Wiring Diagram

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6 BAND GRAPHIC EQUALIZER CIRCUIT USING 741 OP-AMP SCHEMATIC DIAGRAM

The audiblefrequency spectrum is covered in six steps: 50Hz, 160Hz, 500Hz, 1.6kHz, 5kHz, 16kHz. All potentiometers are of 100kO linear type. The circuit provides adequate boost / cut for normal use.

power supply for the circuit can be derived from the amplifier / preamplifier itself. The wide rangeof supply voltage (6V-20V) makes the circuit very versatile. Power consumption is negligible.

list Component

R1,R2,R3,R4,R5,R6 : 27kO     C1: 100n      C6: 300pF
R7:  470kO                   C2: 33n       C7: 100uF/16V
R8:  330kO                   C3: 10n       C8: 4.7uF/16V
R9:  100kO                   C4: 3.3n      C9: 47uF/16V
R10: 4.7kO                   C5: 1n        IC1: 741 Op amp
R11: 4.7kO
VR1,VR2,VR3,VR4,VR5,VR6: 100kO Linear Potentiometers