Wiring Diagram

As shown in the diagram, there are 10 same units that only differ in capacitance values of capacitors which determine the frequency band of each filter. The potentiometers adjust the predetermined regions of frequency in each unit.

The components must be high quality and have low tolerance, Specifically potesometer RV1... the 10 and capacitors.. The resistors must be metal-film type.

If it is intended for stereo use then it will be supposed it is made in two pieces with as much as possible suited the materials, between the channels, so that do not exist differences in the regulation of each band frequencies.

Switch S1 isolates the circuit EQ, when him we did not need and it ensures level [ flat ] response in the exit of circuit. The circuit should be connected between preamplifier and in a final power amplifier.

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

10-Band Graphic Equalizer Circuit Diagram, As shown in the diagram, there are 10 same units that only differ in capacitance values of
capacitors which determine the frequency band of each filter. The potentiometers adjust
the predetermined regions of frequency in each unit.

The components must be high quality and have low tolerance, Specifically potesometer RV1.
the 10 and capacitors. The resistors must be metal-film type.

If it is intended for stereo use then it will be supposed it is made in two pieces with as
much as possible suited the materials, between the channels, so that do not exist differences
in the regulation of each band frequencies.