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Cylindrical blue speaker with attached bungee loop, fabric-wrapped body, rubber end caps, floating design

Logitech

Logitech 984-001989 Ultimate Ears MEGABOOM 4 portable speaker Blue

SKU CH-1KKA-46MS2 MPN 984-001989

Waterproof Bluetooth speaker delivers 360-degree sound with thundering bass, floats, runs 20 hours and reaches 45 metres

  • NameUltimate Ears MEGABOOM 4 Wireless Bluetooth® Speaker (Blue)
  • ColorBlue
  • Speaker TypeBluetooth Speaker
  • SpecificationPOWER Rechargeable lithium-ion battery for up to 20 hours of
  • CompatibilityFor audio playback: smartphones, tablets and other devices t
  • ConnectivityCharge Type: Charges via USB-C cable (not included)
  • 360-degree sound from larger woofer for balanced audio
  • Up to 20 hours playback from rechargeable lithium-ion battery
  • IP67 waterproof rating and floating design for pool use
  • PartyUp pairs multiple compatible speakers for surround sound
  • 54% post-consumer recycled plastic in plastic parts

Product identity

The Ultimate Ears MEGABOOM 4 is a portable Bluetooth speaker built for listeners who want 360-degree sound with deep bass in a rugged, floating design. It suits outdoor gatherings, poolside use and travel where a durable, waterproof speaker is required. Buyers who need a wired audio input or a built-in voice assistant will not find those features here.

Thermals, noise and power

The rechargeable lithium-ion battery delivers up to 20 hours of playback at the default 42% volume level, while maximum output reaches 85 dBC. Passive cooling keeps the unit silent during operation, and the speaker charges via a USB-C connection. No active fans or thermal throttling are present.

Build integration

An IP67 rating makes the speaker fully waterproof and dustproof, and it floats when dropped in water. The compact cylindrical form measures 225 mm in height and 87 mm in diameter, weighing 935 g, so it fits easily in a backpack or cup holder. PartyUp in the BOOM app lets you link multiple compatible Ultimate Ears speakers for wider coverage.

Highlights

  • 360-degree sound from larger woofer for balanced audio
  • Up to 20 hours playback from rechargeable lithium-ion battery
  • IP67 waterproof rating and floating design for pool use
  • PartyUp pairs multiple compatible speakers for surround sound
  • 54% post-consumer recycled plastic in plastic parts

Specifications

BrandUltimate Ears
NameUltimate Ears MEGABOOM 4 Wireless Bluetooth® Speaker (Blue)
Model984-001989
Part Number984-001989
ColorBlue
Speaker TypeBluetooth Speaker
SpecificationPOWER
Rechargeable lithium-ion battery for up to 20 hours of play time
*Playing at default volume(42%).Actual battery life will vary with use, settings and environmental conditions
AUDIO
Maximum sound level: 85dBC in the anechoic chamber; 91 dBC on the ground plane
Drivers: two 4 ohm 1.97 x 1.97in (50x 50 mm) (2”) full range; two 55 mm x 86 mm passive radiators
WIRELESS CAPABILITIES
147 feet (45 meter) range
CompatibilityFor audio playback: smartphones, tablets and other devices that support Bluetooth [Advanced Audio Distribution Profile (A2DP)]
ConnectivityCharge Type: Charges via USB-C cable (not included)
Wireless TechnologyBluetooth
Operating Range147 feet (45 meter) range
BatteryRechargeable lithium-ion battery
Playback Time (up to)up to 20 hours of play time
Features20-HOUR BATTERY
VIRTUALLY INDESTRUCTIBLE
SIGNATURE + 4 PRE-SET EQ MODES
DimensionsHeight: 0.7 ft (225 mm)
Width: 0.2 ft (87 mm)
Length: 0.2 ft (87 mm)
Weight32.98 oz (935 g) (speaker only)
Package ContentsULTIMATE EARS MEGABOOM 4
Bungee (attached to product)
Quick Start Guide ( printed inside the box)
Shipping weight1.23 kg
Package size245 × 141 × 99 mm

Other versions of this model

3 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

How do I connect the MEGABOOM 4 to my phone for the first time?

Enable Bluetooth on your phone, press the Bluetooth button on the speaker until the tone sounds, then select "MEGABOOM 4" from your device list. The speaker supports A2DP for audio playback and has a 45 meter range.

What part of the MEGABOOM 4 will wear out first and can I replace it?

The rechargeable lithium-ion battery is rated for up to 20 hours of play time at 42% volume. It is built into the speaker and is not user-replaceable, so the battery life will gradually decrease over years of charge cycles.

How long can I run the MEGABOOM 4 at full volume before the battery dies?

The 20-hour rating is measured at 42% default volume. At maximum 85 dBC output the battery drains significantly faster, so sustained loud playback will hit the battery limit well before the rated time.

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