Customer Reviews for Ultimate Ears BOOM 4 Wireless Portable Bluetooth Speaker, Cobalt Blue (984-001967)
Item # : IM1KS0755
Model # : 984-001967
- This portable wireless Bluetooth speaker delivers 360-degree sound with deep bass, making it perfect for versatile use in both indoor and outdoor settings
- Compatible with a wide range of devices, this speaker supports audio playback from smartphones, tablets, and other Bluetooth-enabled devices that support the Advanced Audio Distribution Profile (A2DP)
Price is $149.99
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12 reviews
Most helpful positive review
Posted Jun 5, 2025
Great speaker
Great speaker! It’s a super sexy speaker in the cobalt blue. Great sound quality and product for the price. Would recommend.
GS
Reviewed at:
Ultimate Ears
Posted Jun 5, 2025
Great speaker
Great speaker! It’s a super sexy speaker in the cobalt blue. Great sound quality and product for the price. Would recommend.
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Response from Staples :
That's wonderful feedback! We're thrilled to hear you're enjoying your Boom 4 Speaker. It sounds like the cobalt blue is a real hit, and we're so happy that you find the sound quality and overall value to be great. We truly appreciate you recommending it!
Trung, June 12, 2025
GLAYNES
Reviewed at:
Ultimate Ears
Posted Nov 29, 2024
👏🙌Great
The Hyperboom is an absolute game-changer in the world of audio. From the moment I powered it on, I was blown away by its crystal-clear sound, rich bass, and dynamic range. Whether you’re streaming music, watching movies, or hosting a party, this speaker effortlessly elevates any audio experience.
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Kevin F.
Reviewed at:
Ultimate Ears
Posted Oct 26, 2024
Wonderful just wonderful
I really like this. It is a replacement for an earlier model. I would like it if I could purchase a longer charging cord.
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Timothy C.
Reviewed at:
Ultimate Ears
Posted Sep 23, 2024
Awesome
I like that it matches the sea charger. I had the boom three so far no complaints at all has a lot longer charging. Than expected.
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Keila C.
Reviewed at:
Ultimate Ears
Posted Sep 9, 2024
GREAT SIZE AND SOUND!
I love the size, quality sound is great and battery lasts a lot. Good decision!
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Reviewed at:
Ultimate Ears
Posted Aug 23, 2024
Made for loud music
Sounds good but not quality. Sounds distorted when in lower levels. Okay for needing a loud speaker for outside activities. Stick to a sound system if you want quality music.
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Susan Busby
Reviewed at:
Ultimate Ears
Posted Aug 2, 2024
Poolside Perfect Sound
We LOVE our Wonderboom 4s! They pair easily and sound great out by our pool!
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Reviewed at:
Ultimate Ears
Posted Jul 28, 2024
Big on sound
This little tube has a large speaker sound. It is impressive that you have a large speaker sound from a compact design. Thanks
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