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This is a DIY module based on the Serge Resonant EQ. This particular build uses a CGS 202 PCB, a daughter board from Negativespace, and a panel designed by Clarke Robinson. It's an expanded version of an earlier design, adding individual outputs for each frequency.
It's a fantastic module and a relatively easy and incredibly fun DIY project. I completed my first one after building just a few other projects and the hardest part of it all was sourcing some of the components. I built mine using OP275 op amps and polystyrene caps (some values are hard to find) in the signal path.
I mostly use this for processing drums and creating feedback loops. The sound of this module is incredible.