The TBL1S input module is a transformer-isolated, line-level, balanced input module. The module has a pluggable 3-pin screw terminal input barrier strip connector to make the input connection. The module has a jumper-selectable input impedance of 600 ohms or 10k ohms. The module also has a gain/trim control that will allow the gain to be adjusted from -11 dB to +19 dB. It has the ability to mute lower priority modules and be muted by higher priority modules. The module is able to assume any of 4 priority levels. The module has a VOX/gating circuit to control muting of lower priority modules and its internal gating circuit with controls for threshold and duration. It also has a continuously variable ducking control that will enable attenuation of the input signal from a minimum of -10 dB to a maximum of - 72 dB relative to the normal unmuted condition and a gradual fade back from mute when the mute or gate control is deactivated. The module’s output is assignable to either or both of two mixing buses.