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Amplifier - Make Bluetooth, USB and FM Amplifier at home

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Amplifier - Make Bluetooth, USB and FM Amplifier at home 4440 ic board full wiring video - ------------------------ Components - 1. Melamine Board MDF 2. 4440 dual ic board 3. Bluetooth module 4. Potentiometer ( 47K, 100K × 2) and knob 5. Switch × 2 6. Power socket 7. Speaker socket 8. Audio input socket 9. Cooling fan 10. Green LED and 1k Ohm resistor 11. Power supply 12. Subwoofer and speaker 13. Sticker -------------------------------

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