Amplifier 5V PAM8403 variable

PAM8403 is a small digital amplifier chip, high-definition digital sound chip highlighting strengths, the circuit uses the most reasonable peripheral configuration, power supply filtering is upgraded to 470uf (some sellers are not to even have 100uf capacitor) 1.6mm glass sheet, the real amplifier board to do the most detailed, high-fidelity sound output 3W +3 W is the power amplifier enthusiasts rare good product, potentiometer using the original anti-meter body, life expectancy up to 15 years, a potentiometer with the switch off the power can be directly counter-clockwise.