Ultimate Ears Megaboom 4 Waterproof Bluetooth Speaker

Ultimate Ears Megaboom 4 Waterproof Bluetooth Speaker

By Ultimate Ears · Portable Bluetooth Speakers · Audio & Electronics

  • 360-degree sound
  • IP67 waterproof, floats
  • 20-hour battery life
  • 147ft (45m) Bluetooth range, multi-speaker pairing via the UE Boom app

Lowest price seen
$199.99
from $199.99 at Ultimate Ears (Logitech) D2C · Checked Sep 28, 2026

Prices are snapshots. Check the current price with the store.

Problems, parts and running costs

Summary

A large, bass-forward 360° portable Bluetooth speaker meant to sit by a pool or in a room rather than travel. Check the size before you buy: at 0.935 kg and roughly twice as tall as it is wide, a hands-on reviewer would not carry it in a backpack.

Strengths

  • 360° sound means placement barely matters in a room.
  • High volume fills a medium-sized room and suits parties and poolside use.
  • IP67 dust and water sealing, plus a body that floats.
  • App EQ with useful preset modes, including signature and bass boost.
  • Quick recharge: a reviewer saw a full charge within a couple of hours.

Weaknesses

  • Too tall and heavy to be practical in a backpack.
  • Lab testing found middling sound quality, with distortion and a two-dimensional soundfield.
  • Deep bass is lacking despite the bass-forward marketing.
  • No built-in microphone, no wired inputs and no firmware updates.
  • Driver configuration is unverified for this model.
  • Warranty duration in years could not be confirmed.

Verified specifications

Typeportable Bluetooth speaker with 360° sound, floatable and built to be splashed.
Driverslisted as 2 × 50 mm 4-ohm full-range drivers and 2 × 55 × 86 mm passive radiators, though the configuration is not confirmed by first-party text.
Dimensions22.5 × 8.7 × 8.7 cm (9 × 3.5 × 3.5 in); 0.935 kg (2.1 lbs).
Batteryup to 20 hours claimed; charging about 3 hours.
Water and dustIP67, immersion up to 1 m for 30 minutes.
Frequency response60 Hz – 20 kHz.
ConnectionsBluetooth only; no analog, optical or headphone input.
Microphonenone, and no speakerphone.
Firmwarenot updatable.
Multi-speakerTWS stereo pairing of two units, plus PartyUp in the UE | BOOM app; the manufacturer describes linking up to 150-plus speakers.
ControlsMAGIC BUTTON for playback and one-touch playlists on Spotify, Amazon Music and Apple Music.
Materialsminimum 54% certified post-consumer recycled plastic by weight.
Carbon footprint34.13 kg CO2e.
IncludedUSB charging cable and Quick Start.
Full research notes and sources

Bass, size and portability

The MEGABOOM 4 is the largest speaker in Ultimate Ears’ portable range, sold alongside the smaller BOOM 4, WONDERBOOM 4, EVERBOOM, EPICBOOM and HYPERBOOM. It is a tall cylinder at 22.5 × 8.7 × 8.7 cm and 0.935 kg — Consumer Reports lists the same unit as 9 × 3.5 × 3.5 in and 2.1 lbs — roughly twice as tall as it is wide.

The clearest caution is portability. What’s The Best lists exactly one con, that better options exist for a portable speaker, and explains that the size and shape made the MEGABOOM 4 impractical to put in a backpack; the reviewer swapped it for a smaller Anker Soundcore before heading to friends’. Buy it to leave by the pool, on a patio or in a room, not to carry around.

Sound quality: two tests disagree

What’s The Best reported high volume that fills a room, clarity that stayed refined rather than muddy despite the bass emphasis, and successful handling of bass-heavy music. It attributes the lower distortion to softer passive radiators than the Megaboom 3’s. It rated the speaker 4.0 overall, with Performance 4.5, Build 4.0, Features 4.0 and Value 4.0, and recommended it for poolside, desk or whole-of-house listening.

Consumer Reports’ lab result is cooler: middling sound quality with distortion and other audio issues, bass with decent impact but lacking deep bass and a touch boomy, a fairly even but grainy, hazy and slightly nasal midrange, subdued and slightly sizzly treble, so-so room-ambience recovery, and a two-dimensional soundfield that fills a medium-sized room. Neither source publishes raw measurement data in the retrieved text, so the disagreement stands.

Battery, charging and controls

Battery life is up to 20 hours, with a manufacturer footnote that high volume and bass boost shorten it; Consumer Reports records the figure as a claim rather than a measurement. Charging takes about 3 hours, and a reviewer saw a full charge within a couple of hours after draining the unit.

The speaker has no microphone and no speakerphone, no analog, optical or headphone input, and firmware cannot be updated. Two units can be paired over TWS for a wider stereo image, and PartyUp in the UE | BOOM app links the MEGABOOM 4 with other Ultimate Ears speakers; the manufacturer describes linking up to 150-plus. A MAGIC BUTTON handles playback and one-touch playlists.

Care and upkeep

Charging runs over USB-C behind a rubber-sealed flap that also maintains the waterproofing, so keep it closed. IP67 covers dust-tightness and immersion to 1 m for 30 minutes, and the body floats. No user-replaceable part is documented and the battery is not sold as a replacement. The manufacturer offers a warranty covering material or workmanship issues plus a 30-day money-back guarantee, but the warranty term in years was not visible.

Which model this is

This page covers the Ultimate Ears MEGABOOM 4, listed in Cobalt Blue or Active Black. It is a different, larger unit with a larger woofer than the 2018 MEGABOOM 3. Do not merge it with the BOOM 4, WONDERBOOM 4, EVERBOOM, EPICBOOM or HYPERBOOM. The US Amazon listing for this model is ASIN B0CVFM97GD.

The manufacturer’s own spec panel did not render in the version retrieved, so the published driver line should be treated as unconfirmed for this model until a first-party spec sheet is read.

Sources

Manufacturer:

Independent reviews:

Owner reports:

  • No owner forum thread or retailer Q&A page for this model was found during this check.

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