5 thoughts to “Monobox Ammunition Can Amplified Speaker”

    1. Hi davi, are you referring to the power switch? It’s a double pole switch that allows power from either the external supply or the battery to pass through to the circuit. When it’s switched to external power and there is no adapter plugged in, then the amp is turned off. Does that help?

  1. please send me component list and and step by step procedure
    i am from india and i really want to make this and please send me images

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