A-121-2 12dB Multimode Filter

Doepfer's 12 dB multimode filter, the successor of the A-121: the same filter as the Dark Energy II/III, with lowpass, highpass, bandpass and notch outputs at once.

Key features

• Voltage controlled multimode filter, -12 dB/octave, about 10 Hz to 20 kHz
• Four simultaneous outputs: lowpass (LP), highpass (HP), bandpass (BP) and notch (N)
• Frq sets the cut-off; FCV1 at about 1 V/octave, FCV2 through its attenuator FCV
• Q goes up to self-oscillation, where the filter plays as a sine oscillator; FCQ controls it through CVQ
• Lev sets the input level, with distortion past about 5 at A-100 audio levels
• Standard (aluminium) or Vintage Edition (black) panel