Rangkaian Pre-Amp Mic 2 Transistor.

Here is a Pre-amp microphone dynamic using two transistors. The circuit factor of this around 150 and can handle signals from 50Hz to

Rangkaian Pre- Amp mic 3 input - lm741

This is a 3 input mic mixer circuit using IC LM 741. Four 741s are used here. IC1, IC2, IC3 are used as preamplifiers. They produce a gain of around 40 decibel to the individual input signals.

Rangkaian Audio Mixer 3 Input

Many audio mixer circuits have been published but this this very simple audio mixer circuit uses only one transistor. The base emitter junction of the transistor is biased by the diodes D1 and D2.