Manual Behringer Xenyx X1222USB (page 4 of 16) (English)

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4 XENYX X1222USB User Manual

1. Introduction

FBQ Feedback Detection System

The FBQ Feedback Detection System, integrated into the graphic equalizer, is one

of the most outstanding characteristics of this mixing console. This ingenious

circuitry lets you immediately recognize and eliminate feedback frequencies.

TheFBQ Feedback Detection System uses the LEDs in the frequency band faders

of the graphic EQ to indicate the critical frequencies. This way, what once used to

be a labor-intensive search for feedback frequencies is now an activity that even

a child could master.

The microphone channels feature high-end XENYX Mic Preamps that compare

well with costly outboard preamps in terms of sound quality and dynamics and

boast the following features:

• 130 dB dynamic range for an incredible amount of headroom

• A bandwidth ranging from below 10 Hz to over 200 kHz for crystal-clear

reproduction of even the nest nuances

• The extremely low-noise and distortion-free circuitry guarantees absolutely

natural and transparent signal reproduction

• They are perfectly matched to every conceivable microphone with up to

60dB gain and +48 volt phantom power supply

• They enable you to use the greatly extended dynamic range of your

24-bit/192 kHz HD recorder to the full, thereby maintaining optimal

audioquality

“British EQ”

The equalizers used for the XENYX Series are based on the legendary circuitry of

top-notch consoles made in Britain, which are renowned throughout the world

for their incredibly warm and musical sound character. Even with extreme gain

settings these equalizers ensure outstanding audio properties.

Multi-eects processor

Additionally, your XENYX mixing console has an eects processor with 24-bit

A/Dand D/A converters included, which gives you 16 presets producing rst-class

reverb, delay and modulation eects plus numerous multi-eects in excellent

audio quality.

The XENYX mixing consoles are equipped with a state-of-the-art switched-

mode power supply (SMPS). Unlike conventional circuitry an SMPS provides

an optimum supply current regardless of the input voltage. And thanks to its

considerably higher eciency a switched-mode power supply uses less energy

than conventional power supplies.

 CAUTION!

We would like to draw your attention to the fact that extreme volumes may

damage your hearing and/or your headphones or loudspeakers. Turn the

MAINMIX faders and the PHONES control in the main section fully down before

you switch on the unit. Always be careful to set the appropriate volume.

1.1 General mixing console functions

A mixing console fulls three main functions:

• Signal processing:

Preamplication

Microphones convert sound waves into voltage that has to be amplied

several-fold; then, this voltage is turned into sound that is reproduced

in a loudspeaker. Because micro phone capsules are very delicate in their

construction, output voltage is very low and therefore susceptible to

interference. Therefore, mic signal voltage is amplied directly at the mixer

input to a higher signal level that is less prone to interference. This higher,

interference-safe signal level has to be achieved through amplication

using an amplier of the highest quality in order to amplify the signal and

add as little noise to it as possible. The XENYX Mic Preamp performs this

role beautifully, leaving no traces of noise or sound coloration. Interference

that could take place at the preamplication level could aect signal quality

and purity, and would then be passed on to all other devices, resulting in

inaccurate sounding program during recording or playback.

Level-setting

Signals fed into the mixer using a DI-box (Direct Injection) or the output of a

sound card or a keyboard, often have to be adjusted to the operating level of

your mixing console.

Frequency response correction

Using the equalizers found in each channel strip, you can simply, quickly and

eectively adjust the way a signal sounds.

Eects mixing

In addition to the eects processor contained in your mixer, using the

insert connectors on the mono channels and both aux busses lets you insert

additional signal processors into your signal path.

• Signal distribution:

Individual signals adjusted at each channel strip are laid out at the aux

sends and returns, and are either fed into external eects processors or fed

back to the internal eects processor. Then, the signals are brought back

into the main mix either via the aux return connectors or via direct internal

wiring. The mix for the on-stage musicians is also created using the aux

sends (monitor mix). Similarly,for example, signals for recording equipment,

power ampli ers, headphones and 2-track outputs can also be taken.

• Mix:

All other mixing console functions fall under this vital category. Creating a

mix means primarily adjusting the volume levels of individual instruments

and voices to one another as well as giving them the appropriate weight

within the overall frequency spectrum. Likewise, you’ll have to sensibly

spread individual voices across the stereo image of a signal. At the end of

this process, adjusting the level of the entire mix to other equipment in the

signal path is required (e.g. recorder/crossover/amplier).

The interface of BEHRINGER mixing consoles is optimized for these tasks,

enabling you to easily keep track of the signal path.

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