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Befaco BF-22 – DIY Kit

Befaco BF-22 – DIY Kit

Regular price €125,00
Sale price Regular price

Product details

Main features

  • Dual filtertwo Sallen-Key channels based on the early MS-20, each switchable HP or LP
  • CV controltwo CV inputs per channel, the first with an attenuverter, plus CV over resonance
  • Link switchroutes channel one's output into channel two for series filtering
  • Trackingcutoff CV tracks over 3 octaves

Overview

The Befaco BF-22 DIY Kit contains the parts to build Befaco's BF-22 VCF, a dual high-pass/low-pass Eurorack filter based on the Sallen-Key circuit of the early Korg MS-20. It is aimed at modular users who want that dirty, screaming early MS-20 character in their rack and who are comfortable with a medium-difficulty solder build.

  • Two filter channels modelled on the early MS-20 Sallen-Key design, each switchable between high-pass and low-pass
  • Two CV inputs per channel, with an attenuverter on the first
  • Voltage-controlled resonance, with attenuverters on both cutoff and resonance; Befaco gives the resonance a little more presence than the original
  • Link switch that routes the output of channel one into the input of channel two
  • Cutoff CV tracking over 3 octaves

A classic way to use it is to set the first channel to high-pass and the second to low-pass, then engage Link to run them in series for the familiar MS-20 band-shaping and squeal. Run separately, the two channels can process two different signals.

Befaco is clear that the BF-22 also carries over the MS-20's noise floor, so it suits gritty, characterful patches rather than situations where a very quiet filter is needed. The kit includes everything needed for a finished module, including a power cable and four Befaco Knurlies M3 rack screws. Befaco publishes an assembly manual, user manual, schematic, BOM and an interactive build guide to support the build.

Specifications· 14 details

Format

Format
Eurorack
Width
17 HP
Front panel
Heat-treated aluminium
Filter type
Dual Sallen-Key, high-pass / low-pass

Inputs & outputs

CV inputs
2 per channel

Controls

Attenuverters
Cutoff and resonance
Link switch
Channel 1 output to channel 2 input
Cutoff CV tracking
3 octaves

Power

Power draw +12V
40 mA

General

DIY
Yes
Functions
Filter
Height
3U
Synthesizer form factor
Control voltage or gate connectivity

About the brand

Befaco

Barcelona-based maker of open-source Eurorack modules, sold assembled or as DIY kits. Known for experimental voices such as Oneiroi, hands-on build workshops and designs released under a Creative Commons licence.
Origin
ES
Founded
2010
Products
127
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