Behringer FBQ6200 Manuale Utente

ULTRAGRAPH PRO FBQ6200/FBQ3102/FBQ1502 User Manual

3.2.1  
Priming describes the process of detecting and supressing feedback frequencies. 

After placing and leveling your mics and monitors (incl. power amps), you should 

crank up the aux send controls of your mixer.
Now, activate the FBQ feedback detection system by pressing the FBQ switch 

(3)

. 

The slide control LEDs 

(9)

 will turn dark. Then, increase the amplification on your 

mixer by using the aux send master control until you notice feedback starting to 

occur. Feedback frequencies will now be easily visible through intensive lighting 

of the relevant LEDs. 
Pull down the slide controls whose LEDs are lit until the feedback subsides. 

Repeat this procedure to weed out other possible feedback frequencies. 

After having adjusted all critical frequencies, when you crank up the aux send 

master control, you will be able to hear only the initial multi-frequency feedback. 

Your monitors have reached their maximum volume.
Leave all other faders in the middle position as long as no need for frequency 

correction occurs (e.g. measuring with a real-time analyzer). Set the desired 

stage volume, and you will have a tremendous amount of headroom available 

to you, without creating audible feedback.

Additional applications await the ULTRAGRAPH PRO models in the studio. 

No limits stand in the way of your imagination. Here are just a few examples 

of possible uses:

EQing your studio monitors:
You can conduct a graphic equalization of your monitors. Besides, you can supress 

narrow-band room resonance. An analyzer, for example the analyzer integrated 

into our digital equalizer ULTRACURVE PRO DEQ2496, can help you when you are 

looking for room resonance and a linear frequency response.

General sound processing:
Equalizers can be used to process both single-channel and master signals. 

To process single-channel signals, you should connect the ULTRAGRAPH PRO 

via the channel inserts on your mixer. To control several signals with your 

ULTRAGRAPH PRO, use either subgroup or main mix inserts. Nowadays, 

the overall sound of a mix is often “tweaked” with equalizers. Often, a mix is not 

uniform, that is, frequency ranges are either too prominent or not prominent at 

all. A graphic equalizer lets you find a fitting ratio between the intensity of these 

various frequency ranges in order to achieve a homegenous sound.

In recording studios as well as stage or radio plays, the ULTRAGRAPH PRO will be 

your valuable sound tool for modifying the sound of voices (e.g. telephone voice) 

or to filter instruments so that they fit in an existing mix.
The tables on the separate

 

add-on sheet give you an idea of specific frequencies 

and their acoustic significance, and suggest some possible uses for your 

ULTRAGRAPH PRO.

The FBQ1502 requires one height unit (1 HU) for mounting in a 19" rack, 

the FBQ3102 two height units, and the FBQ6200 three height units. Please allow 

at least an additional 4" of space for the connectors on the back panel.
Be sure that there is enough space around the unit for cooling and please do 

not place your ULTRAGRAPH PRO on high-temperature devices such as power 

amplifiers etc. to avoid overheating.
For rack mounting, please use M6 metal nuts and bolts.

You will need many different cables for the various applications. The following 

illustrations show how these cables should be laid out. Please use exclusively 

high-grade cabels.
The ULTRAGRAPH PRO is installed with electronically servo-balanced inputs and 

outputs to avoid hum noise problems.
You can, of course, also connect unbalanced devices to the balanced inputs/

outputs. Either use mono plugs, or connect the ring and sleeve of stereo plugs 

(bridge pin 1 and pin 3 when using XLR connectors).

For unbalanced use, pin 1 and pin 3 have to be bridged

1 = ground/shield
2 = hot (+ve)
3 = cold (-ve)

1

2

3

1

2

3

Fig. 4.1: XLR connectors