The Pro VCF is a
faithful adaptation of a well-known 4-pole synthesizer filter in Eurorack.
The core of this design lies an Alfa AS3320 filter chip
based on the original Curtis. Countless synthesizers
used the 3320: Sequential Pro One, Prophet 5 rev 3, Drumtraks, Crumar Trilogy,
Stratus, Elka Synthex, some Fairlight CMI, Linndrum, Oberheim OB-8, OB-Xa, PPG
Wave 2
All full resonance the Pro VCF can self-oscillate.
FEATURES
- Two selectable filter slopes:
original 24 db/oct, and 12 db/oct.
- Two voltage controlled input
jacks for frequency CUTOFF w/ signal attenuators.
- A voltage controlled input jack
for RESONANCE w/ a signal attenuator.
- Two signal input jacks w/ individual
attenuators. At full clockwise, these
inputs can overdrive the filter from most eurorack oscillators and audio
sources.
- Includes a 10-pin to 16-pin
Eurorack ribbon connector.
Specifications:
- Inputs - 2 Audio Inputs, 3 CV
Inputs
- Outputs - 1 Mono Output
- Current – 10mA +12V, 11 -12V, 0mA
+5V (not used)
- Depth - 22mm
-
Width - 8HP, 40.5mm