Features:
Used for microphone preamplifier, good effect, low noise and ac ripple, output signal voltage greater than 1V or greater, improve the power amplifier signal strength.
Stable performance, strong signal reception.
Wide voltage input, can work in long time.
The amplifier board is equipped with a volume trimmer potentiometer. If you find the sound too loud or too small, you can try to adjust it.
Suitable for Xiaomi balance scooter.
Specification:
Condition: Brand New
Material: Electronic board components
Color: as picture shown
Power: 3W
Working voltage: 5V
Voltage: 5V 45V
Output: Stereo 4 Ohm 3W
Working current: 1mA (static) 150mA (maximum)
Output speaker impedance: 4 Ohm 32 Ohm (impedance high, high efficiency)
Support speaker power: 0.5W 25W
Size: approx. 5x3.5cm 2x1.4inch
Package List:
1 x Bluetooth Board with Speaker
Note:
1. The amplifier board is connected to the electret microphone by shielded cable between the ground and the amplifier board. When connected, pay attention to the polarity. When the electret is reversed, there will be little or no sound.
2. Amplifier external speaker, speaker away from the microphone to avoid noise.
3. Power amplifier board positive and negative access to 5 12V DC power supply, please do not reverse, otherwise it will burn out the module.
4. The amplifier board is equipped with a volume trimmer potentiometer. If you find the sound too loud or too small, you can try to adjust it.
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