behringer XR-4400 GATE

4 high-quality expander/gate channels
IRC (Interactive Ratio Control) expander/gate circuitry for virtually inaudible noise suppression
Extremely short attack time (<10 µsec) to capture ultra-high speed signals such as drums
Parametric side chain filter with monitor function
Independent Hold and Release controls for flexible envelope shaping
Maximum attenuation 80 dB
FlexLink system for ultimate master/slave configurations
Dedicated “Traffic light” Threshold and Gain Reduction LED indicators
Servo-balanced inputs and outputs with ¼” TRS and gold-plated XLR connectors