The GTX44 raises the bar in professional four channel noisegate/expanders. Packed with pro features including variable threshold, attack, release, hold, range, ratio the GTX44 can be used as a noisegate or downward expander. A special "Duck" mode allows for ducking via Gate Sidechain input. Also includes High and Lo-Pass filters with Sidechain monitoring for flawless isolation of instruments. Adjacent channels are stereo linkable. XLR balanced I/O and single TRS unbalanced I/O. Gate Key/Sidechain jack on every channel. 1U Rack.