10 Band Graphic Equalizer

10 Band Graphic Equalizer circuit diagram
This is 10 band graphic equalizer for one channel (mono) audio system. You need build 2 similiar circuits for 2 channel (stereo) audio system.

This equalizer build based on TL074 low noise JFET op-amp which will give you high quality audio output.

Part List
R1....20= 10Kohms C4= 10nF polyester C18= 68pF polysterine
R21....40= 1Mohms C5= 47nF polyester C19= 360pF polysterine
R41= 10Kohms C6= 4.7nF polyester C20= 36pF polysterine
R42= 1Kohms C7= 22nF polyester C21= 4.7uF polyester
R43.....52= 2.2Kohms C8= 2.2nF polyester C22-23= 33pF polysterine
R53.....62= 47Kohms C9= 12nF polyester C24= 10uF 25V
R63-64-66-67= 47Kohms C10= 1.2nF polyester C25-26= 47uF 25V
R65= 10Kohms C11= 5.6nF polyester C27...32= 47nF polyester
R68-69= 47 ohms 1/2W C12= 560pF polysterine IC1...3= TL074
RV1....10= 100Kohms lin FADER C13= 2.7nF polyester S1= 2X4 SW for stereo
RV11= 10Kohms log. C14= 270pF polysterine
C1= 180nF polyester C15= 1.5nF polyester
C2= 18nF polyester C16= 150pF polysterine
C3= 100nF polyester C17= 680pF polysterine


3 comments:

  1. Stephen CornfordApril 9, 2009 at 11:27 AM

    This looks great:

    where can I find the values for the components and the codes for the ICs?

    ReplyDelete
  2. AnonymousApril 9, 2010 at 7:36 AM

    how do i need to arrange it to couple the 2 circuits ? for having a stereo equaliser ?

    ReplyDelete
  3. UnknownApril 5, 2011 at 4:53 PM

    I think you need to change your font color from white to black or something that will be seen clearly. The parts list is white like your back ground.

    @Stephen
    All you need to do Steph is highlight the font with your mouse and it will show up. :)

    ReplyDelete