Crest audio LM Technical Data Sheet

CENTURY SERIES

Technical Data

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

LM

Sheet

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

All specifications subject to change without notice. © 1997 Crest Audio Inc.

All information per

Crest Consoles Engineering,

May 5, 1997

KNOB HEIGHT 0.75"/19mm & 1.25"/32mm

2.375"/60mm

2.25"/57mm

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 light­ing 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 con­trols 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 con­trols 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 configura­tions. 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 pre­sent 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 occu­py 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 sup­plies 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

35°

29.563" / 751mm

Architect’s & Engineer’s Specifications - Century LM

29.625"/752mm

24.75"/ 717mm

28.0"/ 711mm

10.25"/260mm

6.25"/159mm

3.25"/83mm

1.125"/29mm

2.437"
62mm

9.5"

241mm

For use on an 11 inch x 17 inch sheet, print this page out at 130%

MONITOR A

Century LM Console Block Diagram

Crest Audio reserves the right to make changes or improvements

in manufacturing or design which may affect specifications.

RIGHT

M

GROUP PFL MIX R

MONITOR A

M

LEVEL

MIX

∑

MUTE

MONITOR A

FADER

INPUT

PFL

SW

INPUT PFL MIX R

GROUP PFL MIX L

EXT TB IN

OSC

(FRONT)

∑

∑

CREST AUDIO

CENTURY LM BLOCK DIAGRAM

LEFT

∑

OSC IN

1KHZ

EXT TB

OUT

PHONES

GROUP PFL DC

INPUT PFL MIX L

(FRONT)

OUT

(TOP PANEL)

PHONES

INPUT FADER MIX

INPUT PFL DC

EXT TB

LEVEL

TB MIC

MIC PRE

PHONES

(TOP PANEL)

∑

TB MIC

20 30 40

GAIN

EXT TB

IN

+

MONITOR B

RIGHT

+48v

OSC

M

LEVEL

TB

TB ON

GROUP MIX R∑GROUP MIX L

∑

MONITOR B

LEFT

M

MONITOR B

LEVEL

GROUP

MIX

D

6 - 60DB

Ø

PEAK

OPTION

GAIN

XFORMER

ABCD

PIN 1

LIFT

BAL MIC IN

+48V

15dB

PAD

LINE

PRESENT

SIGNAL

TO PEAK

LM INPUT MODULE

LEVEL

PFL

INPUT PFL DC

INPUT PFL

SAFE MUTE SCENE SELECT

ROTARY

PIN 2 HOT ON ALL XLRS

USER OPTIONS IMPLEMENTED WITH REMOVABLE SHUNTS

POT PAD LED AMP

P

DIRECT OUT

INSERT RETURN

INSERT SEND

P

BAL MIC OUT

BAL LINE IN

P

BAL DRIVER

LEGENDS

SWITCH

PFL METER

GROUP 12

METER

--

MUTE

PFL

SW

Ø

+

GROUP

MUTE

MUTE MASTERS

SCENE

B

C

A

OPTION

OUT

XFORMER

DIM

TB

RETURN

INSERT

GROUP

12

Ø

+10

M

FADER AMP

INSERT

SEND

INSERT

ON

SUB 12

LEVEL

SUB

ON

POST

SUB

PRESENT

SIGNAL

PEAK

GROUP 12

MIX AMP

∑

LM GROUP 12 / MASTER B MODULE

CUE SELECT

POST

PRE

PFL

GROUP PFL DC

GROUP PFL R

GROUP PFL L

OPTION

USER

FADER

FET MUTE

M

ELVIS

E

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.

SELECT - EACH SEND:

FOLLOW SWITCH

ALWAYS POST

ALWAYS PRE

SENDS ARE SINGLE ROTARY POTS AS

PER BLOCK C.

9-12

PRE

X 4

ALL MODELS

9 THRU 12

SENDS

BLOCK C

FOR MONO INPUT MODULES: ALL 12

X 4

EQ

SOURCE

SELECT

PRE

FDR

PRE SOURCE AMP

M

PRE

5-8

LEVEL

B

PRE

1-4

X 4

LM20 SHOWN

LEVEL

5 THRU 8

SENDS

LEVEL

BLOCK B

A

R

S

PREAMP

INPUT

HPF

LF L MID H MID HF SHELFSHELF

FOUR BAND EQ

FREQ

EQ IN

NO YES

FADER AMP

M

MUTE ?

+10

PRE

MUTE

LM8+4 SHOWN

1 THRU 4

SENDS

PAN

BLOCK A

L

*D4000002*

100 Eisenhower Dr., Paramus NJ 07652 USA

TEL

: 201.909.8700

http://www.crestaudio.com

RIBBON CABLES

GROUP SELECT R(B)

GROUP PFL DC

GROUP PFL R

R GROUP

MIX AMP

∑

PFL

FOR DUAL MONO GRPS: EACH SIDE (A & B ) HAS INDEPENDENT SWITCHES

AND LEDS FOR EACH FUNCTION, DUAL FADERS & NO MONO SWITCH.

+

FOR STEREO GROUPS: FOR EACH FUNCTION: ONE SWITCH /LED CONTROLS

BOTH CHANNELS (L & R). SINGLE STEREO FADER.

POST

PRE

CUE SELECT

(SHOWN ABOVE)

HPF

RIGHT(B)

METER



HPF

RIGHT(B)

SEND

INSERT

CIRCUITS

EQ IN

(SHOWN ABOVE)

THREE BAND EQ

INSERT

ON

RIGHT(B)

TO COMMON

SIG & PEAK

RETURN

INSERT

GROUP PFL DC

GROUP PFL R

GROUP 11

PRESENT

POST

ON

LEVEL

INSERT

SIGNAL

SUB

SUB

SUB 11

SEND

∑

INSERT

GROUP PFL L

PFL

CUE SELECT

LM GROUP 11 / MASTER A MODULE

DIM

GROUP

MUTE

Ø

XFORMER

OPTION

GROUP

METER

11



INPUTS

INPUTS

TB

M

FADER AMP

+10

Ø

GROUP

OUT

MASTER

+48V

MIX AMP

TB

DIM

XFORMER

OUT

PEAK

M

FADER AMP

+10

Ø

ON

RETURN

INSERT

GROUP

11

PEAK

PEAK

SIG

SIG

RTN 1

RTN 2

MUTE

MUTE

GROUP

MUTE

LEVEL

LEVEL

RTN 2

RTN 1

Ø

PFL 1

PFL 2

OPTION

RETURN

RETURN

1

2

RETURN

(A)

SUB

(B)

THREE BAND EQ

RETURN

INSERT

GROUP SELECT

1211

MIX AMP

GROUP

12

PEAK

PRESENT

SIGNAL

EQ IN

LF MF HF

INSERT

ON

GROUP PFL DC

GROUP PFL R

GROUP PFL L

∑

+ HPF

INSERT

SEND

PFL

LM MONO GROUP MODULE

CUE SELECT

HPF

20 - 400HZ

METER



R FADER AMP

XFORMER

OPTION

M

+10 Ø

RIGHT(B)

OUT

GROUP

12(B)

INPUTS

MONO

DIM

GROUP

MUTE

Ø

OPTION

SUB

TB

XFORMER

LEFT(A)

OUT

11(A)

M

+10

Ø

GROUP

RETURN

INPUTS

2

THREE BAND EQ - RIGHT

L FADER AMP

RETURN

LEFT(A)

GROUP SELECT L

1

LEVEL PAN

MIX AMP

GROUP

PEAK

LF MF HF

THREE BAND EQ - LEFT

INSERT

ON

INSERT

LEFT(A)

SEND

L(A)

PRESENT

SIGNAL

EQ IN

MONO

INSERT

GROUP PFL L(A)

GROUP PFL DC

∑

+ HPF

CUE SELECT

LM DUAL MONO GROUP MODULE

POST

PRE

HPF

20 - 400HZ

LEFT(A)

METER



PFL

LM STEREO GROUP MODULE

Printed in USA

FAX

Crest Audio Inc.

: 201.909.8744

v. 2.1 11/19/97