Operating Elements & Connections; Mono Channels; Microphone And Line Inputs; Equalizer - Omnitronic LMC-1422FX Bedienungsanleitung

Operating Elements and Connections
4
OPERATING ELEMENTS & CONNECTIONS
This chapter describes the various control elements of
the mixing console. Differences between the models will
be indicated accordingly.

Mono channels

Microphone and line inputs

LMC-1422FX LMC-2642FX
LMC-2022FX
Fig. 4.1 Mic/line inputs
MIC input
Each mono input channel offers a balanced microphone
input via the XLR connector and also features switchable
+48 V phantom power
microphones. The preamps provide undistorted and
noise-free gain as is typically known only from costly
outboard preamps.
LINE input
Each mono input also has a balanced line input on a
6.3 mm jack. You can also connect unbalanced devices
using mono jacks to these inputs.
You can use either the microphone input or the
Note
line input of a channel, but not both at the same time.
INSERT input (model LMC-1422FX and LMC-2642FX)
Insert points enable the processing of a signal with
dynamic processors or equalizers. They are sourced
pre-fader, pre-EQ and
information on using insert points can be found in
chapter 5. On the LMC-1422FX console, these jacks are
located on the rear panel.
supply for condenser
pre-aux send. Detailed
GAIN control
Use the GAIN control to adjust the input gain. This
control should always be turned fully counter-clockwise
whenever you connect or disconnect a signal source to
one of the inputs.
Using the GAIN control, drive the signal to the 0-dB
mark. This way you have a vast amount of drive
headroom for use with very dynamic signals. The CLIP
display should light up only rarely, preferably never.
While fine-tuning, the equalizer should be set to neutral.
75Hz switch
The mono channels have a high-slope LOW CUT filter
for eliminating unwanted,
components (75Hz, 18 dB/octave).
Compressor
Each mono channel features a built-in compressor which
lowers the dynamic range of the signal and increases its
perceived loudness. The loudseaks are squashed down
and the quiet sections are boosted. Turn the COMP
control clockwise to add more compression effect. The
adjacent LED will light when the effect is engaged.

Equalizer

All models
Fig. 4.2 Equalizer
All mono input channels have a 3-band equalizer with
semi-parametric mid bands. All bands provide boost or
cut of up to15 dB. In the central position, the equalizer is
off (flat).
The circuitry of the British EQs is based on the
technology used in the best-known top-of-the-line
consoles and providing a warm sound without any
unwanted side effects. The result is extremely musical
equalizers which, unlike simple equalizers, cause no
side effects such as phase shifting or bandwidth
limitation, even with extreme gain settings of ±15 dB.
The upper (HIGH) and the lower (LOW) bands are
shelving filters that increase or decrease all frequencies
above or below their cut-off frequency. The cut-off
frequencies of the upper and lower bands are 12 kHz
and 80 Hz respectively. For the mid-range, the console
features a semi-parametric equalizer with a filter quality
(Q) of 1 octave, tunable from 100 Hz to 8 kHz. Use the
MID control to set the amount of boost or cut, and the
FREQ control to determine the central frequency.
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low-frequency signal