MachineRoom 204D Dual VCF is a dual voltage-controlled low-pass filter, which filters out the higher parts of the sound spectrum and lets lower frequences pass through.

Based on “transistor ladder” design of Minimoog 204D with a cut-off slope of -24 db/octave as in various Moog synthesisers. Resonance (or Emphasis) is adjustable all the way up to self-oscillation with V/Oct tracking up to 4 octaves.

Filter has separate controls for both sections, but can be used for stereo operations as well.


4 cv inputs (2 with attenuators) allows complex cut off modulation


25 mm deep


Power consumption: 120 mA +12V, 15mA -12V, 0 mA 5V

Hand-built in Kyiv, Ukraine



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