Elby Designs
CGS735 Synthacon Filter - 15HP

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Item: N12-1461

Availability: In stock



CGS735 Synthacon Filter - 15HP


The CGS735 Synthacon Filter is a "tribute" module, based on the awesome Steiner-Parker Synth VCF.

Unlike most multimode filters, which have a single input and seperate mode (LP/HP/BP) outputs, this filter has an input for each mode and a single output. This gives the filter a ton of character and allows for a lot of interesting effects. Resonance is a bit unusual in its behavior. Once it starts oscillating, the resonance pot needs to be backed off a fair way to get it to stop again. It can also be frequency dependent.

This module includes an input mixer. Each of the filter type inputs has its own level control. The ALL input is also affected by these level pots as it is mixed with the individual inputs prior to the level controls. If using only a single input, it may be better to feed the signal into the ALL input, and adjust the level pots to select LP, BP or HP, rather than changing the patch cord between the specific input jacks.

If the same signal is used in all inputs, the result is reminiscent of a phaser. The real fun starts when you feed different signals into each input, then you get a frequency based "interpolating scanner", where sweeping between different sound sources is possible, though also subject to the frequency at which they are running.


  • All input - Feeds input to all modes
  • Highpass, Bandpass, and Lowpass modes
  • Input and level knob per mode
  • Resonance level knob
  • Cutoff Frequency knob
  • Cutoff Frequency CV in with level knob
  • Single Output

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  • Eurorack Module
  • 15 HP Wide
  • +12V: 15 mA current draw
  • -12V: 15 mA current draw
  • 8.5 cm deep

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