Befaco BF-22 Sallen Key Filter
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Befaco
BF-22 Sallen Key Filter
Product Info
Article Number:
466964
Brand:
Befaco
Model:
BF-22 Sallen Key Filter
Category:
Filter Modules
Price:
$240.90
* Prices may vary. Check retailer for current pricing and availability.
The BF-22 nails that classic MS-20 filter vibe without the full modular commitment. It's a great way to add some grit and character to your Eurorack, especially if you’re after that raw, aggressive sound, and it's an excellent entry point into more complex filter designs.
Product Description
- Befaco BF-22 Sallen Key Filter
- Eurorack Module
- Analogue two-channel filter from the MS-20
- Each channel switchable between 12dB low pass and 6dB high pass
- Per channel controls for filter frequency
- resonance
- input volume
- 2 CV inputs for filter frequency (1 x with bipolar attenuator)
- Resonance CV input
- Link switch connects both filters in series
- Current consumption: 40 mA (+12 V) / 35 mA (-12 V)
- Width: 17 HP
- Depth: 47 mm
PROS
- • Authentic MS-20 filter character, surprisingly warm and musical
- • Versatile 12dB/6dB modes offer broad sonic shaping
- • Link switch creates complex, evolving filter textures
- • Solid build quality with robust pots and reliable switching
CONS
- • 17HP footprint can be limiting in smaller racks
- • Limited input gain range requires careful level matching
- • Resonance can get quite aggressive, demanding careful modulation
Product Video
Key Features
Filter Type
Sallen-Key
Modes
12dB Low Pass, 6dB High Pass
HP Width
17
Depth
47 mm
Power Draw
40 mA (+12 V) / 35 mA (-12 V)
CV Inputs
2 (Frequency), 1 (Resonance)
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Frequently Asked Questions
It's close, but the BF-22’s resonance tends to be a touch more controlled and less prone to runaway self-oscillation, which can be a plus for beginners.
It’s genuinely useful for subtle or drastic frequency adjustments; it prevents wild, unpredictable movements and allows for precise filter sweeps.
While you *can* use it in stereo, the real magic happens when linking the filters—the interaction and complexity you get is where it truly shines.
