Manufacturer’s Description
DFP-225 Description The DFP225 is a Professional Digital Feedback Eliminator performing a Feedback detection based on theDynamic Band Scanning and High Precision Notch Filters Automatic placement for high end Degrees Musicalapplications, or a feedback Elimination based on a precise frequency shift of the overall band, for high end Degrees Vocalapplications..The DFP225 is a powerful digital feedback detection device that can be used in dual channel,stereo or monomode. The DFP225 has been carefully designed to protect audio events from feedback problems that can occur between loudspeakers and open microphones. Notch Filter Mode: the system can be set up for automatic detection, or be configured manually and according to user settings.The feedback system analyzes all frequencies in the signal path, determines the cause of the Larsen effect and cancels it by implementing up to 25 real-time high precision notch filters that have -45dB attenuation. The system is adjustable in steps, allowing the user to change the DFP225 sensitivity to audio feedback according to your situation requirements. The parameter settings of the 25 notch filters per channel remain in EEprom memory, but if it is required tokeep them as a setting for future reference they must be saved in a user memory preset. Frequency Shift Mode: in this mode, the input signal is frequency shifted in order to avoid the sequent Degrees gain arise on Air, after the loudspeakers, due to sum of equal bands.This method is AVOIDING the feebdack to occur, instead of Degrees removing itafter occurred.Due to the Degrees Frequency modificationintroduced by the method, alterating the original tone of the full signalband, it is suggested to be used for Vocal applications, but even very good also for musical ones, being the frequency shift actually pretty small, ranging from 1 up to 4.5 Hz, and distributed proportionally on the overall band, so not modifying the original
The Specs
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