Module A-121s is a special dual multimode filter which can be used for parallel or serial organised dual mono filters. Even stereo applications are possible. The filters are based on two special circuits: one with highpass and bandpass outputs, the other with lowpass and bandpass outputs. It's a new filter design that is not used so far in any other A-100 filter module.
Doepfer attached great importance to the usability of the manual controls and CV inputs for dual filter applications: for the filter frequencies of both filters a common control (Frequ.) and a difference control (Delta, filter spread) are available. For both parameters even CV inputs are available (FCV, DCV). The resonance (Q1, Q2), the sensitivity of the individual frequency control input (FCV1, FCV2) and the level of the audio input (In1, In2) are adjusted by means of the individual controls for each filter.
Product Specs
- Item Number: 32983
- Make: Doepfer
- Model: A-121d Multimode Dual Filter
- Condition: Brand New
- Finish: Silver
- Categories: keyboards-and-synths ā eurorack
- Function: Dual/Stereo Filter
- Made In: Germany
- MPN: A-121d
- Modular Grid: Eurorack ā ļ¼
- Dimensions*: 8 HP 45 mm deep
- Power*: 30 mA +12V 30 mA -12V ? mA 5V
* User contributed details