User manual ROLLS DU30B
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Manual abstract: user guide ROLLS DU30B
Detailed instructions for use are in the User's Guide.
[. . . ] Thank you for your purchase of the Rolls DU30b Mic Preamp Audio Ducker. [. . . ] (. 5 kg) 12 - 16 VDC 50mA 5 x 1. 2 mm DC Jack - Center Negative
DU30b DUCKER
REAR PANEL MIC IN: Female XLR jack for connection to a dynamic or condenser paging microphone. PHTM PWR: Jumper for engaging the +12 volt phantom power to the microphone input - configured OFF from the factory. 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. 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. 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 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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