ERHIndia 5v Mini Amplifier Board PAM8403 2 *3W Class D 2.5V to 5V for DIY Kits Electronic Components Electronic Hobby Kit
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PAM8403 Super Mini Digital Amplifier Board 2 * 3W Class D Digital 2.5V to 5V Power Amplifier Board Efficient The amplifier board is what actually amplifies the audio signal and drives the speaker. By increasing the voltage of the signal, the amount of current passing though the speaker increases, which makes the speaker louder.
