This machine will turn your favourite dual mono compressor into a parallel, Mid/Side compressor.


The IGS Bison 500 is a simple mid/side processor with a dry/wet mixer. It can be plugged into any 500 series rack equipped with a standard power supply. It has two stereo jack connectors (2 sends and 2 returns) on the front panel of the device used for plugging in your favorite dual mono or two mono compressors.

One switch, one knob. All the stereo and punch you need.


With a flick of the switch your compressor(s) start working in Mid/Side mode, where the left channel controls the common/Mid section of the two channels and the right channel controls the difference between the channels referred to as Side. Adding more sides or compressing them differently can increase your stereo image significantly.

Just insert your favorite compressors here.


The dry/wet knob can be very useful for parallel mixing. It is great for situations, where you want to pump up the sound without losing the natural dynamics of the dry mix.

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  1. Input & Output
    Input Impedance (balanced) 10k Ohm
    Output Impedance (balanced) 50 Ohm
    Operating Level +4 dBu
    Max input level +18 dBu
    Max output level +29 dBu
    Dynamic Range 98 dBA (@ 1 kHz, +18 dBu)
    Frequency response 10 Hz to 30 kHz (+0.1 dB / -0.2 dB)
    Distortion (@ 20 Hz - 20 kHz)
    Signal to Noise Ratio 81 dBA (@ 20 Hz - 20 kHz)
    THD+N 0.003% @ (@ 20 Hz - 20 kHz)
    IMD (SMPTE) 0.005 % (@ 20 Hz - 20 kHz)
    Crosstalk 78 dB (@ 20 Hz - 20 kHz)
    Front Panel
    VU Meters Yes, 5 LED Bar Display
    Power consumption 8W
    Packing box
    Shipping weight 3 kg
  2. Files
    IGS BISON 500 manual v1.pdf