Doepfer A-120 24dB Low Pass 1

The Doepfer A-120 24dB Low Pass 1 filter module is based on the classic ladder-filter design invented by Bob Moog. You might have guessed that it is a cost-effective reproduction of one of the most well-known characteristics of electronic music. Thanks to the plenty of FM inputs, you can achieve really complex FM (frequency modulation) with it too.

€109.00 €90.83

Availability: Limited stock

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SKU
A-120

The Doepfer A-120 24dB Low Pass 1 filter module is based on the classic ladder-filter design invented by Bob Moog. You might have guessed that it is a cost-effective reproduction of one of the most well-known characteristics of electronic music. Thanks to the plenty of FM inputs, you can achieve really complex FM (frequency modulation) with it too.

The Doepfer A-120 24dB Low Pass 1 is a voltage controlled low-pass filter, which filters out the higher parts of the sound spectrum, and lets lower frequencies pass through. The Cut-Off Frequency determines the point at which filtering takes effect. You can control this manually, or by voltage control (filter modulation, for instance by an LFO). Three CV inputs are available, and the sum of the voltages from these affects the filter cut-off.

The module is based on a so-called "transistor ladder" design, with a cut-off slope of -24 dB/octave, as in various Moog synthesizers. That's what gives it its classic, legendary Moog sound. Resonance (or Emphasis) is adjustable all the way up to self-oscillation - in which case the filter behaves like a sine wave oscillator. For more detailed information please look at the English user's guide

Technical note: The module has been revised in 2009. The single transistors have been replaced by so-called transistor arrays which look like integrated circuits. But these are no "real" integrated circuits but contain nothing but 5 matched transistors.

The new version of the module is still a transistor ladder based low pass filter !

More Information
Category Filter Filter
Width (HP) 8
Depth (mm) 65
Skiff friendly No
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