These are the passive tone control circuit. You can adjust audio both bass and treble without increasing the signals at output.
We use only basic components R and C. They perform filter low or high frequency.
It is easy to build and cheap. We do not need to use any power supply. Next, its output can be increased more power with a power amplifier immediately.
Simplest tone control circuit
See in the circuit below. It is simplest tone control circuit. We can adjust bass and treble easily with rotate VR1 and VR2 to control the tone of music.
Better quality passive tone control circuit
For bass-treble tone control that has better working. It is designed by Mr Grommes. Use more R and C devices. As shown in the general standard circuit in the figure below.
The value of components in the circuit. They may be increased or decreased according to individual tastes who like the bass-treble of the music differently.
- Capacitor C1 and C2 and resistor R2 affect the bass. If the C2 value is used more. For example from 0.068uF to 0.1uF. And reduce R2 down from 1.5K to 1K will increase the bass level.
- Increasing or decreasing C3 and C4 will affect the treble signal more or less, respectively. As shown in the circuit figure below. Which is the same circuit But the level of the equipment is different.
Not only that see other passive tone control circuit below.
Make a passive tone control circuit
See the circuit that you can use it works well.
How it works
When we feed a input signal to input of the circuit. The sound signal will come in to separate in 2 the ways.
The first way will via to a low pass filter. It includes R1, C1, C2, and R2. And it has the VR1 be adjusted the low frequency ratio gain or the bass.
The second way a signal will come to a high pass frequency filter section. They include C4, R5, C5, and VR2 be adjusted the value of
high frequency or treble.
The signal from both low and high pass frequency filter flow through R3 and R4 to the output.
Then, have C3 cleans the noise signals goes out away.
The Shopping list
0.25W Resistors, tolerance: 5%
C1,C2: 0.015µF 50V
C4, C5: 0.0015µF 50V
C3: 680pF 50V
VR1, VR2: 100K
See also, you may like these circuit too.
- Super pre tone control project using LF353
- Bass Treble Tone control circuit diagram
- 3 Tone control circuits using op-amp NE5532
- Active Bass Booster circuit using 741
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13 thoughts on “Passive tone control circuit”
nice grammar keep it up!
How should I connect this for a quad amplifier circuit?
Thanks for your visit. How are you?
This circuit is very simple circuit. But it may low signal output. If you use a main power amplifier. It cannot drive high amplifier.
You may use other circuits with preamplifier circuit. For example:
Can I connect this input to the 3.5mm audio jack and the output to the input of the amplifier circuit?
You may try it. I think it is low sound but you may like it for small amplifier.
If you get a good sound. Please tell me again.
I like to help you.
VR should be LIN or LOG ??
Thanks for help !!!
You should use LIN or 100K(B) Potentiometer.
Are Linear potentiometers not normally marked (A)?
Hello Bent Arnoldsen,
Thanks for your visiting my site.
Yes, You can use the potentiometer type B for bass and treble.
But at volume, should be typed (A). Because the volume of the sound can be adjusted more smoothly.
Have a good day
could you please double check your shopping list?
there is a difference between the values of capacitors in the shopping list and the last figure.
For example, in the figure the value of C1 and C2 is 0.15uf and C4 is 0.0015uf but in the shopping list you said that C1=C2=C3= 0.015 uf.
Thank you in advance.
Thanks for visiting my site.
Oh… I am sorry for the shopping list mistakes.
Have a good day.
Can you tell what low and high frequencies are affected with this circuit?