2PCS Adjustable Mini LM386 Audio Power Amplifiers Home Board Micro Amplifier Module Max 750MW High Efficiency DC 3~12 V 5V

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2Pcs Adjustable Mini Amplifier LM386 Audio Power Amplifiers Home Board Micro AMP Module Max 750MW High Efficiency DC 3~12 V 5V Operating voltage: 3V-12V (voltage below 4V will significantly reduce the sound, the maximum can not exceed 15V) Used to do the microphone pre-amplification is very good, very low noise and AC ripple, the output signal voltage greater than 1V or more, to promote the post-amplifier signal value is very strong. Output volume can be fine-tuning range: 0 ~ 100%, on-board only fine-tuning potentiometer, the conventional volume can be directly adjusted by the source control. Support the speaker power: 0.5W-25W (In fact, any power speaker can be used, the volume and the speaker power is not much relationship, as long as greater than the amplifier output rating on the line, a large speaker sound may be larger); Output speaker impedance: 4Ω-32Ω (impedance high-sound, high efficiency); Operating current: 1mA (static) to 150mA (max);