# Stereo portable speaker Ultimate Ears BOOM 4 — Blue, driver 4 cm, passive radiator 46.1×65.2 mm, Bluetooth range 45 m

**URL:** https://aio.lv/en/product--ultimate-ears-984-001977--11694587
**Data updated:** 2026-02-23 13:23 (EET)
**Category:** Portable Speakers
**Manufacturer:** ultimate ears
**Manufacturer code:** 984-001977
**EAN:** 5099206125292
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

Ultimate Ears BOOM 4 is a stereo portable speaker in a cylindrical design, finished in blue. It features a 4 cm driver and a passive radiator sized 46.1 × 65.2 mm, producing a maximum sound pressure level of 85 dB. Wireless Bluetooth connectivity with A2DP profile and up to 45 m range enables versatile placement. Lightweight (0.62 kg) and universal in use, it suits indoor and outdoor listening and on-the-go audio.

## Long description

Ultimate Ears BOOM 4 is a stereo portable speaker in a cylindrical blue housing designed for versatile indoor and outdoor use. It integrates a 4 cm driver and a passive radiator (46.1 × 65.2 mm) to deliver balanced sound with a stated maximum sound pressure level of 85 dB. The speaker supports Bluetooth wireless audio with A2DP profile and offers up to 45 m range for flexible placement. With a lightweight build of 0.62 kg and a one-touch control for basic playback commands, BOOM 4 is intended for on-the-go listening and shared audio situations.
Advantages
The design provides spatial 360° stereo sound from its cylindrical enclosure, promoting even sound dispersion around the unit. A passive radiator and a dedicated driver contribute to deeper, controlled bass for a compact speaker. Bluetooth connectivity with an extensive range enables placement farther from the audio source than many portable speakers, while the low weight makes it easy to carry. The product also incorporates practical features such as one-touch playback control and compatibility with multi-speaker pairing via the manufacturer's app.
Suitable for
Portable music playback at home or outdoors
Small gatherings and social events where 360° sound is useful
On-the-go use such as beach, park, or travel where lightweight and durable design is needed
Key specifications
Driver diameter: 4 cm
Passive radiator dimensions: 46.1 × 65.2 mm
Maximum sound pressure level: 85 dB
Wireless profile: Bluetooth A2DP
Bluetooth range: up to 45 m
Weight: 0.62 kg
Colour: Blue
Playback control: one-touch play/pause/skip
Battery life (manufacturer stated): up to 15 hours
How to use
Charge the speaker fully before first use following the manufacturer’s charging instructions. Activate Bluetooth on your audio source, open the device list, and select the speaker to pair via the A2DP profile. Use the one-touch control on the speaker to play, pause, or skip tracks as supported by your streaming app. For expanded setups, use the UE \| BOOM app to access preset EQ modes, create one-touch playlists, and pair multiple compatible speakers for synchronized playback.
Usage recommendations
Place BOOM 4 on a stable surface in the central area of your listening space to maximize the 360° sound dispersion. For stronger bass response, position the speaker near a solid surface; for more even room coverage, keep it elevated and clear of obstructions. When using outdoors, maintain a clear line of sight within the stated Bluetooth range for reliable wireless connection.

## Specifications

### Performance

| Feature | Value |
|---|---|
| Bass adjustment | Yes |
| Remotely operated | Yes |
| Recommended usage | Universal |

### Packaging content

| Feature | Value |
|---|---|
| Cables included | USB Type-C |
| Quick start guide | Yes |

### Ports & interfaces

| Feature | Value |
|---|---|
| Connectivity technology | Wireless |
| USB connector type | USB Type-C |
| AUX in | No |
| Bluetooth range | 45 m |

### Design

| Feature | Value |
|---|---|
| Product colour | Blue |
| Volume control | Buttons |
| Product design | Cylinder |
| On/off switch | Yes |
| Protection features | Waterproof, Dustproof, Splash proof |
| Hook | Yes |
| Product type | Stereo portable speaker |

### Technical details

| Feature | Value |
|---|---|
| Equalizer | Yes |
| Bluetooth | Yes |
| International Protection (IP) code | IP67 |
| USB connectivity | Yes |
| 3.5 mm connector | No |

### Battery

| Feature | Value |
|---|---|
| Battery technology | Lithium-Ion (Li-Ion) |

### Loudspeakers

| Feature | Value |
|---|---|
| Number of drivers | 4 |
| Driver diameter | 40 mm |
| Number of speakers | 1 |
| Number of passive radiators | 2 |
| Passive radiator size (W x D) | 46.1 x 65.2 |

### Power

| Feature | Value |
|---|---|
| Battery type | Built-in battery |
| Battery life (max) | 15 h |

### Weight & dimensions

| Feature | Value |
|---|---|
| Weight | 0.62 kg |
| Height | 184 mm |
| Width | 73 mm |
| Depth | 73 mm |

### Audio

| Feature | Value |
|---|---|
| Sound pressure level (max) | 85 dB |

### Features

| Feature | Value |
|---|---|
| LED indicators | Bluetooth |
| Wi-Fi | No |
| Bluetooth profiles | A2DP |

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All ultimate ears products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized ultimate ears service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: weight, number of speakers, product colour, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

## Image

https://aio.lv/img/cache/product/11694587/67062396_large.webp