1 Input – 4 Outputs Stereo Audio Splitter

This 1 Input – 4 Outputs Stereo Audio Splitter has a single input and 4 independent outputs, each amplified with an operational amplifier configured as voltage follower. Each operational amplifier (Op Amp) has the advantage of its high input impedance and low output impedance, thus avoiding distortion in sound.

The output electrolytic capacitors are used to prevent the continuous current component from the output of the operational amplifier from being transferred to the load. A control potentiometer is used to vary the output level of the audio signal, in each of the 4 outputs (volume).

In order to build a complete stereo system, you must make two circuits equal to the following diagram.

List of components of the 1 Input – 4 Outputs Stereo Audio Splitter

• 2  LM324 or TL084 ICs (4 operational amplifiers in a single package)
• 8  100k resistors (R)
• 8  1uF / 25 volt electrolytic capacitors (C)
• 8  50K potentiometers (P)

LM324 Quadruple Operational Amplifier Pin out

To power the circuit you need a dual polarity output power supply (+/- 12v). +12V must be connected to Pin 4 and -12V must be connected to Pin 11 of the LM324. See the above image.