Befaco BF22 User manual

BF22
USER MANUAL

BF22 USER MANUAL
Thanks for choosign Befaco BF22 Eurorack lter!
Before you plug this module in...
1. Disconnect your cabinet from mains.
2. Triple check the power cord polarity. The colored line on the cable
(pin number one) is the -12V rail.
3. If you plug the module backwards you might burn it and,
unfortunately this is not covered by the warranty.
4. If you have any questions about this product please send them to:
[email protected]
Introduction
-12V
This is a dual Hi/Low pass lter. Inspired by the famous
sallen key lter from MS-20 early version.
It has attenuverters (inverter-attenuator) as an addition
to the normal CV control in Cut-O and CV control
for the resonance with a little more presence of the
resonance than the original. The normal CV control for
Cut-O keeps tracking trough 3 octaves.
The ‘Link’ switch connects the input of the second into
the output of the rst to have it in series
Specs:
• Eurorack Compatible
• Can be powered with +/-12V or +/-15V without
changes.
• Current needs: +12V: 40mA -12V: 35mA
• Banana or minijack connectors available
• Selectable HP/LP mode 6/12 dB
• Cuto and resonance CV controlled.
• 17 HP / 47 mm depth

system the character and characteristics of early




CUT-OFF
RESONANCE

BF22 USER MANUAL



• At mid position: CV = 0.
• Full clockwise: CV is at maximum level.
• Full counterclockwise: CV at maximum but inverted.

This CV is aected by the CUT-OFF CV IN ATTENUATOR/
INVERTER (3).

It tracks Volt/oct around 4 octaves.

Select between Hi-pass and Low-pass. For classic MS20
sound set the rst lter to HP, the second to LP and
switch up the Link (11).


Keep it at maximum before LEDs blink for maximum
resonance and minimum noise oor.
Dierent settings here can give you dierent tones.
Feel free to experiment.



It sends the OUT of lter A (10A) to the IN of lter B
(9B) and disconnect the IN of the lter B (9B).
In/Out reference
6A
7A 4A 5A
3A
8A
9A 10A
6B
7B 4B 5B
3B
8B
9B 10B
11
2A
1A
2B
1B