Anker soundcore · Boom
Boom 3i
A compact Bluetooth speaker that floats upright, with a detachable strap, dust and water protection and app-adjustable sound.
- Type
- Portable speaker
- Atmos
- No
- Connects by
- Bluetooth
- Battery
- 16 h
- Weight
- 0.78 kg
What reviewers say
Reviewers praise the rugged, floating design and useful app, but find the default sound bass-heavy with subdued voices and recommend EQ adjustment. CHIP finds excellent Bluetooth range and battery endurance; SoundGuys warns that the strap's plastic clips can come loose.
From soundguys.com and chip.de
Specifications
Report a wrong or missing specSound
- Type
- Portable speaker
- Dolby Atmos
- No
- Drivers
- 3.7 × 2-inch woofer, 0.65-inch tweeter and two passive bass radiators
- Amplifiers
- 50 W total; 40 W woofer and 10 W tweeter
- Frequency response
- 56 Hz – 20 kHz
- Audio formats
- SBC and AAC over Bluetooth
- Room tuning
- BassUp 2.0 bass enhancement and custom EQ in the app
Connections
- Wi-Fi
- No
- Bluetooth
- Yes
- AirPlay
- No
- Voice assistants
- None
- Bluetooth
- Bluetooth 5.3
- Ports
- USB-C charging input; no charging output or wired audio input
- Multi-room
- TWS pairing of two Boom 3i speakers for left/right stereo
- App
- Soundcore app for EQ, BassUp, lighting, firmware updates, recorded voice-message playback, emergency alarm and Buzz Clean vibrations to dislodge debris. The maker recommends current firmware for improved sound; SoundGuys tested firmware 01.20
Design
- Battery life (maker's claim)
- Up to 16 hours
- Water and dust resistance
- IP68
- Weight
- 0.78 kg
- Battery life detail
- Up to 16 hours, dependent on volume and content; charge in under 4 hours with 5 V / 3 A USB-C input
- Controls
- Physical playback, volume, power, Bluetooth, lighting and BassUp controls; holding BassUp for 5 seconds activates a 96 dB emergency alarm
- Mounting
- Detachable shoulder strap; designed to float upright. Maker rates immersion at 1.5 m for 30 minutes, drop resistance at 1 m and salt-spray resistance at 240 hours under ASTM G85-equivalent test conditions
- Size
- Approximately 21.0 × 8.5 × 7.8 cm; US maker lists 780 g, while the Japanese maker lists approximately 825 g including the strap
- Colours
- Adventurer Black, Deep Ocean Blue, Jungle Green and Brown on the UK store
- In the box
- Speaker, shoulder strap, USB-C to USB-C cable and quick start guide
Pros and cons
Pros
- IP68 protection and upright floating playback
- Stereo pairing with a second Boom 3i
- App EQ, lighting controls and a detachable strap
Cons
- No USB charging output for a phone
- No wired audio input
Closest rivals
Model | Type | Atmos | Connects by | Battery | Weight | Released |
|---|---|---|---|---|---|---|
| Portable speaker | No | Bluetooth | 24 h | 0.96 kg | Apr 2025 | |
| Portable speaker | No | Bluetooth | 24 h | 0.576 kg | May 2025 | |
| Portable speaker | No | Bluetooth | 14 h | 0.56 kg | Apr 2025 |
Sources
- soundcore.com/uk/products/d5100-boom-3i-waterproof-bluetooth-speaker
- soundcore.com/products/d5100-boom-3i-waterproof-bluetooth-speaker
- ankerjapan.com/products/d5100
- lp.ankerjapan.com/hubfs/aoos/manual/D5100QSG.pdf
- anker-in.com/posts/soundcore-launches-boom-3i-outdoor-speaker-with-floatable-de…
- soundguys.com/soundcore-boom-3i-review-the-best-waterproof-bluetooth-speaker-13…
Photo: cdn.shopify.com
