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this video is about diy low pass filter for pam8403 mini amplifier. btw if you don't find the exact value of the resistor I used to this video tutorial. it's ok to use a single 10K resistor on the signal input of the pam8403.
My DIY low pass filter components.
4 pcs 560 ohm Resistor
1 Pcs 4.7K ohm Resistor
3 Pcs 50V 1uf Capacitor
1 Pcs 16V 470uf Capacitor