Doepfer A-124

Module A-124
is a special 12dB multimode filter using the « strange » filter circuit of the « EDP Wasp » (an analog synthesizer with black/yellow case built end of the seventies, manufactured by the UK company « Electronic Dream Plant »).
This design « abuses » digital inverters as analog operational amplifiers leading to distortions and other « dirty » effects that generate the specific sound of this filter.
The filter is equipped with a band pass output and a combined low/notch/high pass output. For this output a control knob defines the relation between low and high pass signal. If both signals appear at the same level (i.e. middle position of the Mix knob) one obtains a notch filter. Otherwise the low or high pass signal predominates. The module does not feature self oscillation in contrast to most of the other filters of the A-100 system.
30 mA 12V 30 mA -12V 0 mA 5V 45 mm Depth