Bogen SAX1 Stereo Aux Input Module (for Bogen Matrix Systems)Bogen's advanced plug in modules provide a wide range of functions to support a variety of applications. These modules support different signal source requirements, including the ability to interface to balanced and unbalanced high and low level inputs, stereo or mono, telco systems, and microphones. Features: Gain Trim control Bass & Treble controls Gating w Threshold & Duration Mute send & receive Variable ducking level when muted gated Fade back