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Operating voltage: DC 5V-12V
Operating current: 1mA (static) ~ 150mA (max);
Output speaker impedance: 4 Ω-32 Ω(impedance high-sound, high efficiency);
Support the speaker power: 0.5W-25W
Output power: 750mW (max)
Input support: electret, microphone, condenser microphone, moving coil microphone, audio signal.
Volume: 22.7 (L) * 13.5 (W) * 7.4 (H) mm;
Description:
Using as microphone preamplifier performace is very good, noise and AC ripple is very low, the output signal voltage greater than 1V or more, to promote the power amplifier signal strength. Amplifier board IN and GND use shielded cable access electret microphone, access to the attention of the polarity, the electret after the reverse will be very little or no sound. Amplifier OUT board connected speakers, speakers away from the microphone, in order to avoid self-excited noise. Power amplifier board positive and negative access 5 ~ 12V DC power supply, please do not reverse, otherwise it will burn out the module. Amplifier board comes with a volume trimmer potentiometer, if you feel the sound is too large or too small can try to adjust.
Package included:
3* Super Mini Electret Amplifier boards DC5-12V
AP
Reviewed in the United States on February 26, 2025
These are working as advertised. Another review mentions there is no knob on the attenuator. THey shouldn't be a knob on a device like this.
Customer 12345
Reviewed in the United States on August 8, 2023
They work but introduce a good bit of noise. Out of the 3 1 was extremely noisy.
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