CGS202 Serge Resonant Equalizer (1U)

Multi-band equalizer with unique frequency spacing

One of the most sought after modules ever produced the Serge Resonant Equalizer is now available in classic MU format! The CGS202 Serge Resonant Equalizer offers the unique major-seventh band equalization setting itself apart from standard graphic equalizers and opening the door for interesting sonic possibilities.

To quote the 1982 catalog:

The RESONANT EQUALIZER (EQ) is a unique tenband filter designed specifically for electronic sound synthesis and processing. Except for the top and bottom frequency bands, all other bands are spaced at an interval of a major seventh. This nonstandard spacing avoids the very common effect of an accentuated resonance in one key, as will be the effect from graphic equalizers with octave or third octave spacing between bands. Spacing by octaves will reinforce a regular overtone structure for one musical key, thereby producing regularly spaced formants accenting a particular tonality. The Resonant Equalizer’s band spacing are much more interesting, producing formant peaks and valleys that are similar to those in acoustic instrument sounds.

There are three equalized outputs, two which mix the alternate filter bands, and one which is a mix of all filter bands. The upper (up arrow COMB) lets pass the outputs of frequency bands at 61 Hz, 218 Hz, 777 Hz, 2.8 kHz, and 11 kHz. The lower (down arrow COMB) mixes the other bands (29 Hz, 115 Hz, 411 Hz, 1.5 kHz, 5.2 kHz). This equalizer is different from other equalizers 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

Both the 1U and 2U versions of our CGS202 Resonant Equalizer feature identical electronics, potentiometers and jacks. The only difference between versions is the panel width and the size of the knobs.

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