• Multimode Filter

GMS-214 Multimode Filter

15 Different Filter Modes and VC Resonance

This multimode filter has two signal inputs mixed at unity gain and allows selection of one of fourteen possible filter configurations from front panel switches. If the resonance control is set high enough, the filter will start to oscillate.

 Three CV inputs are provided. A 1V/Octave input controls the filter cutoff frequency in conjunction with the panel frequency control. A second frequency CV input has a level control, the resulting voltage being added to or subtracted from the base cutoff frequency resulting from the panel frequency control and 1V/Oct inputs. A resonance CV input followed by an attenuverter is combined with the panel resonance control to determine the amount of resonance that will occur. If the resonance control ia turned past about 80, the filter will start to oscillate with a clean sine waveform.

The MU version is housed in a 1MU (2.125 inch wide by 8.75 inch high) panel with DOTCOM compatible power connector.


1P Lowpass  
1P Highpass  
2P Lowpass  
2P Bandpass  
2P Band Notch  
2P Band Notch +1PLP
2P Highpass  
2P Highpass +1PLP
3P Lowpass  
3P Highpass  
3P Highpass +1PLP
3P Allpass  
3P Allpass +1PLP
4P Lowpass  
4P Bandpass  

Technical Specifications

Filter topology
Multimode 1 to 4 poles
Lowpass, Bandpass, Highpass, All Pass, Band Notch

Frequency Range
22Hz - 20KHz

Typical Input Impedance - each input
100K Ohms

Typical Output Impedance
1K Ohms (short circuit protection)

Frequency control inputs
2 - Input 1 fixed 1V/Octave,
Input 2 with level control

Resonance control input
1 - Input with attenuverter

Module Power
+15 Volts 35 mA.
-15 Volts 25 mA.
+5 Volts 100 mA.

Module Size
Panel height - 8.75 inches (222 mm)
Panel width - 2.125 inches (54 mm)
Depth (behind panel) 2.1 inches (53 mm)

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Multimode Filter

  • Brands Grove Audio
  • Product Code: GMS-214
  • Availability: In Stock
  • $275.00