Feature Overview - Crest Audio CENTURY SERIES LMX Manual

LM
X

Feature Overview

• SSM/PMI High quality devices on balanced
microphone/line inputs and on all outputs for uncompro-
mised audio quality and reliability. All IC's within the audio
path are socket mounted for easy upgrade or service.
• A signal path completely free of electrolytic capacitors; all
internal audio connections are gold plated.
• Pad switches on XLR inputs allow preamplifiers to accept
signals from -62 to +7 dBu on mic and -44 to +10 dBu line.
• Separate 1/4" insert send and return jacks are provided for
patching outboard equipment.
• Passive microphone splitters with ground lift switches on
every microphone input.
• Switchable 48 Volt phantom power on all microphone
inputs; optional transformers available on all microphone
inputs and primary outputs.
• EQ section includes an EQ ON switch with LED and a
100Hz High Pass filter switch. Four sweepable bands (LF-40-
800Hz, LMF-100Hz-2kHz, HMF-400Hz-8kHz, HF-1.5k-
20kHz) are supplied with bell curves, providing full frequency
control with generous overlap. The HF and LF bands are selec-
table between Peaking and Shelving via internal jumpers.
• 5-LED display on input modules, logically placed next to
the fader, provides accurate monitoring of pre-fader input lev-
els.
• Input channels have level sends for the 22 output buses,
with dual concentric controls provided for buses 1-16 and sin-
gle controls for buses 18-20 and 21L/22R. These controls may
function as either 11 stereo sends with level and pan, 22 dis-
crete mono sends, or any desired combination of the two
modes. Global mono or stereo configuration for each bus is
determined by pushing a single button on the corresponding
output module.
• FET-controlled "soft" Mute switches on each input mod-
ule, which cut every selected send and output. Each input may
be assigned to any or all of the eight Mute Groups, and assign-
ments are clearly indicated by associated status LEDs.
Engaging the Safe switch defeats the module's group mute
function without changing the console setup.
• Output EQ - Each of the Group Output modules incorpo-
rates a dedicated stereo EQ section with three overlapping
swept bands (40Hz - 1kHz, 300Hz - 8kHz, 1kHz - 20kHz ),
odd & even EQ In/Out switching with status LEDs, and
switchable High Pass Filters with a corner frequency sweep-
able from 20Hz to 400Hz.
• Input for Room Ambience Microphones - Dedicated Stereo
Mic Input section (located on the upper part of the Stereo
21L/22R output module), allows routing of room ambience
microphones to in-ear monitoring systems. Includes a low-
noise dual preamplifier with gain control, pad, polarity reverse
switch, phantom power switch, mic/line input switch, stereo
input EQ section with two overlapping swept bands, EQ in/out
switching, and a 100Hz roll-off High Pass Filter.
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During quieter pauses between performances, an integrated
compressor-gate automatically opens the room ambience
microphones. When the performance resumes, the auto-control
processor gradually engages compression over a wide range,
smoothly reducing ambience level in proportion to the increase
in stage sound until mics are gated off at nominal performance
level. All eleven output modules have individual dual concen-
tric level controls (switchable for mono or stereo mode) to feed
the Stereo Mic inputs into the Monitor outputs.
• The L/R to Group section, located on each Group Output
module, can be used to re-matrix the 21L/22R output's mix
back into any or all of the other ten stereo or twenty mono out-
puts. A second subgroup feature allows any or all signals on
the first 20 mono/10 stereo buses to be assigned to the L/R
Master module, providing the flexibility required for alternate
use as an FOH console. The two subgroup modes are inter-
locked to prevent inadvertent feedback loops.
• Line In with Level controls, On/Off switching and Solo
switching on each of the ten Group Output modules. The line
inputs can be used as summing inputs or simple effects returns.
• Full-size meter bridge with large, sunlight-visible mechani-
cal VU meters. Metering provided for all 22 output buses plus
the stereo solo bus. Meters are solid state LED illuminated.
• Master Section provides a full bandwidth (20Hz - 20kHz)
oscillator, pink noise generator, headphone output level con-
trol, monitor on/off switch, and Talkback functions. A 100mm
fader is featured for main monitor level. Adjoining the fader
are switches to select monitor source. Source options are either
external stereo, or summing of the monitor output to mono,
and selecting a mix of all input faders for routing to the moni-
tor output.
• A Volume Foot Pedal (and rear panel connection jack) are
provided. The foot pedal connects in series with the Monitor
Output fader.
• Comprehensive, logic-controlled Solo system.
- Normal and input priority modes
- Choice of summing and 'last pressed' mode
- Choice of PFL and AFL audio in stereo
• 52 and 64 module position frames, constructed of pre-plat-
ed 14-gauge steel. Any frame size may be ordered short loaded
for later expansion.
• UL/CE-approved external power supply over-designed
with ample current reserves. For the ultimate in fail-safe relia-
bility, a back-up power supply can be linked to the primary
supply with only an inexpensive jumper cable. External
switching is not needed.
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ENTURY ERIES