Erica Synths Black Polivoks VCF V2, VCF module, Emulation of the Russian synthesizer Polivoks by the Formanta Radio Factory, The original Russian K140UD12 ICs are used, Filter modes: BP (6 dB / Oct) / LP (12 dB / Oct), Controls for input level, resonance, CV1 level and CV2 level, Cutoff control, Power consumption: + 11 mA, -11 mA, Dimensions (W x D): 10 HP / 25 mm