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Cylindrical purple Bluetooth speaker with fabric wrap

Ultimate Ears

Ultimate Ears BOOM 4 984-002009 Enchanting Lilac portable audio

SKU CH-F05X-N3MJR

Portable Bluetooth speaker delivers 360-degree sound with 15-hour battery life, IPX7 waterproofing, 1.5 m drop resistance and 147 ft wireless range

  • Size and weight2
  • Product typeWireless Bluetooth Speaker
  • Product colorPurple
  • 360-degree immersive sound fills every direction
  • 15-hour battery keeps music playing all day
  • IPX7 waterproof rating survives full immersion
  • 147-foot Bluetooth range lets you roam freely
  • PartyUp pairing links multiple speakers for bigger sound

Portable wireless speaker with 360-degree sound

The Ultimate Ears BOOM 4 in Enchanting Lilac delivers rich, 360-degree audio with deep, accurate bass balanced for clear detail. Bluetooth connectivity pairs quickly with phones, tablets and laptops. The single-driver design keeps the unit compact while still filling a room or campsite with immersive sound. Buyers who need stereo separation from a single box or a built-in voice assistant will not find those features here.

IPX7 waterproof and drop-proof to 1.5 metres

A rugged fabric wrap and rubberised ends protect the speaker from full immersion and drops up to 1.5 metres, and the unit floats if it lands in water. The IPX7 rating means it survives accidental spills, poolside splashes or sudden rain without missing a beat. No mounting threads or carabiner loops are included, so securing it to a pack or bike requires a separate strap or clip.

15-hour battery and PartyUp multi-speaker pairing

The rechargeable cell provides up to 15 hours of playback on one charge, covering a full day of listening. The Magic Button on top enables one-tap play, pause, skip and direct access to streaming playlists on Spotify, Amazon Music or Apple Music. Using the Ultimate Ears BOOM app, PartyUp links multiple compatible speakers for wider coverage, though the app itself must be installed on a mobile device to manage the grouping.

How it compares

Measured against everything we stock in Earbuds, Earphones & Mini Speakers, at today’s prices. Recalculated every night.

Price $55.99
Pricier than about 68% of the 231 comparable items (median $40.99).

Specifications

Product
Brand nameUltimate Ears
Model name984-002009
Product typeWireless Bluetooth Speaker
Product colorPurple
Size & build
Size and weight2

Questions about this item

What Bluetooth range does the BOOM 4 984-002009 achieve?

The speaker maintains a wireless connection up to 147 feet from the source device.

What are the physical limits for water and drop exposure?

It is rated IPX7 waterproof and survives drops up to 1.5 meters.

How do I enable one-touch playlist playback on the speaker?

Configure the Magic Button in the Ultimate Ears BOOM app to link Spotify, Apple Music or Amazon Music.

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