Stereo Tone Control Circuit uses TL084/ TL074

This is a Stereo tone control circuit using stereo ic op-amp TL084 or also can use TL074, for recommendation i recommend to use IC TL084, Where the ic has the following features.

Operational amplifier TL084 JFET features:

• Low Power Consumption: 1.4 mA/ch Typical

designed to offer a wider choice than anything else

• Wide Common-Mode and Differential Voltage

previously developing an operational booster family. Range Each of these JFET input amplifier amplifiers 

• Low Current Input Bias: 30 pA Typical combining JFET and bipolar transistors with high voltage that fits well in monolithic integrated circuits. 

• Low Current Input: 5 pA Typical The device displays low-level low slew, low input bias 

• Short Circuit Protection Output and offset current, and low offset voltage 

• Lowest Harmonic Distortion: 0.003% Typical temperature coefficient.

This tone control circuit has good quality, can be used in audio hi-fi amplifier. To get a good sound quality is also required components that meet the requirements and the same with the circuit below

Stereo Tone Control Circuit Diagram:

Part List & Description:
Resistor:
R1= 5K6 1/4W
R2= 22K 1/4W
R3= 10K 1/4W
R4= 10K 1/4W
R5= 5K6 1/4W
R6= 22K 1/4W
R7= 10K 1/4W
R8= 10K 1/4W
R9= 22K 1/4W
R10= 68K 1/4W
R11= 8K2 1/4W
R12= 8K2 1/4W
R13= 10K 1/4W
R14= 4K7 1/4W
R15= 4K7 1/4W
R16= 22K 1/4W
R17= 22K 1/4W
R18= 22K 1/4W
R19= 68K 1/4W
R20= 8K2 1/4W
R21= 8K2 1/4W
R22= 10K 1/4W
R23= 4K7 1/4W
R24= 4K7 1/4W

Potentiometer
RV1, RV2= 50K Pot Bass Set
RV3, RV5= 50K Pot Mid Set
RV4, RV6= 50K Pot Treble Set
For volume setting u can add before input

Capacitor
C1= 1uF 50V Radial Electrolityc/ Audio Grade Cap
C2= 22pF Ceramic
C3= 1uF 50V Radial Electrolityc
C4= 56N MKP/Ceramic
C5= 56N MKP/Ceramic
C6= 1uF 50V Radial Electrolityc/ Audio Grade Cap
C7= 22pF Ceramic
C8= 1uF 50V
C9= 56N MKP/Ceramic
C10= 56N MKP/Ceramic
C11= 4N7 Ceramic
C12= 10N Ceramic
C13= 2N2 Ceramic
C14= 4N7 Ceramic
C15= 10N Ceramic
C16= 2N2 Ceramic

Integrated Op-Amp Circuit
U1= TL074, TL084 Operational Amplifier

Connector
J1= Audio Input L
J2= Audio Input R
J3= Audio Output to Amp L
J4= Audio Output to Amp R
J5= +15 VDC
J6= -15 VDC
Ground

Power Supply Circuit Diagram for Stereo Tone Control:

Part List & Description:
Resistor
R25= 1K 1/2W
R26= 1K 1/2W

Capacitor
C17= 2200uF/ 50V Radial Electrolityc
C18= 2200uF/ 50V Radial Electrolityc
C19= 220uF/ 25V Radial Electrolityc
C20= 220uF/ 25V Radial Electrolityc
C21= 100uF/ 25V Radial Electrolityc
C22= 100uF/ 25V Radial Electrolityc
C23= 100nF MKP
C24= 100nF MKP

Diode
D1= 1N4007/ 1N4002
D2= 1N4007/ 1N4002
D3= 1N4007/ 1N4002
D4= 1N4007/ 1N4002
D5= 15V Zener 1W
D6= 15V Zener 1W

Transistor
Q1= TIP31/ TIP41
Q2= TIP32/ TIP42

Conector & Misc
J7= Main AC 220V input
J8= To +15 VDC Tone Control
J9= To -15 VDC Tone Control
TR1= Stepdown Transformer 220V to 15VAC/ 20VAC

For DIY'ers I also share the PCB Layout include power supply circuit to make it easier.

PCB Layout Design

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Finished Stereo Tone Control

*Good Luck