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Cylindrical black fabric speaker with flat ends and a carrying loop

Ultimate Ears

Ultimate Ears 984-001390 portable speaker

SKU CH-4YFM-Y3NJ3 MPN 984-001390

A waterproof 360-degree Bluetooth speaker delivering 20-hour battery life, IP67 dust and water resistance, and a 45-metre wireless range

  • Spec summarySelect the best Sound for different occasions with 4 differe
  • Operating distancePair up to 8 Bluetooth enabled source devices - Connect up t
  • Driver sizeDrivers: Two 50 mm (2 in), 4 ohm full range drivers and two
  • Product colorBlack
  • Compatible withFor Audio Playback: Smartphones, tablets and other devices t
  • Key featuresLoud And True MEGABOOM 3 features powerful, immersive sound.
  • 360° immersive sound with deep bass you can feel
  • Magic Button plays, pauses and skips tracks directly on the speaker
  • IP67 waterproof and dustproof — submersible for 30 minutes and floats
  • Up to 20 hours battery life on a single charge
  • Pairs up to 8 devices, connects 2 simultaneously with 45 m range

What the MEGABOOM 3 is and who it suits

The Ultimate Ears MEGABOOM 3 is a portable Bluetooth speaker built for 360-degree sound. It targets listeners who want a single, rugged unit for outdoor gatherings, travel or home use. The cylindrical fabric-covered design produces immersive audio with deep bass you can feel. It is not for buyers who need stereo separation from two separate cabinets or a built-in voice assistant.

Practical limits of the Bluetooth interface

The speaker pairs with up to eight source devices and holds two active connections simultaneously. Wireless range extends to 45 metres or 150 feet in open space. Playback relies on the A2DP profile, so any phone, tablet or computer supporting that profile will stream audio. The Micro USB port charges the battery in about 2.5 hours. There is no auxiliary input, so wired sources cannot be connected directly.

Installation ease and common pitfalls

Power on, enable Bluetooth on your device and select MEGABOOM 3 from the list — no app is required for basic playback. The Magic Button on top handles play, pause and track skip without reaching for your phone. The IP67 rating means it survives full submersion for 30 minutes and floats, but the charge port cover must be sealed before water exposure. A frequent issue is forgetting to update firmware through the companion app, which can improve stability and add EQ presets.

How it compares

Measured against everything we stock in Bluetooth & Party Speakers, at today’s prices. Recalculated every night.

Price $166.99
Pricier than about 90% of the 862 comparable items (median $39.99).

Specifications

Product
Brand nameUltimate Ears
Model name984-001390
Product colorBlack
Audio & video
Driver sizeDrivers: Two 50 mm (2 in), 4 ohm full range drivers and two 55 mm × 86 mm passive radiators.
Connectivity
Operating distancePair up to 8 Bluetooth enabled source devices - Connect up to two source devices at the same time. Mobile range of play is up to 45m (150 ft).
Size & build
Product dimensions8.88 in × 3.38 in (H × Dia.)
Product weight2.04 lb (0.93 kg)
Shipping weight0.95 kg
Package size356 × 191 × 171 mm
Compatibility
Compatible withFor Audio Playback: Smartphones, tablets and other devices that support Bluetooth and Bluetooth Smart wireless audio profile [Advanced Audio Distribution Profile (A2DP)].

Questions about this item

How do I pick between the Night Black MEGABOOM 3 and other colour versions of the same speaker?

The 984-001390 model is supplied in Night Black only; choose this version if you want that specific two-tone fabric finish.

What does the 90 dBA maximum sound level mean when the speaker is playing in a typical room?

90 dBA is the peak output the two 50 mm drivers and dual passive radiators can reach, delivering 360-degree sound that fills a medium-sized space with clear, bass-heavy audio.

How does the Bluetooth connection limit the wireless range and device pairing in daily use?

Bluetooth pairs up to eight source devices and keeps two active simultaneously, with a practical mobile range of up to 45 m (150 ft) for uninterrupted streaming.

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