Categories: Mixer

Simple Mixer 4 Input

Here the simple mixer circuit with 4 inputs and 2 operational amplifier (op-amp) modules:

A basic mixer suitable for mixing microphones or even effects outputs. The overall gain from input to output is one if the pot related towards the input is full up. You can make this a net gain of ten (or any other reasonable gain) by reducing the input resistor towards the second op amp. 10K in this position gives a gain of ten, or 20db. In case you are mixing effects outputs that have an output level control constructed into them, you are able to dispense using the input level controls, or make some have level controls, some not. Each channel use a potensiometer to adjust the volume level of each channel. Audio taper potensiometers are possibly much better, but linear will do the job.

For the op amps, choose a JFET input dual or singles, such as from the National Semi LF3xx series, or something such as the TL072 or TL082. This circuit operates with 9V power supply.

Download the schematic diagram Simple Mixer 4 Inputs circuit in PDF document:

circuit diagram

Recent Posts

Power Amplifier 45W Using uPC 1230 + Pre Amp Head uPC 1032

This is the circuit diagram of power amplifier 45W using power uPC 1230 as the…

55 years ago

Horn and Lamp Flasher Circuit for Car Reversing Gear Mode

The Horn Circuit This is a basic circuit of car horn and lamp flasher that…

55 years ago

Alarm Circuit for Drinking Water

This is the circuit diagram of drinking water alarm based a small water sensor by…

55 years ago

200W MOSFET Amplifier based IRFP250N

Here is the 200W MOSFET amplifier powered based on four piece of IRFP250N, they are…

55 years ago

300W RMS Stereo Power Amplifier based IC TDA7294

This is the 300W RMS stereo power amplifier circuit project. This amplifier is based four…

55 years ago

Stereo Tone Control with Line In + Microphone Mixer

This is an active stereo tone control circuit using very well known op-amp IC of…

55 years ago