CFM SPT Filter

Eurorack Module SPT Filter from CFM

Switching Pole Topology 3320-based multimode VCF

http://www.cfmodular.com/SPT_FILTER

  • 35 mA +12V
  • 30 mA -12V
  • 27 mm Depth
12 HP Filter
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I wonder...might the problem be a component mismatch? Not the 3320 itself, but in the audio path "upstream". It might be worthwhile to A-B the schematics of this module against an "old skool" CEM3320 module to see if there's some component corrections that might even out the behavior/sound quality.