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M²Synth HP VCF 111 Kit

(£70.80 UK, incl VAT)
200 g
Out of stock
Please allow 4 weeks for dispatch

Under construction

The voltage controlled filter is the prime method of filtering the harmonics of the input audio signals. The M²Synth has a number of filter choices:

  • VC LPF 110 A low pass filter (attenuates higher frequency harmonics) with a 3-channel input mixer. Width 2U.
  • VC LPF 116 A mini version of the low pass filter 110 without the 3-channel mixer. Width 1U.
  • VC HPF 111 A high pass filter (attenuates lower frequency while passing higher frequency harmonics). Width 1U.
  • VC BPF 113 A band pass filter that attenuates frequencies above and below the centre frequency passing only a narrow band of frequencies). Width 1U.
  • VC BRF 114 A band reject (notch) that attenuates a narrow band of frequencies while passing frequencies above and below the centre frequency - opposite of the band pass filter. Width 1U.
  • VC APF 115 A filter that passes all frequencies but varies the phase of the input signal at different frequencies in a non-linear way. Width 1U.
  • VC SVF 112 A state variable filter that is 4 filters in 1 LPF, HPF, BPF & APF that can be used in combination of series / parallel for complex filtering effects.


The voltage controlled 24dB/octave 4-pole high pass filter passes the higher harmonics whilst blocking the lower frequencies hi-hats anyone?


  • 1 Volt / Octave cut-off frequency CV)
  • Cut-off modulation input with potentiometer attenuator (FM)
  • Resonance potentiometer control with an external CV resonance input
  • Self-oscillates with high resonance settings.


  • Supply voltage +/-12Vdc
  • Supply current  +mA / mA
  • Waveform levels +/-5V
  • Frequency range: 36Hz to over 26kHz without any CV applied
  • Main PCB dimensions 43.5x130mm

Kit contents

Each kit contains

  • Main PCB
  • Jack socket PCB
  • All electronics components, IC sockets and power socket
  • 100mm long Power lead 
  • Potentiometers, knobs and jack sockets
  • Front panel assembly (faceplate and 3mm aluminium back panel)
  • Fixings