Introduction; General Mixing Console Functions; The User's Manual - Behringer EURORACK UB1222FX-PRO User Manual

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EURORACK UB1222FX-PRO User Manual

1. Introduction

Congratulations! In purchasing the BEHRINGER EURORACK you have acquired a
mixer whose small size belies its incredible versatility and audio performance.
The BEHRINGER EURORACK mixing console offers you premium-quality
microphone preamplifiers with optional phantom power supply, balanced line
inputs and the ability to connect external effects devices. Because of its extensive
and carefully thought-out routing possibilities, your EURORACK lends itself
equally to both live and studio use.
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.
IMP "Invisible" Mic Preamp
The microphone channels are fitted with BEHRINGER's brand new high-end IMP
INVISIBLE MIC PREAMPs that 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 finest nuances
•
the extremely low-noise and distortionless circuitry gua rantees absolutely
natural and transparent signal repro duction
• they are perfectly matched to every conceivable micro phone with up to
60 dB gain and +48 volt phantom power supply and
• they enable full utilisation of the greatly extended dynamic range of your
24-bit/192 kHz HD recorder, thereby main taining optimal audio quality
Additionally, your UB mixing console has an effects processor with 24-bit A/D
and D/A converters included, which gives you 100 presets producing first-class
reverb, delay and modulation effects plus numerous multi-effects in excellent
audio quality.
The mixing consoles of the PRO series feature a state of the art, integrated switch-
mode power supply. One of the great advantages is that (compared to
conventional circuits) a switch-mode power supply adapts to mains voltages
between 100 and 240 volts automatically. Furthermore, due to its much greater
efficiency, it consumes much less energy than a conventional power supply unit.
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 PHIONES 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 fulfils three main functions:
• Signal processing:
Preamplification
Microphones convert sound waves into voltage that has to be amplified
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 amplified 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 amplification
using an amplifier of the highest quality in order to amplify the signal
and add as little noise to it as possible. The IMP "Invisible" Mic Preamp
performs this role beautifully, leaving no traces of noise or sound coloration.
Interference that could take place at the preamplification level could affect
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
effectively adjust the way a signal sounds.
Effects mixing
In addition to the effects 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 effects processors or fed
back to the internal effects 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 fiers, 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/amplifier).
The interface of BEHRINGER mixing consoles is optimized for these tasks,
enabling you to easily keep track of the signal path.

1.2 The user's manual

The user's manual is designed to give you both an overview of the controls,
as well as detailed information on how to use them. In order to help you
understand the links between the controls, we have arranged them in groups
according to their function. If you need to know more about specific issues,
please visit our website at http://behringer.com. Additional information and
explanations about various music industry/audio technology terminology can be
found on individual product pages as well as in the glossary in the ULTRANET area
of behringer.com.
◊
The block diagram supplied with the mixing console gives you an
overview of the connections between the inputs and outputs, as well
as the associated switches and controls.
For the moment, just try and trace the signal path from the microphone input
to the MON SEND connector. Don't be put off by the huge range of possibilities;
it's easier than you think! If you look at the overview of the controls at the same
time, you'll be able to quickly familiarize yourself with your mixing console and
you'll soon be making the most of all its many possibilities.