This EQ was originally designed as a variation to the standard three and four band console EQs. It bears the same all discrete signal path and proportional Q design of the EQ PA and EQ PB modules but uses a ten band graphic approach instead of the semi-parametric three and four band design of the other modules.
This results in several differences, but still a killer sound.
The core circuitry that this module was based on is still the custom op amp like its parametric brothers. So the same sonic character is retained here, but the graphic approach makes it quick and easy to dial in a particular shape, which is clearly shown by the ten vertical sliders.