5 Channel Stereo Tone Control or Graphic Equalizer Schematic Circuit Diagram

To build a 5-band stereo graphic equalizer, five stereo "slide potentiometers" are used, but a rotary potentiometer is used here; only for this reason should it be called a 5-channel tone control. You can build a five-channel graphic equalizer by following the circuit diagram below.

• Reckless Bass Boost Capacity
• Smooth bass, controlled sound
• Excellent Midrange Frequency Audio Controller
• World-famous audio equalizer design

Project Name: 5 Band Graphic Equalizer or 5 Channel Audio Tone Controller.

Sanyo, a Japanese company, makes an audio graphic equalizer using the LA3600 IC. The internal schematic circuit inside that IC uses 5 NPN transistors and an operational amplifier (op-amp IC 4558). This schematic circuit diagram I designed follows that circuit diagram strictly. I have built many commercial graphic equalizers with this schematic circuit diagram.

This graphic equalizer's performance is unique, with crystal-clear sound quality and excellent tone-controlling capacity. The LA3600 IC is a monophonic graphic equalizer IC, so two ICs are used in the stereo sound system. To make this five-band graphic equalizer with transistors, you need to make a board with ten transistors; that is, you have to make a double circuit on a PCB (for a stereo graphic equalizer or tone controller).

Related Article: Low Noise Microphone Preamplifier Circuit Diagram

5 Channel Audio Tone Control Board Specifications

• Operating Voltage: Dual Power +12V GND -12V, or +18V GND -18V
• Control Frequencies: 108Hz, 334Hz, 1KHz, 3.43KHz, 10KHz

5 Channel Stereo Tone Controller Schematic Circuit Diagram Using Transistor and 4558 IC

5 Channel Stereo Audio Tone Control Board Using 10 Transistors & 4558 IC:
The figure below shows a schematic circuit diagram of a five-band graphic equalizer or five-channel tone controller. It requires ten C2120 or BC547 (or equivalent NPN transistors) and a 4558 dual op-amp IC.

This schematic circuit diagram is a high-performance graphic equalizer or audio tone control. Its high-pass filter, low-pass filter, and two more categories of mid-range audio frequency control capabilities are unmatched and of very high quality. This graphic equalizer's Bass Boost system and Treble control are fantastic.

Components List

Transistors & IC:
• Q1 to Q5 = C2120 NPN Transistor (or equivalent)
• U1 (A & B) = 4558 Dual Op-amp IC

Resistors:
• R1, R2, R3, R9, R10, R11, R12, R13 = 4.7KΩ
• R14, R15, R16, R17, R18, R19 = 68KΩ
• R4, R5, R6, R7, R8 = 1.2KΩ
• R22 = 10KΩ
• R20, R21 = 470Ω (for ±12V Dual Supply) / 1.2KΩ