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.
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I always try to make Electronics Learning Easy.
Hello, How can I buy some of your pc boards?
Do you sell these in Kit form or sell the PC boards?
Circuit diagrams
Hi there, what is the potentiometer with a centralmtap.?
Does it have 4 connections per channel.?
I only know potmeters with 3 connections…
Thanks
Hello Ad,
Thanks for your visit. Yes, 4 terminal Potentiometer (per channel). It might be hard to find nowadays. I found here: https://amzn.to/3d01l5X
I try this diagram don’t work on my Amp. Very low sound almost no sound.
Hi, I just build the loudness circuit for my amp. It sound great. But I find that the bass is a bit too powerful. May I know what value to chance & where to change to reduce the bass a little? Thanks.
Hello Lum,
Thanks for your visit to my site.
I am sorry! This circuit is low sound output. Because it is without an amplifier circuit inside.
You may try other preamplifiers with control circuits.
https://www.eleccircuit.com/hi-fi-preamplifier-with-tone-controls-project-circuit/
https://www.eleccircuit.com/three-circuits-of-preamp-tone-controls-by-ne5532/
https://www.eleccircuit.com/tone-control-circuit-low-noise/