Minimum Voltage required for this circuit 6 volt and maximum voltage 18 volt . Its can use to amplifier on the electronic devices such us Radio , DVD , MP4 , MP5 , and etc. To amplify the signal sound to audio sound , If you want to bring amplfier you can use the 6V rechargeable battery is able to turn it. What use the rechargeable battery ? because with rechargeable battery when battery runs out , you can charge back.
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Maximum output power 10 Watt with impedance 4 ohm. The circuit is mono amplifier. You can use the circuit to car amplifier because support to low power subwoofer speaker