1 / 7Ultimate Ears Boom 4 Portable Bluetooth Speaker, Red
The Ultimate Ears Boom 4 is a portable Bluetooth speaker described as waterproof, with 360-degree sound, app controls and a claimed 15-hour battery life. Its outdoor-oriented protection and multi-speaker pairing suit portable listening, but battery life and connectivity receive mixed customer feedback.
At a glance
- Manufacturer claims 360-degree sound and up to 15 hours of playback per charge. Actual battery life may vary with use, settings and environmental conditions.
- The listing describes IPX7 waterproofing and drop protection up to 15 feet (1.5 meters).
- PartyUp can connect compatible Ultimate Ears speaker families through the app. WONDERBOOM and MINIROLL are excluded from the stated compatibility.
- A Magic Button is described for playback controls and configured one-touch playlists on supported services.
Reference price: $179.99
Price checked: Nov 14, 2026
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Pros and cons
Pros
- Portable cylindrical design with stated tabletop placement and 0.81 kg listed weight.
- Bluetooth connection and app-based EQ options provide playback and sound-setting flexibility.
- The listed protection claims and PartyUp feature are relevant for outdoor listening and compatible multi-speaker setups.
Technical specifications
24 specifications| Brand | Ultimate Ears |
|---|---|
| Model | Boom 4 |
| Colour | Red |
| Model number | 984-002004 |
| Maximum output power listed | 10 watts |
|---|---|
| Audio output mode listed | Stereo |
| Audio channels listed | 2.1 |
| Driver type listed | Dynamic Driver |
| Wireless connection listed | Bluetooth |
|---|---|
| Control method listed | App |
| Bluetooth range claimed | 45 meters |
| PartyUp pairing | Use PartyUp on the Ultimate Ears Boom app to pair several BOOM, MEGABOOM, EVERBOOM, EPICBOOM, and HYPERBOOM portable Bluetooth speakers, creating the ultimate surround sound experience (Not compatible with WONDERBOOM and MINIROLL) |
| Power configuration | Battery Powered |
|---|---|
| Battery life claimed | 15 hours on a single charge |
| Battery listed | 1 Lithium Polymer batteries required. |
| Enclosure material listed | Plastic |
|---|---|
| Water resistance listed | Waterproof |
| Dust and impact claims | Dustproof, Portable, Shockproof, Stereo Pairing, Waterproof |
| Protection details claimed | Rated IPX7 waterproof and drop-proof up to 15 feet (1.5 meters) |
| Mounting type listed | Tabletop |
|---|---|
| Dimensions and weight listed | 10.16 x 10.16 x 20.32 cm; 810 g |
| Weight listed | 0.81 kg |
| Recycled plastic claim | minimum of 52% post-consumer recycled plastic by weight |
|---|---|
| EQ modes | 4 different EQ modes (BASS BOOST, CRAMPED SPACES, DEEP RELAXATION, PODCAST/VOCAL) |
What to know before buying
Listing details to confirm
Listing protection details conflict: one feature claim says IPX7 and drop-proof to 15 feet (1.5 meters), while another manufacturer panel says IP67, dust-proof, waterproof and floatable. The listing also differs between dimensions of 10D x 10W x 20H centimetres and 10.16 x 10.16 x 20.32 cm, and separately lists 810 g and 0.81 kg. Confirm the selected listing’s exact configuration and protection details. The 15-hour battery and 45-metre Bluetooth range are claims that may vary with conditions and connected devices.
Who is it for?
A good fit for
- People seeking a compact portable Bluetooth speaker for travel, parties or outdoor listening.
- Buyers who want app-based EQ and control, or plan to pair with compatible Ultimate Ears speaker families.
Less suited to
- Buyers who need reliably documented battery life or connectivity, given the mixed customer feedback on those areas.
- Buyers who need a settled IP rating, drop-protection specification or exact dimensions without checking the listing details.
Customer reviews on Amazon
- 5 stars
73% 73% - 4 stars
6% 6% - 3 stars
5% 5% - 2 stars
7% 7% - 1 star
9% 9%
Customer feedback highlights generally positive impressions of sound quality and ease of use, alongside positive value comments. Battery life, reliability and connectivity experiences are mixed. These reports matter for a portable Bluetooth speaker whose stated battery life is 15 hours and whose range is presented as up to 45 metres, but they do not establish how an individual unit will perform.
Positive themes
- Customer feedback describes good overall sound quality and ease of use.
- Customer feedback includes positive value-for-money impressions.
Mixed feedback
- Customer feedback reports mixed experiences with battery life, reliability and connectivity.
Frequently asked questions
How long is the Boom 4’s stated battery life?
The listing claims 15 hours on a charge. It also cautions that actual battery life varies with use, settings and environmental conditions, and customer feedback is mixed on battery life.
What water and drop protection does the listing claim?
The listing is inconsistent. One feature states IPX7 and drop protection up to 15 feet (1.5 meters), while another panel claims IP67, dustproofing and floatability. Verify the details for the selected listing.
Can it pair with other Ultimate Ears speakers?
The listing describes PartyUp pairing through the app with BOOM, MEGABOOM, EVERBOOM, EPICBOOM and HYPERBOOM. WONDERBOOM and MINIROLL are stated as incompatible.
What is the listed Bluetooth range?
The listing claims 45 meters (147 feet), but says the actual range varies with use, settings and the number of connected devices.
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