Korg MS-20 early version inspired Filter. Black panel

This is a dual Hi/Low pass filter. Inspired by the famous sallen key filter from MS-20 early version.
It has attenuverters (inverter-attenuator) as an addition to the normal CV control in Cut-Off and CV control for the resonance with a little more presence of the resonance than the original. The normal CV control for Cut-Off keeps tracking V/oct around trough 3 octaves.

The ‘Link’ switch connects the input of the second into the output of the first to have it in series


  • 40 mA +12V
  • 35 mA -12V
  • ? mA 5V
  • 47 mm deep
  • Ø 4.41 (17 Votes) Average Rating

Available as an assembled Module and as a DIY project.

No info about availability.

$258 submitted Oct 25th 2015, 19:05 by Befacosynth | last Change Dec 5th 2015, 18:57 by Befacosynth
Specs are approved by the manufacturer

Date Region Description Price Seller
EUThe overall condition of this *Befaco Sallen Key Filter BF-22* is * | *good* ...€140,00tequan View
EUMint Factory build Never used. Boxed. Original owner. 6 months old. Sti...€150,00rsillsley View

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These merchants probably sell this module. Huh?


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