Key data

Liquid filter

Parameter Value
Width 8HP
Depth 25mm
+12V current 35mA
-12V current 35mA
Lifetime 05/20 to 11/22
Modulargrid Link

Original printed manual

PDF download

Features

A multimode filter

  • High-pass, band-pass, and low-pass outputs.
  • Switchable slope control for the band-pass and low-pass outputs. The slope of the high-pass output varies with resonance.
  • The low-pass output goes through an internal VCA - the perfect "end of subtractive chain" output!

All the CV inputs you need

  • Un-attenuated frequency CV, calibrated for 1V/Oct tracking of the self-oscillation tone over 4 octaves.
  • Frequency CV with attenuverter.
  • Resonance CV. Self oscillation starts at 4V. Control voltages above 5V are non-linearly compressed, for fine control of resonance overdrive.
  • VCA level for the low-pass output.

Specifications

  • Cutoff knob range: 20Hz to 20kHz.
  • Fully analog, based on the V2164 low noise/distortion quad VCA chip, and LM13700 OTA for that extra bit of non-linearity.
  • Frequency CV inputs impedance: 100k.
  • Audio input impedance: 100k.
  • Resonance input impedance: 22k.
  • VCA level input impedance: 39k.
  • All CV inputs handle audio-rate modulations.