Behringer DSP1100P user manual Control elements, Feedback Destroyer PRO front panel

On start-up; all active filters (AU/SI) are indicated by flashing LEDs. When feedback has been detected and dealt with, the LED stops flashing. When all filters are set the oldest automatic filter starts flashing, indicating that it will be the next filter to handle new feedback. Parametric filters are also indicated by a non-flashing LED.

In Single Shot mode the filter will not release a setting which has been achieved until you manually change it. This is particularly useful with problems at discrete frequencies like turntable resonances and fixed micro- phone and monitor positions. If feedback is detected the filter will deal with that frequency and the status of that filter will change to Locked (LO). It will only widen its bandwidth or increase the attenuation but it will not release that setting to destroy a new feedback. In Auto mode the oldest filter will be released to destroy a new feedback.

1.4 Control elements

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Fig. 1.1: FEEDBACK DESTROYER PRO front panel

The BEHRINGER FEEDBACK DESTROYER PRO is equipped with ten parameters keys, one jog wheel (rotary control) which is used to alter the selected parameter or preset and a numeric LED display. Each of the 24 filters has one LED assigned to it, which informs you about the status of the filter. By means of an 8-stage LED meter each of the two fully independent channels can be monitored.

1.4.1 Front panel control elements

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Fig. 1.2: Display section DSP1100P

The two LED chains read the output signal level in dB, referenced to the internal digital maximum. If the FEEDBACK DESTROYER PRO is set to Total Bypass mode, the level meter displays the input level.

+Please note that the nominal level of the FEEDBACK DESTROYER PRO can be selected with the +4 dBu / -10 dBV switch located on the back panel.

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The FEEDBACK DESTROYER PRO features 24 filters which can be monitored conveniently with the indicators next to the display. Twelve LEDs inform you about the status of the filters of each channel (left/right). A bright LED announces that a filter has been set. Cyclically flashing LEDs idicate filters that are searching in Single-Shot and Auto mode.

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After power-up, the LED display reads the number of the preset last used. This clearly legible, 2½ digit numeric display has plus/minus indicators to show that parameters are being incremented or decremented in Edit mode.

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The indicators Hz, kHz, 1/60 and dB to the right of the display light up when you change the associated parameters in Edit mode. For example, if you raise the level of a filter, the “dB” indicator lights up. A “+” to the left of the preset number signals that the level is being increased.

1. INTRODUCTION 9