The M5226 integrated circuit is manufactured by Mitsubishi electric and is specially designed for graphic audio equalizer .  The M5226 graphic audio equalizer integrated circuit has an 5 element resonance circuits with transistor system and output op amp .

The M5226 graphic audio equalizer circuit supports a wide range of input voltage , from 4v up to 20 volts and can be used in high variety of audio applications .This equalizer circuit is ideal for low cost applications , requiring few external components . The frequency of each resonance circuit is modified using a variable resistor . The frequency of the resonance circuit can be calculated using this formula .

This circuit is a mono equalizer and the output signal is at the pin number 13 .
This equalizer need to be powered using a 9 volts DC power supply circuit .