The kruger & matz Music Box Maxi KM0557 is a portable wireless speaker designed for mobile audio playback with Bluetooth 4.2 connectivity. Compact enough for transport yet built to deliver up to 10 W of audio power, this speaker supports MP3 format playback, FM radio reception and wired connections via AUX and USB. A rechargeable 3.7 V / 2400 mAh battery provides untethered use at home, outdoors or on the go, while the TWS function allows pairing two compatible units for wider stereo coverage.
Advantages
This model combines Bluetooth streaming, FM tuner and multiple wired inputs in a single compact housing, enabling flexible playback options from smartphones, tablets, USB drives or line-level sources. The rechargeable battery and micro USB charging keep operation portable and convenient. TWS pairing increases soundstage without complex setup, and the integrated microphone input supports basic voice or karaoke use.
Suitable for
- Casual home listening and background music in small rooms
- Outdoor and on-the-go use such as picnics or small gatherings
- Listening to FM radio or MP3 files from USB drives
- Temporary voice or karaoke setups using the mic input
Key specifications
- Output power: 10 W total
- Speaker configuration: 2 x 8" + 1" drivers
- Impedance: 3 Ω
- Frequency response: 80 Hz – 16 kHz
- Signal-to-noise ratio: 80 dB
- Bluetooth version: 4.2 with wireless streaming
- TWS function for pairing two speakers
- FM tuner range: 87.50 – 108.00 MHz
- Supported audio format: MP3
- Inputs: AUX (3.5 mm), mic input (6.3 mm jack), USB 2.0, micro USB charging
- Battery: rechargeable 3.7 V / 2400 mAh, power supply 5 V / 2 A
- Dimensions: 230 x 220 x 590 mm; Weight: 2850 g
How to use
Charge the speaker using the micro USB socket and a 5 V / 2 A power source before first use. For wireless playback, enable Bluetooth on your smartphone or tablet, select the device named for the speaker in the Bluetooth menu and start streaming. To play files from a USB drive, insert a compatible MP3-formatted USB stick into the USB port. For radio listening, switch to FM mode and tune to the desired station. For wired connections, use the AUX input or plug a microphone into the 6.3 mm mic jack. To expand stereo coverage, enable the TWS function and follow pairing steps to connect two compatible speakers.
Usage recommendations
Place the Music Box Maxi on a stable surface and avoid obstructing the speaker drivers to maintain sound clarity. Keep the battery charged for reliable portable use and use the TWS function for larger areas. For prolonged loud playback, monitor battery level and connect the speaker to external power when possible to preserve battery life.
