doepfer a-123 24db high pass (vcf4) price : $145.00

module a-123 (vcf 4) is a voltage-controlled high-pass filter, which filters out the lower parts of the sound spectrum, and lets higher 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). two cv inputs are available.

the cut-off slope is -24 db/octave. the circuitry uses a curtis cem 3320 chip.

voltage controlled resonance: on the vcf 4, resonance can be controlled not just manually, but by voltages as well, right up to self-oscillation. in this case, the filter behaves like a sine wave oscillator.

this module has a maximum current draw of 20ma. it requires 8 te/hp worth of space to fit in a eurorack frame.

to view this module's user manual as a pdf file, please click here.

please click here to visit the manufacturer's webpage for more info.