Crest Audio Century LM-20 Datasheet

Crest Audio
Brand
Crest Audio
Model
Century LM-20
Type
Datasheet

This manual is also suitable for

CENTURY SERIES
Technical Data
Sheet
LM
TECHNICAL SPECIFICATIONS
FREQUENCY RESPONSE
+0.0, -0.5dB, 20Hz to 20 kHz (referenced to 1kHz)
TOTAL HARMONIC DISTORTION
Mic input to Group output
20Hz to 20 kHz at +15dBu <0.01%
NOISE (22Hz to 22kHz)
Mic EIN -129 dBu
Group Output Noise (20 ch routed) -80 dBu
CROSSTALK (Measured at 1kHz)
Channel Mute >102 dB
Channel Fader Attenuation >96 dB
Channel Routing >85 dB
INPUT/OUTPUT IMPEDANCES
Mic Input 4kΩ balanced
Line Input >10kΩ balanced
Outputs 140Ω balanced
INPUT/OUTPUT LEVELS (0VU = +4 dBu, 1.23V RMS)
Mic Input Sensitivity +4 to -62 dBu
Line Input Sensitivity +12 to -38 dBu
Input Insertion Point Level +4 dBu
Output Insertion Point Level -2 dBu
Nominal Output Level +4 dBu
Maximum Balanced Output Level +28 dBu
CONFIGURATIONS
Century LM Consoles are available in the following configurations:
LM-12 (12 MONO OUTPUTS)
12, 20, 28, 32, 40, or 52 inputs
LM-20 (20 MONO OUTPUTS)
12, 20, 28, 32, 40, or 52 inputs
DIMENSIONS
The following table contains net dimensions
for all Century LM consoles. (L x W x H)
Frame Size Imperial Metric Weight
Net lbs./kg
24 34” x 29.63” x 9.5” 850 x 753 x 241mm 160/72.6
32 44” x 29.63” x 9.5” 1100 x 753 x 241mm 175/79.5
40 53” x 29.63” x 9.5” 1350 x 753 x 241mm 210/95.3
44 58” x 29.63” x 9.5” 1460 x 753 x 241mm 230/104.4
52 67” x 29.63” x 9.5” 1700 x 753 x 241mm 275/124.9
64 82” x 29.63” x 9.5” 2070 x 753 x 241mm 295/133.9
Architect’s & Engineer’s Specifications - Century LM
The live monitor console shall be constructed in a modular fashion and be housed in a steel frame with molded plastic side panels. The console shall be black with white labeling and utilize XLR light-
ing device connectors. All microphone inputs shall be electronically balanced and accessed via 3-pin XLR connectors and have an EIN of -129 dBm. All line inputs shall be electronically balanced and
accessed via 1/4” TRS jacks. The insert points shall have discrete send and return connectors. Each input channel shall have: a +48 volt phantom power switch, a -15 dB mic pad switch, a 100Hz high
pass filter switch, a polarity reverse switch and 4-band (LF-40-800Hz, LMF-100Hz-2kHz, HMF-400Hz-8kHz, HF-1.5k-20kHz) sweepable EQ with selectable peak/shelve settings on the high and low con-
trols and an EQ In switch. Each input channel shall also have: a FET controlled (10 millisecond ramp) mute switch with LED, A dynamic signal present LED and peak LED, 4 scene mute switches (A-D)
each with LED, scene mute safe switch with LED and a 100mm long throw fader. Each input channel shall have output send controls appropriate to the specified model. Each bank of four rotary con-
trols shall have an associated pre switch which shall be internally selected to operate as pre/post EQ or pre/post Fader; this selection shall apply to all three pre switches on the input. Each of the send
controls shall be internally selectable to operate in one of three modes: follow its associated pre switch, always pre or always post. The console shall be available in 12 output or 20 output configura-
tions. Each output shall have a ten-segment LED array, three-band sweepable EQ, EQ-In switch, variable high-pass filter, polarity reverse, insert switch, talkback enable, dim, peak & dynamic signal pre-
sent LEDs, local mute and PFL. The mono outputs shall have mono EQ, the stereo outputs shall have stereo EQ; while the dual mono outputs shall have stereo EQ but with separate A/B EQ In switches.
The master section shall be contained within mono outputs 11 and 12 and shall contain: a talkback system, scene mute master controls, return master controls and two stereo local monitor controls,
connections for headphones, talkback mics, external oscillators as well as indicators for power, input and output PFL. The standard power supply shall be housed in a 14 ga. steel chassis that shall occu-
py two 19” rack spaces. The power supply shall have the ability to be daisy-chained to additional power supplies to provide a fail-safe operating environment. Connection of two or more power sup-
plies shall not require additional interface hardware other than the provided cable. The live monitor console shall be: the Crest Audio Century LM.
Crest Audio specifications are available in electronic form on our website: http://www.crestaudio.com
2.25"/57mm
KNOB HEIGHT 0.75"/19mm & 1.25"/32mm
24.75"/ 717mm
28.0"/ 711mm
29.563" / 751mm
29.625"/752mm
10.25"/260mm
6.25"/159mm
3.25"/83mm
9.5"
241mm
2.437"
62mm
1.125"/29mm
2.375"/60mm
35°
All information per
Crest Consoles Engineering,
May 5, 1997
All specifications subject to change without notice. © 1997 Crest Audio Inc.
Century LM Console Block Diagram
Crest Audio reserves the right to make changes or improvements
in manufacturing or design which may affect specifications.
∑
R FADER AMP
GROUP
MUTE
METER
RIGHT(B)
PFL
GROUP PFL DC
GROUP PFL R
R GROUP
MIX AMP
GROUP
OUT
RIGHT(B)
M
CUE SELECT
GROUP SELECT R(B)
+
HPF
THREE BAND EQ
EQ IN
INSERT
ON
+10 Ø
BAL MIC IN
BAL LINE IN
INPUT
PREAMP
GAIN
6 - 60DB
FOUR BAND EQ
LEVEL
FREQ
LF L MID H MID HF SHELFSHELF
HPF
Ø
LINE
15dB
PAD
P
S
P
PRE
SOURCE
SELECT
PRE
MUTE ?
PFL
DIRECT OUT
+10
SAFE MUTE SCENE SELECT
ABCD
MUTE
INSERT SEND
+48V
EQ IN
PEAK
SIGNAL
PRESENT
TO PEAK
FADER AMP
M
M
PRE SOURCE AMP
EQ
FDR
NO YES
INPUT PFL DC
INPUT PFL
RIBBON CABLES
LM INPUT MODULE
XFORMER
OPTION
∑
SIGNAL
PRESENT
INSERT
SEND
XFORMER
OPTION
FADER AMP
PEAK
GROUP
MUTE
METER
PFL
GROUP PFL DC
GROUP PFL L
LM MONO GROUP MODULE
GROUP
MIX AMP
P
ROTARY
POT PAD LED AMP
SWITCH
USER
OPTION
FADER
M
FET MUTE
LEGENDS
LM GROUP 12 / MASTER B MODULE
TB ON
+48v
TB MIC
(TOP PANEL)
EXT TB IN
PHONES
LEVEL
PHONES
(TOP PANEL)
PHONES
(FRONT)
TB MIC
(FRONT)
OSC
EXT TB
IN
OSC IN
1KHZ
OSC
TB
LEVEL
SCENE
MUTE MASTERS
A
B
C
D
EXT TB
OUT
EXT TB
OUT
MIC PRE
CREST AUDIO
CENTURY LM BLOCK DIAGRAM
BAL DRIVER
PIN 2 HOT ON ALL XLRS
USER OPTIONS IMPLEMENTED WITH REMOVABLE SHUNTS
INSERT RETURN
BAL MIC OUT
5-8
PRE
1-4
PRE
SENDS
1 THRU 4
X 4
9-12
PRE
SENDS
9 THRU 12
X 4
LEVEL
PAN
LM8+4 SHOWN
SENDS
5 THRU 8
X 4
LEVEL
LEVEL
LM20 SHOWN
L
R
A
B
ALL MODELS
INSERT
RETURN
GROUP
OUT
M
CUE SELECT
SELECT - EACH SEND:
ALWAYS PRE
ALWAYS POST
FOLLOW SWITCH
E
ELVIS
PIN 1
LIFT
GROUP SELECT
SUB
INPUTS
RETURN
INPUTS
1211
(A)
12
(B)
+ HPF
20 - 400HZ
HPF
THREE BAND EQ
LF MF HF
EQ IN
INSERT
ON
+10
DIM
TB
Ø
Ø
∑
SIGNAL
PRESENT
INSERT
SEND
LEFT(A)
XFORMER
OPTION
L FADER AMP
PEAK
METER
LEFT(A)
PFL
GROUP PFL DC
GROUP PFL L(A)
LM STEREO GROUP MODULE
L(A)
GROUP
MIX AMP
INSERT
RETURN
LEFT(A)
GROUP
OUT
LEFT(A)
M
CUE SELECT
GROUP SELECT L
SUB
INPUTS
RETURN
INPUTS
1
+ HPF
20 - 400HZ
HPF
THREE BAND EQ - LEFT
LF MF HF
EQ IN
INSERT
ON
+10
DIM
TB
Ø
Ø
2
11(A)
12(B)
TO COMMON
SIG & PEAK
CIRCUITS
XFORMER
OPTION
INSERT
RETURN
RIGHT(B)
INSERT
SEND
RIGHT(B)
LEVEL PAN
THREE BAND EQ - RIGHT
(SHOWN ABOVE)
HPF
(SHOWN ABOVE)
MONO
MONO
FOR STEREO GROUPS: FOR EACH FUNCTION: ONE SWITCH /LED CONTROLS
BOTH CHANNELS (L & R). SINGLE STEREO FADER.
FOR DUAL MONO GRPS: EACH SIDE (A & B ) HAS INDEPENDENT SWITCHES
AND LEDS FOR EACH FUNCTION, DUAL FADERS & NO MONO SWITCH.
LM DUAL MONO GROUP MODULE
GAIN
20 30 40
∑
SIGNAL
PRESENT
INSERT
SEND
XFORMER
OPTION
FADER AMP
PEAK
GROUP
MUTE
GROUP
METER
11
PFL
GROUP PFL DC
GROUP PFL L
LM GROUP 11 / MASTER A MODULE
GROUP 11
MIX AMP
INSERT
RETURN
GROUP
11
OUT
M
CUE SELECT
INSERT
ON
+10
DIM
TB
Ø
Ø
GROUP PFL R
GROUP PFL R
SUB
POST
SUB
ON
SUB 11
LEVEL
RETURN
1
RETURN
2
RTN 1
MUTE
RTN 1
LEVEL
PFL 1
PFL 2
RTN 2
MUTE
RTN 2
LEVEL
SIG
PEAK
SIG
PEAK
+
INPUT PFL MIX L
∑
∑
INPUT PFL DC
PFL
SW
MONITOR A
LEVEL
INPUT
FADER
MIX
INPUT PFL MIX R
MUTE
MONITOR A
LEFT
MONITOR A
RIGHT
GROUP PFL DC
∑
∑
GROUP PFL MIX L
GROUP PFL MIX R
M
M
∑
INPUT FADER MIX
+48V
MASTER
MONITOR B
LEVEL
GROUP
MIX
MUTE
MONITOR B
LEFT
MONITOR B
RIGHT
M
M
∑
GROUP MIX R
∑
GROUP MIX L
∑
SIGNAL
PRESENT
INSERT
SEND
XFORMER
OPTION
FADER AMP
PEAK
GROUP
MUTE
GROUP 12
METER
--
PFL METER
PFL
GROUP PFL DC
GROUP PFL L
GROUP 12
MIX AMP
INSERT
RETURN
GROUP
12
OUT
M
CUE SELECT
INSERT
ON
+10
DIM
TB
Ø
Ø
GROUP PFL R
SUB
POST
SUB
ON
SUB 12
LEVEL
+
PFL
SW
POST
PRE
PRE
POST
PRE
POST
FOR MONO INPUT MODULES: ALL 12
SENDS ARE SINGLE ROTARY POTS AS
PER BLOCK C .
BLOCK C
BLOCK B
BLOCK A
FOR STEREO INPUT MODULES: FIRST 8
SENDS ARE DUAL-CONCENTRIC ROTARY
POTS. EACH OF THE EIGHT CAN BE
INDIVIDUALLY SELECTED BY INTERNAL
SWITCHES TO OPERATE IN STEREO
MODE (LEVEL/PAN) AS PER BLOCK A , OR
SET FOR DUAL-MONO OPERATION
(LEVEL/LEVEL) AS PER BLOCK B.
Crest Audio Inc.
100 Eisenhower Dr., Paramus NJ 07652 USA
TEL
: 201.909.8700
FAX
: 201.909.8744
http://www.crestaudio.com
Printed in USA
*D4000002*
v. 2.1 11/19/97
For use on an 11 inch x 17 inch sheet, print this page out at 130%
B
T
D
MUTE
PFL
PEAK
SIG
DIM
TB ENB
INSERT
ON
OUTPUT
+9
+6
+3
0
-3
-6
-9
-12
-15
-18
11
88
O+
11
88
O+
SU
INPUT
1
1
HF
LF
10
4
15
30
6
1
60
30
1
3
5
8
1
0
5
10
30
40
5
20
7
8
9
5
2
0
1
3
46
1
7
8
9
5
2
0
1
3
46
1
3
1
5
1
1
20
11
88
O+
MID
ø
EQ IN
HP
4
2
8
10
20
40
RETUR
1
2
7
8
9
5
2
0
1
3
46
1
7
8
9
5
2
0
1
3
46
1
OUTPUT
MUTE
PEAK
SIG
DIM
TB ENB
INSERT ON
OUTPUT
+9
+6
+3
0
-3
-6
-9
-12
-15
-18
16 16
88
O+
16 16
88
O+
SUB
INPUT
11
12
HF
LF
100
40
150
300
6
1K
600
300
1K
3
5
8K
7
8
9
5
2
0
1
3
46
10
7
8
9
5
2
0
1
3
46
10
3
1K
5
10
15
20K
16 16
88
O+
MID
Ø
EQ IN
HPF
40
20
80
100
200
400
RETURN
1
2
7
8
9
5
2
0
1
3
46
10
7
8
9
5
2
0
1
3
46
10
A
B
PFL
0
5
10
30
40
5
20
MUTE
PFL
PEAK
SIG
DIM
TB ENB
INSERT
ON
OUTPUT
+9
+6
+3
0
-3
-6
-9
-12
-15
-18
11
88
O+
11
88
O+
SUB
INPUT
1
1
HF
LF
10
4
15
30
6
1
60
30
1
3
5
8
1
0
5
10
30
40
5
20
7
8
9
5
2
0
1
3
46
1
7
8
9
5
2
0
1
3
46
1
3
1
5
1
1
20
11
88
O+
MID
ø
EQ IN
HPF
4
2
8
10
20
40
RETURN
1
2
7
8
9
5
2
0
1
3
46
1
7
8
9
5
2
0
1
3
46
1
20
10
6
30
60
100
40
150
3
6
800
250
100
400
1
2K
1K
400
1.5
3
6
8K
3
2K
4
10
20K
+48V
100
EQ IN
MUTE
PFL
PEAK
SIG
HM
LM
PAD
0
5
10
30
40
20
LF
GAIN
HF
PRE
PRE
4
PRE
7
8
9
5
2
0
1
3
46
10
7
8
9
5
2
0
1
3
46
10
7
8
9
5
2
0
1
3
46
10
7
8
9
5
2
0
1
3
46
10
7
8
9
5
2
0
1
3
46
10
7
8
9
5
2
0
1
3
46
10
7
8
9
5
2
0
1
3
46
10
7
8
9
5
2
0
1
3
4
6
10
7
8
9
5
2
0
1
3
46
10
7
8
9
5
2
0
1
3
4
6
10
7
8
9
5
2
0
1
3
4
6
10
7
8
9
5
2
0
1
3
46
10
SCENE
MUTE
SELECT
A
B
C
D
SAFE
LINE
ø
2
3
1
5
6
7
8
9
10
11
12
20
10
6
30
60
100
40
150
3
6
800
250
100
400
1
2K
1K
400
1.5
3
6
8K
3
2K
4
10
20K
+48V
100
EQ IN
MUTE
PFL
PEAK
SIG
HM
LM
PAD
0
5
10
30
40
20
LF
GAIN
HF
PRE
PRE
PRE
7
8
9
5
2
0
1
3
46
10
7
8
9
5
2
0
1
3
46
10
7
8
9
5
2
0
1
3
46
10
7
8
9
5
2
0
1
3
46
10
7
8
9
5
2
0
1
3
46
10
7
8
9
5
2
0
1
3
46
10
7
8
9
5
2
0
1
3
4
6
10
7
8
9
5
2
0
1
3
46
10
7
8
9
5
2
0
1
3
4
6
10
7
8
9
5
2
0
1
3
4
6
10
7
8
9
5
2
0
1
3
46
10
SCENE
MUTE
SELECT
A
B
C
D
SAFE
LINE
ø
7
8
9
5
2
0
1
3
46
10
5
6
7
8
1
2
3
4
9
10
11
12
INSERT RETURN
MONITOR A LEFT
BAL OUT
INSERT SEND
EXT TB IN
INSERT RETURN
MONITOR B LEFT
MONITOR B RIGHT
BAL OUT
INSERT SEND
OSC IN
MONITOR A RIGHT
BAL OUT
INSERT SEND
INSERT RETURN
RETURN 1
RETURN 2
EXT TB OUT
BAL OUT
INSERT SEND
INSERT RETURN
INSERT SEND
INSERT SEND
INSERT RETURN
BAL OUT LEFT
INSERT SEND
INSERT RETURN
BAL OUT LEFT
INSERT SEND
INSERT RETURN
BAL OUT LEFT
INSERT RETURN
BAL OUT RIGHT
BAL OUT RIGHT
INSERT RETURN
BAL OUT RIGHT
INSERT SEND
INSERT RETURN
BAL OUT LEFT
INSERT SEND
INSERT RETURN
BAL OUT RIGHT
INSERT SEND
INSERT RETURN
BAL OUT LEFT
INSERT SEND
INSERT RETURN
BAL OUT RIGHT
INSERT SEND
INSERT RETURN
BAL OUT LEFT
INSERT SEND
INSERT RETURN
BAL OUT RIGHT
INSERT SEND
INSERT RETURN
BAL OUT LEFT
INSERT SEND
INSERT RETURN
BAL OUT RIGHT
INSERT SEND
INSERT RETURN
BAL OUT LEFT
INSERT SEND
INSERT RETURN
BAL OUT RIGHT
INSERT SEND
INSERT RETURN
INSERT SEND
DIR OUT DIR OUT DIR OUT DIR OUT DIR OUT DIR OUT
DIR OUT
DIR OUT DIR OUT
DIR OUT DIR OUT DIR OUTDIR OUT DIR OUT DIR OUT DIR OUT DIR OUT DIR OUT DIR OUT DIR OUT DIR OUT DIR OUT DIR OUT DIR OUT DIR OUT DIR OUT DIR OUT DIR OUT DIR OUT DIR OUT DIR OUT DIR OUT
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
BAL INSRT RTN
INSRT SND
BAL MIC IN
BAL MIC OUT
LIFT
PIN 1
BAL LINE IN
Master Section
Outputs
Inputs
LM-12 INPUT MODULE
LM-12 OUTPUT MODULE
LM MASTER SECTION MODULES
LM 20 INPUT MODULE
LM-20 OUTPUT MODULE
LM
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Crest Audio Century LM-20 Datasheet

Crest Audio
Brand
Crest Audio
Model
Century LM-20
Type
Datasheet
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