It is the "Widening" (Mid/Side) version of the Triple EQ shapeable filter/equalizer.
Blue Cat's Widening Triple EQ is the "Widening" (Mid/Side) version of the Triple EQ shapeable filter / equalizer: it is a three bands real time semi-parametric mid/side equalizer.
The plugin provides instant visual feedback of your settings thanks to the included graph. The overlayed controls lets you shape the filter easily. The mid and side channels responses can be linked together in multiple ways (with a mirroring capability) for easier balance of frequencies.