Doepfer A-101-2 Vactrol Lowpass Gate
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Doepfer
A-101-2 Vactrol Lowpass Gate
Product Info
Article Number:
114708
Brand:
Doepfer
Model:
A-101-2 Vactrol Lowpass Gate
Category:
Filter Modules
Price:
$108.90
* Prices may vary. Check retailer for current pricing and availability.
This A-101-2 is a fantastic little module for anyone wanting that classic Buchla vibe without a massive investment. The Vactrol gives it a really smooth, almost liquid quality, perfect for creating evolving soundscapes and subtle rhythmic gating – it’s a real character piece.
Product Description
- Doepfer A-101-2 Vactrol Lowpass Gate
- Vactrol lowpass gate
- Combination of low-pass filter (LP) and VCA
- Based on the idea of the Buchla module 292
- The frequency (in LP mode) or the amplitude (in VCA mode) can be controlled manually (F / A) and via 2 external control voltage inputs: CV1 (without an attenuator) and CV2 (with attenuator)
- Function of the module can be set via toggle switch (LP / VCA )
- Width: 8TE / 8HP / 40.3 mm
- Depth: 50 mm (measured from the rear of the front panel)
- Power requirements: +20 mA (+12 V) / 20 mA (-12 V)
PROS
- • Warm, organic filtering thanks to the Vactrol envelope follower
- • Excellent Buchla-inspired resonance character for evolving textures
- • Compact 8HP form factor maximizes modular space efficiency
- • Dual CV inputs offer versatile modulation possibilities for dynamic soundscapes
CONS
- • Vactrols can exhibit some drift, requiring occasional calibration
- • Limited filtering options compared to dedicated multi-mode filters
- • Power draw slightly higher than some other Eurorack modules
Product Video
Key Features
Filter Type
Lowpass
Modes
LP/VCA
HP Width
8HP
Depth
50 mm
Power Draw
+20 mA (+12V) / -20 mA (-12V)
CV Inputs
2 (CV1 - unattenuated, CV2 - attenuated)
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Frequently Asked Questions
Vactrols are known for slight drift, so you might notice subtle changes in filter cutoff or amplitude over time. It's usually minimal and can be addressed with occasional calibration, which is easy to do.
Yes, the VCA mode provides a simple but effective amplitude control, though it lacks the advanced features of dedicated VCA modules.
The attenuation on CV2 provides a useful range, but very high voltage sources may still require further attenuation externally to prevent unwanted signal clipping.
