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[Others] Can I connect 0.5W speaker with 3W amplifier directly?

I am going to make an arduino project which uses a 0.5W speaker, attached to PAM8403(3W amplifier). Can I directly connect them or should I use a resistor?
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[Others] Do anyone know how to make this amplifier run on battery

This amp run on 12-24v ac。
  • answered Aug 06,2020
    by Joson
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