This really is ten band graphic equalizer for 1 channel (mono) audio program. You will need build 2 similiar circuits for 2 channel (stereo) audio method. This equalizer construct depending on TL074 low sound JFET op-amp that will give you top quality audio output.
Graphic Equalizer Schematic 10 band Mono Part List:
| ....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 |
