Behringer Feedback Destroyer Pro FBQ2496 User Manual

FEEDBACK DESTROYER PRO FBQ2496 User Manual

The FBQ2496 filters can be set up in an extremely narrow-band fashion. This way, 

the FBQ2496 changes the way your music sounds to such a minor extent that the 

actual change is absolutely negligible and inaudible.

Fig. 4.1: Filter curve of a narrow-band filter

1.  Press POWER to turn the unit on. The display shows run (run).
2.  Select whether you wish to run your FBQ2496 in stereo or in mono (

(13)

).

Let us assume that both FEEDBACK DESTROYER PRO channels are coupled 

in stereo.
The 20 filters pro channel can be divided up among Single-Shot filters, 

automatic filters and parametric filters (fig. 4.2).

Single Shot-

filters

automatic

filters

parametric

filters

Fig. 4.2: Different filter types (shown here in stereo operation)

If no Single-Shot filters have been set up, the FBQ2496 looks for critical 

frequencies after being powered up, and deploys as many filters as necessary to 

combat the problem.
Single-Shot filters can be set up to work with extreme dependability and 

comfort. To this end, either use the LEARN or the AUTOLEARN function of 

your FBQ2496.

LEARN mode
1.  Briefly press the LEARN button. 

The button LED lights up and the LED on the PANIC button blinks. 

The current number of Single-Shot filters is shown in the display. (S 0 = 

no Single-Shot filter selected, S20 = all filters deployed as Single-Shot 

filters). The FBQ2496 immediately starts searching for critical frequencies 

at maximum speed and deploys as many Single-Shot filters as necessary 

(for this to work, your room has to have a functioning PA system with a 

signal fed into it). The number of filters deployed will be increased on a 

per-need basis and will be shown in the display.

2.  You can use the wheel to change the number of Single-Shot filters 

afterwards as well.

3.  Press the LEARN button again to exit.

AUTOLEARN mode
This function is useful for automatically setting up Single-Shot filters before the 

start of a live performance (“priming” the unit).
1.  Keep the LEARN button pressed for longer than one second. 

Then, the following happens automatically:

The button LED blinks.

All Single-Shot filters and automatic filters are reset.

A time countdown runs in the display, from 16 seconds to zero (L16, 
L15

, ... , L 1, L 0).

The FBQ2496 creates impulses with a signal level of -15 dB in order to provoke 

feedback. The overall amplification of your FBQ2496 is incrementally increased 

from 0 dB to 15 dB). The FEEDBACK DESTROYER PRO detects the critical 

frequencies and lowers them in an extremely narrow-band fashion.
2.  Critical frequencies are consecutively lowered and stored in the storage slots 

of the Single-Shot filters.

3.  After the time had run out, the procedure is over. The LED on the LEARN 

button is no longer lit and the display shows run.