Eurorack Module (pre-owned): Toppobrillo Multi-FilterThe Toppobrillo Multifilter is a eurorack state variable filter the original version from Toppobrillo This module is pre owned and in excellent condition. The original manual can be found here: http: sdiy. org toppobrillo multifilter. html Some features from Toppobrillo's original site: 4 outputs: 12dB Oct Lowpass, Hipass; 6dB Oct Bandpass and Notch Notch "Balance" control dials in the H L ratio with constant power design voltage controlled resonance