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Automatic Switch For Audio Power Amplifier

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bodrum48

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The circuit uses stereo preamplifier output to detect the presence of audio to switch the audio power amplifier on only when audio is present
 

Verba

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The problem is, you can never use your stereo amp as differential power amp as soon as the circuit is connected, it will keep it constantly off.
By the way, if your power amp class B or AB it doesn't take much power, it's only usefull with class A
 

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