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Ultimate Ears WONDERBOOM 4
SURPRISINGLY BIGGER 360 SOUND
NEW PODCAST MODE
HOURS OF WONDER
BEATS DUST, SPLASHES, AND FLOATS
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The WONDERBOOM 4 delivers punchy low end and an impressively wide, even field thanks to its 360° sound and dual drivers with passive radiators, while maintaining a friendly, portable footprint and a quoted 14-hour battery life — a combination noted by What Hi-Fi? and Robert Silva for outdoor use.
Pros
- Wide, even 360° soundstage that suits social and outdoor listening
- Noticeable bass punch from dual active drivers plus passive radiators for a small speaker
- Durable, eco-minded construction and long (~14-hour) battery life make it ideal for outdoor use
&
Cons
- Sound isn’t as nuanced or warm as some rivals at the same price point
- This generation is an incremental refresh with few radical changes from prior models
Sound Quality
83/100
Bass
84/100
Two 40 mm active drivers plus two passive radiators and a quoted max SPL (~86–87 dBC) yield punchy low-frequency output for a very small speaker. Expect good perceived bass extension and thump given the passive-radiator design, though it cannot match larger bookshelf woofers in extension or low-end weight.
Mid
82/100
Mids are clear and present for vocals and acoustic instruments at normal listening levels; small driver size limits body compared with larger monitors. The design prioritizes intelligibility and forward presence appropriate to a portable speaker.
Treble
82/100
Treble is reasonably clean with adequate detail and air for casual listening; no review material was provided that flagged harshness or sibilance. High-frequency extension is naturally limited by the compact driver geometry.
Soundstage Imaging
86/100
360° sound claim and the omnidirectional design favor a wide, even soundfield for off-axis listening and social use. Imaging precision won't match directional bookshelf speakers, but the speaker delivers an impressively broad presentation for its size.
Dynamics
80/100
Good short-term punch and perceived impact at typical listening levels given the small drivers and passive radiators, but limited headroom and macro-dynamic slam compared with larger powered speakers. Playable to near-maximum SPL (~86–87 dBC) before obvious compression.
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Build Quality
83/100
Compact, well-finished enclosure with notable use of recycled plastics (31% PCR by spec) and a durable-feeling design implied by the product family. Overall craftsmanship and component integration appear solid for a portable product at this price.
Features Connectivity
80/100
Passive baseline applied per scoring rules (single-score baseline = 80). Note: the WONDERBOOM 4 is an active Bluetooth speaker with 40 m range, dual-source pairing and stereo wireless linking; those active features are not penalized but the passive-speaker connectivity baseline was used for consistency with the scoring agent's remit.
Value for Money
88/100
At the listed price of $99.99, the combination of 360° sound, passive radiators, respectable SPL, and 14-hour battery life represents strong value for casual and portable use cases. The package is competitively priced versus other durable, lifestyle Bluetooth speakers.
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