Wiring Schematic Diagram

This bass and treble tone controller circuit is based on the classic Baxandall tone control circuitry and provides a maximum cut and boost of around 15dB at 10kHz and 100Hz. Since the Baxandall tone control circuit is a passive design, all frequencies are amplified. The position of the bass and treble control potentiometers and reactance of the capacitors affect the audio response.

The circuit up there is very popular Baxandall tone control configuration circuit. This Baxandall tone control has unity gain (gain=1) at midband and uses standard linear potentiometers. Low value, low cost, and small size capacitors is possible to apply because of the very high input impedance of CA3140. The frequency point is set at 100Hz and 10KHz by 15dB bass treble boost and cut. Full peak to peak output is available event at 20KHz because of excellent high slew rate characteristic of this opamp. The gain of this amplifier is decreased -3dB from flat response at 70KHz, and it’s beyond audible frequency range to make sure this tone control circuit handle the audio range perfectly.

Here is a LM1036 stereo tone control circuit which build based on IC LM1036. This circuit will controll bass/treble level tone, volume and balance between right channel and left channel (input 1 and 2 ). You may use this circuit for stereo applications such as car radio, TV and audio systems, mp3 player, dvd player, ipod and more. An additional control input allows loudness compensation to be simply effected. The circuit should be works with supply voltage 9V to 15V DC.

Each tone response is defined by a single capacitor chosen to give the desired characteristic. By changing the values of capacitor connected to tone controlling unit, you can control bass and treble levels. pin 3 and pin 18 of IC are for treble and pin 6 and pin 15 for bass.

LA3600 graphic equalizer circuit shown here. This circuit very suitable for applications like portable stereo, radio sets, home theater systems, car audio systems etc.

In the circuit capacitors C1, C3, C5, C7 and C9 are used to fix the resonance frequency of the corresponding bands. Capacitors C2, C4, C6, C8, C10 and C15 are the input capacitors and increasing the value of these capacitors will increase the low frequency response. Capacitor C13 is a decoupling capacitor and C14 is a power supply filter circuit. C12 is the output capacitor and resistor R6 limits the supply current. Gain of each band can be adjusted by using the corresponding potentiometers R1 to R5

Here is the circuit of 3 band tone control using a single op-amp IC and few components. The IC used here is LF 351 which is a wide bandwidth single JFET operational amplifier.

The high input impedance of the IC makes this circuit compatible with most of the audio signal sources. The op-amp is wired as an inverting amplifier. The input signal is fed to the inverting input of the opamp via the filter network. The filter network can produce a +/- 20 dB enhancement or cut on the three frequency bands 50Hz,1KHz and 10KHz.POTs R1, R2 and R3 can be used for adjusting the gain of the different bands