The EarFun UBOOM L is a portable Bluetooth speaker with 2 × 14 W of output, IP67 protection and a stated battery life of up to 16 hours. Alongside wireless connectivity, it has a 3.5 mm AUX input and supports stereo pairing with a second UBOOM L.
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Dimensions, design and durability
The speaker measures 210 × 78 × 72 mm and weighs approximately 650 grams. Its size makes it easy to carry in a bag and use at home or outdoors.
The IP67 rating means the speaker is dust-tight and protected against temporary immersion in water: the standard specifies a depth of up to one metre for a maximum of 30 minutes. It does not mean unlimited protection against immersion or resistance to all liquids. The UBOOM L is also designed to float, which can be useful when using it near water.
Sound and bass technology
Two 55 mm dynamic drivers deliver 2 × 14 W of output. They are accompanied by passive radiators on the sides, which help reinforce low frequencies. These are intended to support bass at higher volumes while limiting distortion.
JumboBass technology uses proprietary digital signal processing (DSP) and dynamic range control. It is designed to boost bass while preserving vocal clarity.
Indoor, Outdoor and Video modes
The UBOOM L offers three modes for different listening situations:
- Indoor focuses on balanced, clear sound indoors.
- Outdoor emphasises power and bass to make the sound easier to hear in open spaces.
- Video Mode adjusts the sound for watching video, with an emphasis on dialogue and spatial effects.
Battery and charging
The 7.4 V battery consists of two 2,600 mAh cells. Stated playback time is up to 16 hours; actual battery life depends on how the speaker is used, including the volume level.
Charging is via USB-C at 5 V and 3 A and takes approximately four hours. Charging time may vary depending on conditions and the power supply used.
Bluetooth, AUX and stereo pairing
The speaker uses Bluetooth 5.0 in the 2.402–2.480 GHz frequency band. Its stated range is up to 15 metres without obstacles; walls and other obstructions can reduce it.
The supported A2DP and AVRCP profiles are used for music playback and playback control, while HFP and HSP support hands-free communication. A connected device, such as a phone, is needed to make calls. As an alternative to Bluetooth, the 3.5 mm AUX input allows a compatible audio source to be connected by cable.
Two EarFun UBOOM L speakers can be paired in stereo. This separates the left and right channels and provides a wider soundstage than a single speaker.
The UBOOM L combines a portable design and dust and water protection with features for use at home and outdoors. When considering it, bear in mind that both battery life and Bluetooth range depend on usage conditions.
