cm

    Wireless speaker size

    		Compact (10 - 20cm)

    Weight

    		0,62 kg

    Color

    		Black

    Integrated light effects

    Built-in microphone

    Power supply

    Maximum battery life

    		15 hours

    Integrated power bank

    Water resistance

    Water resistance

    		Waterproof

    Waterproofness certification

    		IP certification

    IP certification

    		IP67

    Network and streaming

    Bluetooth

    Built-in WiFi

    NFC

    Multi-room audio

    Plays from network

    Radio

    Multi-speaker connectivity technology

    		UE PartyUp

    Headphone jack

    Sound reproduction

    		360 degrees, Stereo

    Controls

    Controls via app

    Controlled via buttons on device

    Remote control

    Durability

    Quality mark sustainable product

    		FSC certified packaging material

    Product contributes to sustainability

    		This product helps you separate trash

    Green production features

    		Partly made of recycled material

    anything for a smile

    Ordered before 23:59, delivered tomorrow for free
    Ordered before 23:59, delivered tomorrow for free
    5 stores
    Our app
    Trustpilot customer rating 4,5/5