Doepfer A-105-2
Professional music gear - detailed information and where to buy
Doepfer
A-105-2
Product Info
* Prices may vary. Check retailer for current pricing and availability.
The A-105-2 is a workhorse filter – it’s a fantastic recreation of that classic Moog vibe, and it’s reliable as heck. If you're building a modular system focused on warmth, grit, and that vintage analog sound, this filter is a crucial building block and a budget-friendly starting point.
Product Description
- Doepfer A-105-2
- Eurorack Module
- Analogue low-pass filter (24 dB/oct.) based on the SSI2144 filter module
- Control for filter frequency (range: 15 - 15
- 000 Hz) and resonance
- Two CV inputs for filter frequency (1 x 1 V/octave and 1 x with attenuator) and one CV input with attenuator for resonance
- Two audio inputs (1 x with attenuator) and audio output
- Power requirement: 20mA (+12V) / 20mA (-12V)
- Width: 4 U
- Depth: 45 mm
PROS
- • SSI2144 chip delivers a classic, resonant Moog-like character.
- • Solid build quality with Doepfer's renowned robust Eurorack construction.
- • Versatile CV routing allows for complex modulation possibilities.
- • Excellent value for a filter module of this sonic quality and pedigree.
CONS
- • Limited filter modes compared to more modern, complex filter designs.
- • 4 U width can be restrictive in smaller Eurorack cases.
- • The attenuators can feel a little coarse for very subtle adjustments.
Product Video
Key Features
Filter Type
24dB/octave Low-Pass
Modes
Single Mode
HP Width
N/A
Depth
45 mm
Power Draw
40mA
CV Inputs
1V/oct (attenuated), Attenuated Resonance, Filter Frequency Attenuated
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Frequently Asked Questions
It's a very close approximation, capturing much of the Moog's warmth and resonance, though the SSI chip has its own subtle nuances – slightly less aggressive overall.
Yes, it will self-oscillate at high resonance settings, though it’s not as extreme or easily achieved as some other filters.
It’s a fairly linear attenuator, but with a slight taper; it's not a true logarithmic attenuator, so very subtle modulation changes might require careful calibration.
