Microphone Condenser Pre Amplifier Circuit


Posted on Feb 6, 2014

This is a simple preamplifier circuit for electret condenser microphone. using a LM1458 dual op amp IC. The circuit takes the audio signal rom the condenser microphone and amplifier it, so you can use the microphone as the input to some device which wouldn`t normally accept microphone level signals. The circuit requires a 6-9 volt supply. Output


Microphone Condenser Pre Amplifier Circuit
Click here to download the full size of the above Circuit.

of the microphone amplifier can be made variable by connecting a 10k © potentiometer. Circuit`s gain can be increased by men perbesar the value of 47K, depending on the input sensitivity of the main amplifier system. The microphone should be housed in a small round enclosure.




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