CGS/Serge Resonant EQ Mk. II

Hate to sell this extremely rare Filter bank but there's always more bills to pay.
This is a collaboration between a whole host of modular synth legends including Serge Tcherepnin, Ken Stone, Negativespace, and Clarke) to create one of the most interesting modules NOT available anywhere.

Not only that, but this module has been professionally built with only the highest quality components including all Polystyrene Capacitors.

This special MKII version features individual outputs for every band, dual high and low comb outputs and two main outputs. Besides simply Eq'ing, this filter can also make the craziest feedback loops I've ever heard (there's plenty of demo's on google it if interested).

Thanks for looking!

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CGS Serge Resonant Equalizer. PCB by Ken Stone. Mk. II daughterboard by Negativespace. Mk. II panel by Clarke.

The RESONANT EQUALIZER MKII (EQ) is a unique ten-band filter designed specifically for electronic sound synthesis and processing. Except for the top and bottom frequency bands, the bands are spaced at an interval of a major seventh. The Resonant Equalizer is designed to produce formant peaks and valleys similar to those in acoustic instruments.

There are three equalized outputs: the two COMB outputs provide the sums of the two alternate filter bands, while the two top outputs are the (identical) mix of all filter bands. Please note that there is no sharp separation between the bands, moving any frequency knob will have an influence on both COMB outputs. This equalizer is special in that the bands can be set to be resonant: when the knobs are in the middle position, the response at the main EQ Output is flat. When the knobs are positioned between the 9 and 3 o’clock position, up to 12 db of boost or cut is set at the band. If the knob is set beyond the 3 o’clock position, the band will become resonant, simulating the natural resonance of acoustic instrument formant structures. Below the 9 o’clock position, increased band rejection is achieved.