Crest audio VX 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
Mix Bus Output Noise (20 ch routed) - 80 dBu
Aux Bus Output Noise (20 ch routed) - 80 dBu

CROSSTALK (Measured at 1kHz)

Channel Mute >102 dB
Channel Fader Attenuation > 96 dB
Channel Routing > 85 dB
Channel Aux Send Attenuation > 93 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

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

Load support recommendations have been
supplied to assist in road case construction.

Vx

Sheet

CONFIGURATIONS

All Century Vx Consoles are available with optional stereo input modules.

Century Vx Consoles are available in the following configurations:

EIGHT SUBGROUP - 20, 32, 40, OR 52 INPUTS

D IMENSIONS

The following table contains net dimensions

for all Century Vx consoles. (L x W x H)

Frame Size Imperial Metric Weight

32 44" x 30.21" x 12.75" 1100 x 767 x 324mm 146/66.3
44 58" x 30.21" x 12.75" 1460 x 767 x 324mm 230/104.4
52 67" x 30.21" x 12.75" 1700 x 767 x 324mm 275/24.9
64 82" x 30.21" x 12.75" 2070 x 767 x 324mm 295/133.9

30.21"/767mm

31.14" / 791mm

SUPPORT ACROSS THIS DIMENSION IS RECOMMENDED

24.75" / 629mm

28.0" / 711mm

29.5625" / 751mm

DO NOT APPLY ANY
LOADS TO METER
BRIDGE ASSEMBLY

1.30"/ 33mm

4.8125"
122mm

4.5625"
116mm

2.25"/57mm

All information per

Crest Consoles Engineering,

May 5, 1997

19" / 483mm

KNOB HEIGHT, .75"/19mm & 1.25"/32mm

2.375"/ 60mm

SUPPORT ACROSS

THIS AREA IS

RECOMMENDED

35°

Net lbs./kg

.65"/17mm

10°

12.5625"
319mm

5.125"

130mm

12.6875"
322mm

The Vx live sound console shall be constructed in a modular fashion and be housed in a steel frame of (32, 44, 52, or 64) module positions. Vx Consoles shall include an 8 channel VCA level control sys­tem as well as an 8 channel audio subgroup system. The console shall utilize XLR-type lighting device connectors with dimmer system. A meter bridge using mechanical meters with solid state illumi­nation shall be included. Signals to be monitored include Left, Right, Mono (Center), Stereo Solo and 8 Group output signals. On 52 and 64 module position frames, 8 Auxiliary output meters are also
provided. The Vx live sound console shall feature a defeatable Left-Center-Right (LCR) panning system on input and group modules. • On each input channel: all microphone inputs shall be electroni­cally balanced and accessed via XLR connectors and have an EIN of -129 dBm. All input channel line inputs shall be electronically balanced and accessed via 1/4" TRS jacks. Input module insert and
return points shall be via individual 1/4" jacks and controlled by a front panel switch with LED. Additional input controls include: a +48 volt Phantom Power switch, a -15 dB Pad switch (-20 dB for stereo
input channels), adjustable High Pass Filter control (20-400Hz) with on switch and LED, a Polarity Reverse switch with LED, and 4-band sweep EQ (LF- 40-800Hz, LMF- 100Hz-2kHz, HMF- 400Hz-8kHz,
HF- 1.5k-20kHz) with Peak/Shelve switches on the high and low EQ bands, switchable bandwidth on low-mid and high-mid bands, and an EQ In switch with LED. Each input channel shall also have a
FET-controlled Mute switch with LED, affecting all assigned outputs including Auxiliary sends. The mute system may be defeated to the auxiliary sends by use of an internal jumper system. Assignment
switching is provided to the following output sections: Left/Right, Mono, Subgroup 1, 2, 3, 4, 5, 6, 7 and Subgroup 8. An LCR switch shall reconfigure the Left/Right and Mono assignment system to a
true Left-Center-Right mix system. A Pan On switch will allow conventional panning between any odd and even subgroup assignment regardless of the position of the LCR configuration switch. A 5­segment Signal level LED indicator will be provided on Mono input modules, including a multiple sample point peak LED to monitor signal levels. Input modules will also include a Solo switch with LED
indicator, 8 VCA group assignment switches, 4 Scene Mute preset switches, Scene Mute Safe switch with LED, and a 100mm fader. Each input channel shall have eight Auxiliary send level controls. Each
Aux Send shall have the ability to be turned on and off by pressing its associated send knob. A bi-color LED will indicate the status of the send: Green=Aux switched on, Red=Aux switched on but send
muted, LED Off=Aux switched off. Signal source of each Aux mix bus is normally post channel fader but may be globally changed to a pre fader source from eight individual switches within the master
section. Individual channels may be removed from the global pre/post fader signal source as well as Aux Mute control by a series of internal jumpers on each input module. • The 8 VCA group assign­ment switches will allow each channel to be controlled by any or all of the VCA group faders. A VCA bi-color LED will show VCA control voltage with increasing green intensity, and will turn red when
VCA control limiting is reached. The Aux sends shall be globally switchable pre or post fader with internal jumpers to select pre or post EQ and pre or post mute. There shall be an Aux 8 Direct switch
that allows the Aux 8 send knob directly to control the output of the 1/4" direct output connector. There will also be an Aux 8 Pre switch which allows Aux 8 to be switched pre fader independently of
the global switch. Optional Stereo input modules with similar features will be available. • Each Group module shall have VCA Group and Audio Group mixing sections, and a Matrix section. The VCA
Group section shall have a Mute switch and Unity LED indicator. • The Audio group mix section of the module shall have a Pan control, a Mute switch with LED, Matrix meter switch, assignment switch­es for Left/Right and Mono with an LCR configuration switch, a Fader Reverse switch with LED that allows the group fader to control the level of the matrix output, a Solo switch, dynamic signal pre­sent LED and peak LED, and a 100mm fader. Each Audio Group mix section will have group insert connections. • The Matrix section shall have controls for Group to Matrix Levels (G1-G8), L/R level to
Matrix, Mono and External level to Matrix, Talkback to Matrix (w/LED), Peak/Signal level LED. The Matrix section shall also have a Stereo Program switch (w/LED) to switch the L/R signal source to the
Stereo Program input, a Solo switch, and a master Matrix Out level control. • The master section shall have the following features: eight Aux master controls with associated Global Pre, Solo and Mute
switches, a 100mm fader for each of the Left, Right, and Mono (Center) master outputs with insert connections, an assignable Talkback system, Monitor control system (with balanced XLR output),
Stereo Program input section with EQ, and a Scene Mute Master switch section, each with LED. • The power supply shall be housed in a 14 gauge steel chassis and provide ±20V, +24V, and +48V to
the console. The power supply shall have the ability to be daisy-chained to additional power supplies to provide a redundant operating environment. Connection of two or more power supplies shall
not require additional hardware other than an interface cable. The live sound console shall be: the Crest Audio Century Vx.

Architect’s & Engineer’s Specifications - Century Vx

Crest Audio specifications are available in electronic form on our website: http://www.crestaudio.com

EXT TB

OUT

x0.2-x2

FREQ

NOISE

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

Century Vx Console Block Diagram

Crest Audio reserves the right to make changes or improvements

in manufacturing or design which may affect specifications.

EXT TB

OUT

AUX MASTER

MUTE

A

BCD

MUTE SCENE

INDICATORS

AUX SOURCE SELECT

FOR STEREO PGM IN

AUX 7-8

DIMMER

LAMP

+20V -20V +48V +24V

PINK

D

AUX 5-6

STATUS LEDS

*D3000002*

PFL

ON

TO SOLO

BUSES

SOLO

100 Eisenhower Dr., Paramus NJ 07652 USA

TEL

: 201.909.8700

http://www.crestaudio.com

FAX

: 201.909.8744

Printed in USA

TAPE IN

JACKS

TO

Crest Audio Inc.

(FRONT)

MIC

TB

OSC

LEVEL

OSC

OSC

ON

MASTERS

SCENE

MUTE

A - D

MONO

AUX 1-2

AUX 3-4

∑ ∑

LF HF

LF HF

(TOP)

100

1K 10K

ABC

MUTE

LEVEL

BAL

GAIN

IN

MIC

TB

ON

TB

MASTER/SLAVE

L-R

STEREO

PROGRAM

STEREO

IN

POWER ON/OFF

PHANTOM

+48v

LEVEL

TB

TB IN

∑

MONO L-R GROUPS AUXES

TB ASSIGN SWITCHES

1 2 3 4 5 6 7 8

MONO BAL

MIX AMP

PRESENT

SIGNAL

FADER AMP

MATRIX

POST

SIG / PEAK

EXT TB

EXT

∑

INSERT

MUTE

OPTION

BAL OUT

MONO

XFORMER

MONO

PEAK

(FRONT)

METER

PHONES

+ 48V DC

1A

XCPS-60

LINK

(TOP PANEL)

PHONES

SOLO

Vx MONO MODULE

GROUND

LEVEL

PHONES

DIM

+
24V DC

6A

MON RIGHT

LOCAL

D

INTERNAL OPTION

MUTE

BUSES

SOLO

PRE

SLAVE CONNECTOR

120V 60Hz

AC IN *

+

20V DC

6A

+20 -20 +24 +48

OUTPUT

MON LEFT

LOCAL

MUTE

MONO

D

GLOBAL

PRE

LOCAL

SOLO

SIG / PEAK

METER

OUTPUT

L / R + CENTER

MONITOR SOURCE SELECT

TAPE

MON LEVEL

LOCAL

AUX BAL

MIX AMP

∑

MASTER AUX OUT

AUX

MUTE

AUX OUTPUT 3-5-7 (4-6-8)

*OPTIONS: 220/240V 50Hz 100V 50Hz

XCPS-60

∑

∑

RIGHT

INTERNAL OPTION

LOCAL

MUTE

BUSES

SOLO

PRE

SIG / PEAK

METER

OFF

SLAVE

+ 48V DC

1A

GROUND

LINK

HEADPHONE SOURCE SELECT

DC

DEFEAT

SOLO

LEFT RIGHT

SOLO

LEFT

BUSY

MUX-DEMUX

TO METER

GLOBAL

PRE

SOLO

MASTER

+ 24V DC

6A

RIGHT

-

L / R + CENTER

∑

TAPE

MONITOR

SOLO TO

SOLO

DC

AUX BAL

MIX AMP

∑

AUX 1(2)

MASTER

MUTE

AUX OUTPUT 1 (2)

XFORMER

OPTION

AUX OUT

120V 60Hz

AC IN *

+20 -20 +24 +48

OUTPUT

LEFT

TAPE IN

+-+

∑

SOLO

RIGHT

LEFT

RIGHT

LEFT-

SOLO

EQ

AUX A (B)

STEREO

RIGHT

± 20V DC

6A

STEREO PROGRAM

MONO MODULE

IN FROM

MONOL / R

DEFEAT

RIGHT

SIG

MATRIX

POST

MONO

MUTEMONO

STEREO

POST

PEAK

LEFT

OUTPUT

SOLO

AFL

LEFT

AFL

AUX A (B)

METER

AUX A (B)

STEREO

MUTE

STEREO

STEREO

(SHOWING OPTIONAL TWIN UNIT AUTO BACK-UP)

VX POWER SUPPLY

Vx MASTER MODULE

VCA ASSIGN

1-8

8

LEFT

RIGHT

SOLO TYPE

LEFT

RIGHT

DC

PFL

∑

OUTPUT

MUTES

A - D

L (R) BAL

MIX AMP

INSERT

XFORMER

OPTION

LEFT(RIGHT)

Vx LEFT (RIGHT) MODULE

ENABLE

SLAVE

SCENE

SELECT

RIGHT

CHAN MUTE

MASTER/

MUTE

SAFE

ABC D

PGM

STEREO

LEFT

CH MUTE

DIRECT

SIG / PEAK

DC

MUTE

AUX 8

VCA

MUTE

LOGIC

PRE-POST

8

PUSH ON/OFF

–

MONO

EXT IN

SOLO

GROUP

FADER

BUFFER

MUTE

1

GLOBAL

PRE

AUX MUTE

+

8

EXT

MATRIX

POST

VCA

VOLTAGE

UNITY

DIRECT OUT

FADER

VCA

AUX 8 DIR ONLY

EQ FDR

SOURCE 2

SELECT

PRE

DIP SW

CH MUTE

(AUX 2-7 SAME AS AUX 1)

BUS

AUX 8

AUX 8 SEND

567

SUM AMP

MATRIX

∑

MUTE

VCA GROUP

BAL INSERT RTN

PRE

POST

∑

VCA

LED

PRE SOURCE AMP

PRE-POST

GLOBAL

1

PUSH ON/OFF

AUX MUTE

AUX 1 SEND

–

+

(INTERNAL SWITCH)

INSERT ON

GROUP OR

MATRIX

GROUP/MATRIX

REVERSE

METER

OPTION

XFRMR

MATRIX

OUT

PRE-AMP

SELECT

METER

M

MUTE

CH

DIP SW

BUS

OFF = AUX OFF

RED = ON+MUTED

GREEN = ON

1

234

CHANGE-OVER

INSERT

FADER

SELECT

MATRIX

INSERT SEND

+80-6SIG

PEAK

SOURCE 1

SELECT

PRE

NO YES

MUTE INDICATOR

–

ENABLE

TB

GROUP MIX

MATRIX

METER

METER

PREAMP

INPUT METER

EQ

FDR

MUTE ?

PRE

LCR PAN

ON - OFF

MONO

ASSIGN

+–+

SOLO

P

INPUT

ASSIGN

+

MONO

BAL LINE IN

S

HPF

SHELF

PEAK/

LF L MID H MID HF

FOUR BAND EQ

QQ

SHELF

PEAK/

PRE

VCA

M

POST

PAN

L-R

SOLO

–

BUS

IN

POST

PRE/

LCR

ON

L - R

LINE

EQ IN

2180 VCA

GROUP PAN

ON-OFF

∑

MATRIX

FEED

P

INSERT

Ø

FREQ

–

1-8

BAL MIC IN

OPTION

PAD

20 - 70dB

GAIN

20 - 400Hz

HPF

+

GROUP

ASSIGN

PAN

XFORMER

15dB

LEVEL

POST

MUTE

INSERT

RIGHT

FADER

{

POST

LEFT

SOLO

SIG / PEAK

GROUP

AUDIO GROUP

OPTION

XFRMR

GROUP OUT

ROTARY

POT

+48V

BI-COLOR

LED

SUMMING

AMP

BAL DRIVERDUAL POT

Vx INPUT MODULE

OPTION

USER

FADER

PADLED AMP SWITCH

FET MUTE

FET DIM

FEMALE

XLR

MALE

XLR

DIP SWITCH

OPTION

•USER OPTIONS IMPLEMENTED WITH

REMOVABLE SHUNTS

AUDIO

GROUPS 1-8

GROUPS 1-8

GROUPS 1-8

LEFT
MONO
RIGHT

LEFT
RIGHT
DC
LEFT
RIGHT

MATRIX

GROUPS 1-8

LEFT
MONO
STEREO
RIGHT

CONTROL
& POWER

Vx GROUP MODULE (1 OF 8)

∑

LEGENDS

P

M

D

USER

•PIN 2 HOT ON ALL XLRS

•TIP IS SEND, RING RETURN ON ALL

SINGLE-JACK INSERTS

VCA

AUX

MAIN

MAIN BUSES

{

PFL AFL

SOLO

{

OUTPUTS

PGM

DC

v. 2.1 11/19/97