This is a project of a low noise mic preamp with NE5534 IC. NE5534 is a low noise opamp IC manufactured in 8 pin dip package and designed to use in audio equipments and instruments. It has many good built in features which are minimum distortion, low noise, short circuit protection, very low external parts etc.
In the place of microphone you can connect the circuit with any audio source. The circuit is ideal to use where a low noise and good quality audio preamplifier is required. The operating voltage of the circuit is 9 to 12V DC.