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[. . . ] Thank you for your purchase of the Rolls DU30b Mic Preamp Audio Ducker. This device temporarily and automatically mutes or "ducks" a background music signal under a paging microphone or other auxiliary signal. [. . . ] AUX IN: Stereo RCA jacks for connecting to a source different from the Mic In as the master signal. LINE IN: Stereo RCA jack for connection to the stereo signal source to be "ducked" such as a tuner, CD player or cassette player. OUTPUT: Stereo RCA jacks for connection to the system's amplifiers. Connect to the enclosed Rolls PS27 AC adapter. FRONT PANEL MIC/LINE: When pressed in, the gain of the XLR Mic In is reduced by 30 dB. RELEASE TIME: Adjusts the amount of time for the "ducked" signal to return to its normal level. Counterclockwise; slow - Clockwise; fast. MIC LEVEL: Adjusts the amount of gain in the Mic In circuit. DUCK SENSITIVITY: The Threshold at which "ducking" begins. When the microphone level reaches the threshold, the signal present at the Line In jacks is reduced until the announcement is over, then the Line In signal returns to its previous level
A NOTE ON THE DU30b THRESHOLD SETTING, WITH THE SENSITIVITY CONTROL FULLY CLOCKWISE: If the control (paging) signal is on the XLR input, then ducking begins (the threshold is) at -40 dB when the Mic/Line switch is set to "Mic", and 0 dB when the switch is set to "Line". [. . . ] Set the Release Time control for the amount of time you wish for the Aux In signal to return to normal. Set the Duck Depth control for the amount of Aux In signal reduction you want when the Mic or Alternate signal is present.
WARRANTY For information on the Rolls One Year Limited Warranty, and to register this product, visit our website at www. rolls. com
Rolls Corporation Salt Lake City, UT 9/05 [. . . ]
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