Bluetooth Speakers / Ultimate Ears
Ultimate Ears WONDERBOOM 4
Floats, survives a 5-foot drop, 360-degree sound — the poolside pick.
Overall score 6.9/10
Pros
- + It genuinely floats, which matters at a pool or on a boat
- + IP67 plus a 5-foot drop rating — the most rugged small speaker here
- + 360-degree sound is more room-filling than a forward-firing design
- + Outdoor Boost is genuinely useful outside
Cons
- − No companion app and no EQ at all
- − No microphone, so it cannot take calls
- − Ultimate Ears publishes no power figure
- − Distorts noticeably when pushed loud
- − Cannot pair with any other Ultimate Ears speaker, only another WONDERBOOM 4
Ultimate Ears WONDERBOOM 4 review: what the specs say
Floats, survives a 5-foot drop, 360-degree sound — the poolside pick. At $79.99, Ultimate Ears's 2024 model sits among the cheapest we cover — the bluetooth Speakers we compare run from $34.99 to $549.95. It scores 6.9/10 overall, calculated from published specifications across 8 categories rather than from a subjective impression.
Its strongest showing is Durability at 9.5/10 — IP rating, drop resistance and whether it floats. The weakest is Features at 4.5/10, which is the trade-off to weigh before buying: if that is the specification you care about most, one of the alternatives below will serve you better.
Worth knowing before you buy: no companion app and no EQ at all; and no microphone, so it cannot take calls. Every specification on this page comes from Ultimate Ears's own documentation or a verified retail listing — where a figure is not published, the table says so rather than estimating it.
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Full Specifications
| Battery Life | 14 hrs |
| Water & Dust Rating | IP67 — dust and water, to 1m for 30 minutes |
| Floats | Yes |
| Power Output | Ultimate Ears does not publish wattage; maximum SPL is quoted as 87dB W |
| Weight | 420 g |
| Bluetooth | 5.2 |
| Drivers | 2x 40mm active drivers plus 2x 46.1 x 65.2mm passive radiators |
| Stereo & Multi-Speaker Pairing | Double Up pairs two WONDERBOOM 4 units; it is not cross-compatible with earlier WONDERBOOMs, BOOM, MEGABOOM or HYPERBOOM |
| Speakerphone | No |
| App EQ | No |
| Charges Your Phone | No |
| Connectivity | Bluetooth 5.2 |
| Material | Rubberised fabric-wrapped cylinder |
| Warranty | 12 months |
Compare Ultimate Ears WONDERBOOM 4 With
Cheaper Alternative
JBL Go 5 — $49.95
Premium Alternative
JBL Flip 7 — $149.95