Ultimate Ears Boom 4 Specifications and Review

Last updated: August 17, 2026

The Ultimate Ears Boom 4 ranks #88 out of 136 total Medium Size Portable Bluetooth Speakers for sound quality. See Top Recommended Speakers By Attribute for all the top speaker suggestions.

Brand: Ultimate Ears

Prices on this page were last checked August 21, 2026 at 5:30 AM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.

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Ultimate Ears Boom 4 - ranked #88 of 136 Medium Size Portable Bluetooth Speakers · Editor's rating 2.9/5
Check price at Amazon ($105) →

#88 Ultimate Ears Boom 4: $105 Amazon eBay

Pros: IP67 rated, floats, and finally charges via USB-C instead of the older Booms’ Micro-USB. 15 hour battery. Customizable EQ and speaker-pairing via the UE app.

Cons: Not much improvement over the old ones. Weak bass extension and thuddy bass. Gets distorted above 90%

Related speakers: Ultimate Ears Boom 3.

How it compares: Just above it: Ultimate Ears Wonderboom - $26 cheaper, 5 fewer hours of battery life. Just below it: Ultimate Ears Boom 3 - $44 more.

AppYes
Aux InputNo
Battery Life15 hours (Manufacturer specified)
Bluetooth Version5.1
Built in MicrophoneNo
Digital Aux InputNo
Dimensions7.2" x 2.9" x 2.9" (184 x 73 x 73 mm)
Drivers2x 1.57" (40mm) active drivers + 2x 1.81" x 2.57" (46.1 x 65.2mm) passive radiators
EQYes (via app)
IP RatingIP67
Max Volume85dBC
OmnidirectionalNo
Power BankNo
Power InputUSB-C
StereoYes
TWSYes
Weight1.4 lbs / 620 g
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