The efficient Bogen SAX1R STEREO AUXILIARY MODULE is a stereo, high-impedance, unbalanced input module. The module has two RCA jacks for its input connectors. The module has a gain/trim control that will allow the gain to be adjusted from -20 dB to +6 dB relative to 0 dB nominal gain. 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. 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 48 dB relative to the normal unmuted condition and a gradual fade back from mute when the mute or gate control is deactivated.