The ADDAC System Dual Voltage Controlled Filter is a powerful VCF for Eurorack modular synthesizers. This filter features two separate filters, each with its own set of controls and CV inputs, allowing for a wide range of filtering options. One filter is Hipass and one is Lowpass, each has its own resonance control for adding a touch of character to the output. Additionally, the module features a mix output, allowing for both filters to be blended together to create complex filtering effects.


The ADDAC System Dual Voltage Controlled Filter features a post Distortion/Fuzz circuit that adds extra harmonic character to give your sounds  a heavy deeper growl or or a gritty bite. Each filter has its own inputs and outputs, making it easy to create stereo filtering effects. The filters can be set to track together or independently, giving you precise control over stereo imaging. Whether you're looking to add subtle filtering to a mix or create complex, evolving soundscapes, the ADDAC System Dual Voltage Controlled Filter is a powerful tool that will inspire new sonic possibilities.



The ADDAC System Dual Voltage Controlled Filter is inspired by the original MS-20 filter.


This module features:

  Two independent filters, a High-Pass and a Low-Pass with dedicated audio inputs and outputs. 

  Besides individual outputs the HP and LP are also sent to a voltage-controlled Mix between the HP and LP filters.

  Both Cutoff and Resonance are voltage-controlled with dedicated cv attenuator pots.

  Switch for selecting between normal cutoff behaviour and an adjustable Smooth circuit to simulate a vactrol behaviour for cutoff control.

  Switch for setting filters Filters in Parallel (independent) or Series (HP > LP).

  Inspired by the Oscar synthesizer we added a Coupling switch to tie the HP Cutoff control to the LP Cutoff control, in this case the LP cutoff controls act as an offset from HP setting.

  Three position switch selects different resonance clipping paths: diodes / no clipping / leds.

  Both filters features a post Distortion/Fuzz circuit that adds extra harmonics adds an even deeper growl or extra gritiness to it.

  All audio outputs (HP, Mix, LP) feature a switch for choosing phase output, allowing additive or subtractive mixes.

  Three Leds monitor the amplitude of the three outputs (HP, Mix, LP).

Module Parameters
Current Draw80 mA +12V 80 mA -12V ? mA 5V
Panel Size16HP

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  • $391.00
  • Ex Tax: $391.00

Tags: addac, 702, dual, voltage, controlled, filter, module, system, asmad702euro16 factory, assembled addac702, (factory, assembled) modules diy, synthesizer, kits