Stereo Channels; Channel Inputs; Equalizer; Aux Sends - Omnitronic LMC-1422FX Bedienungsanleitung

Operating Elements and Connections

Stereo channels

Channel inputs

LMC-2022FX LMC-2642FX
Fig. 4.5 Stereo channel inputs
Each stereo channel has two balanced line level inputs
on 6.3 mm jacks for left and right channels. Channels
9/10 and 11/12 on the LMC-2642FX feature an
additional XLR microphone jack with phantom power. If
only the left jack (marked "L") is used, the channel
operates in mono. The stereo channels are designed to
handle typical line level signals, and, depending on the
model, have a level switch (+4 dBu or -10 dBV) and/or a
line GAIN control. Both jack inputs will also accept
unbalanced connectors.
GAIN control and 75Hz switch (model LMC-2642FX)
These two control elements operate on the XLR
connectors of the LMC-2642FX, and are used to filter
out frequencies below 75Hz (LOW CUT) and to adjust
microphone levels (GAIN).
LEVEL switch (model LMC-1422FX and LMC-2022FX)
For level matching, the stereo inputs have a LEVEL
switch to select between +4 dBu and -10 dBV. At -10
dBV (home recording level), the input is more sensitive
than at +4 dBu (studio level).

Equalizer

The stereo channels feature a stereo EQ section. The
cut-off frequencies of the high and low bands are 12 kHz
and 80 Hz respectively, while the center frequencies of
the high-mid and low-mid bands are 3 kHz and 500 Hz
respectively. The HIGH and LOW controls have the
same characteristics as the EQ in the mono channels.
Both mid-range bands are of the peak filter type. A
stereo EQ is superior to two mono EQs on a stereo
signal as two separate EQs will usually result in a
discrepancy between left and right channels.

Aux sends

In principle, the aux sends of the stereo channels
function the same way as those of the mono channels.
As the aux sends are mono, the send from a stereo
channel is first summed to mono before it reaches the
aux bus.

Channel fader, BAL, MUTE and SOLO

LMC-2022FX
Fig. 4.6 Balance control and mute switch
Balance control
The balance control determines the levels of the left and
right input signals relative to each other before both
signals are routed to the left/right main mix bus (or
odd/even subgroup).
The remaining control elements in the stereo channels
perform the same functions as their counterparts in the
mono channels (MUTE switch, MUTE and CLIP LEDs,
SOLO switch, SUB and MAIN switches and channel
fader).
31