Unlike classic vactrol filters or lopass gates the Borg has a resonance circuit borrowed from the Korg MS-20 which sounds a little more dirty. A control blends the filter characteristic from lowpass over bandpass to highpass. The Borgs are more than just 12dB/octave filters: the resonance control is a push-pull potentiometer that turns the filter into a VCA.
The signal path of the Dual Borg is selectable: Series or Parallel.
The Series mode, when you plug into either in 1, or in 2, or even both inputs (as a mix), the signal is routed through the Borg I then the Borg II filter and both out 1 and out 2 have the same signal. Parallel mode is flexible depending on the in- and output signals. a) a single input into in 1 or in 2 is routed through both filters side by side, and a single output (either out 1 or out 2) will give you a mix of both filters. b) If you have only one input but two outputs, out 1 is the Borg I filter only and out 2 is Borg II only. c) If you have two inputs and two outputs, then each filter is completely separate: in 1 and out 1 is Borg I, in 2 and out 2 is Borg II.
Per Filter: In, Out, External CV input with attenuator, KEY-CV input (1V/octave)
3U Eurorack module, 16HP wide, 25mm deep
Current draw approximately 80mA