IGS Audio S-Type 500 VU, Stereo mix bus VCA compressor, 500 module, Parallel compression, Side-chain filter: OFF, 60, 90, 120, 180, 240 Hz, 4 dB operating level, Max. +21 dBu output, Max. 20 dB gain, Max. 20 dB gain reduction, Noise level dBA: -102 dB, Controls for threshold, out, mix, attack, Side-chain HPF, VU meter, Design: 500 module