Bass booster circuit diagram
This bass booster circuit is made using the quad op-amp ic LM324. This op-amp ic has 4 operational amplifiers, but in this circuit, only 2 op-amps are used. This circuit provides Low low-pass filter of input audio, which produces a Low frequency of input and blocks high frequencies.
Connect the circuit as the diagram below. Give input through the 47K resistor at pin no 2, another 47 K resistor is connected between pin 1 and pin 2. Pin 1 is the output pin of 1st op-amp, and this output pin is connected with the 2nd op-amp’s input inverting pin 6 through resistors and capacitors. Pin no 4 is connected with +9v supply. Pin 11 is connected with -9v and connect the ground with the given terminals in the diagram. Use a dual power supply for the operation of this circuit.RV1 is a 100k preset for adjusting the level of frequency. Pin no 7 is the output of 2nd opamp, and this pin is used in this circuit as the output also. The output must be connected to the amplifier input.
Schematic diagram
Dual power supply Schematic diagram
