If your main amplifiers. But the sound is not clear as low treble and little bass. We offer an easy way. Using less equipment. You create a very simple
Audio loudness control circuit used to add bass. More during the normal listening levels.
It is a passive circuit and does not use the power supply.
When the input signal into. Switch S1 is an option to use open (ON) using loudness control. Off (OFF) to use a bypass. When the switch S1 to the ON position the signal will flow through C1(0.001uF), C2(0.01uF) and R1(2K). This will serve as a low pass filter circuit.VR1 is adjusted by the strength of the signal to the output.VR1-100K Linear Potentiometer, which uses the volume type with a central bar (Center Tap) only. The output of the circuit will be connected to the region to pre-tone next step.
Note: All capacitors use Ceramic Capacitor or Mylar Capacitor them low cost
How to build
This circuit has a few components so you can builds easily as Figure 2 make PCB layout and putting all components on PCB and connecting to your audio system.
Figure 2 The PCB and components layout of this projects.