When feedback’s a problem, the Behringer DSP1124P Feedback Destroyer Pro is your best friend! The DSP1124P locates feedback frequencies immediately and sets extremely narrow notch filters to destroy them, leaving the remainder of the signal virtually untouched. The DSP1124P uses 24-bit A/D (analog to digital) and D/A converters, and a 24-bit high speed DSP for processing functions. The unit can function in Single Shot, Manual and Auto Mode.
Once the DSP1124P locates feedback frequencies, it sets extremely narrow notch filters to eliminate the selected frequencies, leaving the remainder of the signal virtually untouched. The DSP1124P features servo-balanced inputs and outputs on gold plated XLR and 1/4″ TRS connectors, accurate eight-segment LED meters, and “future proof” software upgradeable architecture.
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To restoring Behringer DSP 1124P to it’s factory settings, just simply switch ON while simultaneously holding the [FILTER SELECT] and [STORE] buttons, until power-up keep the switches pressed for another second.
Warning! This operation returns all settings you’ve made in the menus to their factory-set condition. Be sure that you want to do this. This procedure also applies to the FBQ-1000, FBQ-2496 units. Hopefully the article of “Resetting Behringer Feedback Destroyer Pro DSP 1124P” can help you.
Reference: Behringer DSP 1124P manual