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Ultimate Ears BOOM 4 Portable Bluetooth Speaker - Cobalt Blue (984-001979)

Ultimate Ears BOOM 4 Portable Bluetooth Speaker - Cobalt Blue (984-001979)

$278

Ultimate Ears BOOM 4 Portable Bluetooth Speaker - Cobalt Blue (984-001979)

6235638
Ultimate Ears BOOM 4 Portable Bluetooth Speaker - Blue
$278
$11.58^ approximately

This section should always be read in conjunction with the Terms and Conditions for Product CareTM.

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Available on 24 months of equal Interest Free instalments:

approximately per month

^ Total repayments $278 (excluding fees). Min purchase of $250 applies. Offer ends . Equal monthly payments required. Lending criteria, T&Cs & fees apply incl. a $55 estb. fee & $65 annual fee ($32.50 half yearly). Standard interest rate (currently 29.49% p.a.) applies after interest free term ends. Exclusions may apply. *Further information on rates and fees can be found at gemfinance.co.nz. Credit provided by Latitude Financial Services Ltd.

How it works
Description

Crank up the volume and get ready to party no matter where you go, thanks to the Ultimate Ears BOOM 4 Portable Bluetooth Speaker! Your groovy music companion, this nifty device boasts balanced 360° sound, a splash-proof IP67 structure, deep bass effects, and a user-friendly one-touch button. It also equips a powerful Lithium Ion (Li-ion) battery that offers up to 15 hours of playtime, so you can enjoy your tunes for longer. To amplify your listening experience and create a bigger audio system, you can pair this unit with the compatible BOOM, MEGABOOM, EVERBOOM, EPICBOOM, and HYPERBOOM Bluetooth speakers.

Key Features

  • Listen Louder, Live Bolder: Dive into immersive 360° sound with the party-proof Ultimate Ears BOOM 4 Portable Bluetooth Speaker! Combining two 40 mm x 80 mm full-range drivers and a passive radiator woofer, this device is here to bring rich soundscapes partnered with deep and accurate bass effects.
  • Take Your Music Anywhere: The BOOM 4 Speaker is built with an IP67 water-resistant, splashproof, and dustproof structure, making it a perfect outdoor music companion. It is also engineered to withstand drops up to 1.5 metres (15 feet). In addition, this product is available in stunning colours to suit your style, such as Black, Blue, Raspberry, and Lilac*.
  • App-Enabled: By downloading the Ultimate Ears BOOM app, you can utilise PartyUp and pair your speaker with several BOOM, MEGABOOM, EVERBOOM, EPICBOOM, and HYPERBOOM portable Bluetooth speakers**. Now you can step up your entertainment and create a portable surround sound system!
  • Long-lasting Battery: Powered by a Lithium Ion (Li-ion) battery, this Ultimate Ears Speaker offers up to 15 hours of runtime. It also equips a handy battery indicator, so you’ll know when you have to recharge.
  • Accessible Controls: For seamless operations, this device incorporates a one-touch button where you play, pause, skip, and control music easily. It also lets you access your beloved playlists on platforms such as Spotify, Amazon Music (on Android), and Apple Music (on iOS) without having to reach your phone***.
  • Extremely Wireless: Say goodbye to pesky cables as this portable speaker supports Bluetooth and Wi-Fi connectivity. It can also be connected to two devices at the same time, allowing you to switch from one device to another seamlessly. Furthermore, this product has a wireless range of up to 45m, ensuring that the connection will stay stable even at a distance.
  • Made Sustainable: To help lessen its environmental impact, this BOOM 4 Portable Bluetooth Speaker by Ultimate Ears is built with 52% post-consumer recycled plastic (by weight).

*Ultimate Ears BOOM 4 Portable Bluetooth Speaker in Blue only.

**Other Ultimate Ears Portable Bluetooth Speakers are not included.

***Subscriptions for streaming services are sold separately. 

Specifications
All Product Details
Brand Ultimate Ears
Product Type Portable Bluetooth Speakers
Model Number 984-001979
Colour Blue
Product Specifications
Model Ultimate Ears BOOM 4
Speaker / Sound
Built-In Speakers Yes
Maximum SPL 85 dBC
Transducer 4
Driver Type Full Range
Driver Size (Speaker) 40 mm x 80 mm
Number of Driver 2
Woofer Type Passive Radiator Woofer
Battery
Battery Type Lithium Ion (Li-ion)
Rechargeable Yes
Battery Indicator Yes
Battery Life Up to 15 hours
Charging
Charging Method USB-C
Charge Time Approx. 3 hours
Connectivity
Wired / Wireless Wireless
Wireless Range Up to 45m
Connectivity Type Bluetooth, Wi-Fi
Maximum Paired Devices 2
Connection
USB Port 1 x USB Type-C
Durability
Durability Feature Water Resistant, Splashproof, Dust Resistant
Dimensions
Product Width 7.3 cm
Product Depth 7.3 cm
Product Height 18.4 cm
Product Weight 0.62 kg
Warranty
Manufacturers 24 Months
Reviews

Expert Reviews

Customer Reviews

Ultimate Ears BOOM 4 Portable Bluetooth Speaker - Cobalt Blue (984-001979) is rated 4.9 out of 5 by 25.
Rated 5 out of 5 by from No nonsense Very simple to connect and use. The sound this device produces is great. The main thing about this speaker is that it is so well made and designed so I really can't complain about anything. Everything works and works well.
Date published: 2025-02-28
Rated 5 out of 5 by from Great sound all around the room, and outdoors. A fantastic, powerful, Bluetooth speaker. Awesome sound.
Date published: 2025-01-02
Rated 4 out of 5 by from Fun! [This review was collected as part of a promotion.] I bought this for my brother for his birthday. I’ve ended up using it more than him. It’s great pairing it to another boom 4 and getting surround sound! Especially great for songs with a lot of left/right differentiation. Super easy to connect to using the app also.
Date published: 2024-12-17
Rated 5 out of 5 by from Great speaker The Ultimate Ears BOOM 4 delivers exceptional sound quality with deep bass and clear highs, making it perfect for any occasion. Its waterproof and durable design, along with a long battery life, makes it a reliable choice for outdoor adventures and parties.
Date published: 2025-01-11
Rated 5 out of 5 by from Loud bass, High quality and really good features [This review was collected as part of a promotion.] I bought my Boom 4 about 3 weeks ago and i could not be more happy with it. I bought it so i could have a loud and high quality speaker for my birthday party at the beach and it did not disappoint!
Date published: 2024-12-04
Rated 5 out of 5 by from battery life, sound quality, water proof, loud [This review was collected as part of a promotion.] I bought this speaker a week ago and it’s the best thing I have even bought the sound quality is great it’s very loud and battery life is outstanding I highly recommended
Date published: 2024-12-26
Rated 4 out of 5 by from Great features of the Boom 4 in Navy. [This review was collected as part of a promotion.] I got this a couple of days ago and already the sound quality is incredible, easy to set up and transport around. The bass and treble quality is incredible.
Date published: 2024-12-26
Rated 5 out of 5 by from Fantastic love it [This review was collected as part of a promotion.] Got for Christmas last year amazing has held up well and is very good for when doing sporting practice and need some music to pump me up.
Date published: 2024-12-29
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Delivery
Delivery

We aim to dispatch orders within 2 days. Delivery costs are calculated based on your location and the size of your order. Furniture may take up to 8 weeks to deliver as most products are made specifically for your order. Some Customer Direct products are shipped from overseas and may take longer to arrive. Some goods may take longer to deliver if a product is currently not in stock. A staff member will contact you where this occurs.

Easy returns

If you feel your product has failed a Consumer Guarantee (as defined by New Zealand Consumer Law) then don't worry you can easily return it to your local Harvey Norman store. We'll even pay for the postage if you live in an area where there is no store. Our returns policy covers any purchased item ( conditions apply).

What's in the box
  • ULTIMATE EARS BOOM 4
  • USB-C Cable
  • Quick Start Guide
Questions & Answers
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Terms & Conditions

Pricing Terms

Limit 2 per customer. Personal shoppers only. Trade not supplied. Available from Thursday 30th April 2026 until midnight Tuesday 5th May 2026.

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