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IGS Audio 576 Blue Stripe 500-Series Mono FET Compressor Module

Original price $1,095.00
Current price $895.00

The 576 Blue Stripe is a revised version of the classic FET compressor, ready for your 500 series rack!

What it is:

The FET-type solution was first used for its application in the legendary UREI 1176 compressor from the 70s. The most important feature inspired by revision A is the input transformer used and pure class A output stage. The compressor is equipped with a relay bypass, 2:1 Ratio and Slam Mode accessible on the front panel.

What it does:

The 576 BS’s major selling point is its ultra-fast attack time — 20 µS. The 576 BS Ratio buttons allow four different modes of operation: 2:1 Ratio (soft compression); 4:1 ratio (moderate compression); 8:1 ratio (severe compression); 12:1 ratio (mild limiting); 20:1 ratio (hard limiting); S – SLAM, All Buttons In trick mode.


  • Stereo Link (linkable in PSU)
    Input Impedance (balanced) 2.4k
    Output Impedance (balanced) 600 Ohm
    Audio transformers Yes, Carnhill on input and output
    Operating Level +4 dBu
    Max input level +20 dBu
    Max output level +22 dBu
    Noise Level -99 dBA
    Max. gain 36 dB
    Max Gain Reduction -20 dB
    Ratio 2:1, 4:1, 8:1, 12:1, 20:1, Slam (All in)
    Attack: 20us - 800us
    Release: 50ms - 1.1s
  • BANDWIDTH: Frequency response 8 Hz to 20 kHz, +/- 0.1dB
  • DISTORTION (@ 20 HZ - 20 KHZ)
  • THD+N 0.014%
  • Power consumption 2.5W
  • PACKING BOX: Shipping weight 1kg