Ultimate Ears

Ultimate Ears WONDERBOOM 4

Name: Ultimate Ears WONDERBOOM 4
Brand: Ultimate Ears

Wirecutter's blind test favored this over pricier rivals for open 360-degree sound from dual drivers and passive radiators. IP67 sealing and a 5-foot drop rating back a 15-ounce shell.

$100 typical

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EDITION 01RESEARCHED 2026-07-242 SOURCESREFRESH DUE 2027-01

SUBSTANCE SCORES

substance0.0/ 10

design8.0/ 10

value2.0/ 10

WHY THE PRICE IS JUSTIFIED

Wirecutter’s brand-concealed testing made it its favorite, rather than merely rewarding specs. It combines two active drivers and passive radiators with IP67/float/drop credentials—real construction and acoustic utility at a modest price.

MATERIALS

EnclosureDurable fabric and rubberized plastics

The grippy, protected shell supports its IP67 sealing, floating ability and stated 5-foot drop resistance.

CRITERIA

8/10

Sound balance (0.28)

Wirecutter calls its sound excellent; 360° presentation works well at close-to-medium range.

6/10

Output headroom (0.18)

Strong for a 15-ounce mini, not a party speaker.

7/10

Battery reality (0.16)

Wirecutter measured about 11 hours; USB-C charging.

9/10

Rugged sealing (0.14)

IP67, floats, and stated 5-foot concrete-drop resistance.

10/10

Portable ergonomics (0.10)

15 oz, compact round body and integrated loop.

IDEAL FOR

·Travel and daypacks
·Pool or shower use
·Small rooms
·A durable gift

NOT FOR

·Deep bass
·EQ tweakers
·Large outdoor gatherings

DESIGN & ERGONOMICS

A friendly, stable little cylinder with large tactile controls and an integrated hanging loop. Excellent grab-and-go design; its trade-off is no app EQ.