Справочник Пользователя для Behringer Musical Instrument Amplifier FBQ3102

ULTRAGRAPH PRO FBQ1502/ULTRAGRAPH PRO FBQ3102/ULTRAGRAPH PRO FBQ6200

3.2 Equalizer in the monitor path

When using your ULTRAGRAPH PRO in the monitor path, the

same applies as when using it as described in section 3.1.

Basically, the stage volume should be as low as possible

because:
1.

this protects your hearing,

there are fewer feedback problems, and

it is easier to create a good FOH sound.

Often, monitor volume level is increased during a concert. Use

intermissions in the program to lower all monitor paths roughly

3 dB. The musicians will hardly notice this reduction because

their hearing can recover somewhat during an intermission. This

way you can achieve valuable headroom for possible use later

in the program.

Extremely deep frequencies are usually completely removed

to avoid creating a queasy feedback stage sound. To this end,

use the low-cut filter and set it up in such a way that extremely

deep feedback completely disappears, creating a more

transparent monitor sound.

Fig. 3.2: The ULTRAGRAPH PRO FBQ3102

in a monitor system

3.2.1 Priming a monitor system

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

. The slide control LEDs

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.

3.3 Using the ULTRAGRAPH PRO in the studio

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.

3.4 Special sound effects

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.

3. APPLICATION EXAMPLES