Crest audio V12 User manual

side-car master fader

• front-of-house console with secondary-applications—a full-facility

monitor console capable of generating up to 28 monitor-mixes

• four-band full-parametric eq on both mono and stereo input modules—HF

and LF frequency bands are switchable between bell- and shelving-curves

• sweepable 18db high-pass filters on both mono and stereo input modules

• twelve VCA masters—dual THAT- VCA elements used throughout

• sixteen aux mixes, with eight switchable between mono and stereo

operation—aux controls include on/off and pre/post fader switching

• stereo solo-system includes last-pressed, momentary, and cumulative

(default)solo switch operation—plus normal, input priority and

input solo-in-place operating modes

• solo system may be switched between stereo AFL and PFL source modes

• solo-isolate switch is available for use when multiple consoles

are linked together—master SOLO CLEAR switch is provided

• direct-output system optimized for use in live-performance recording,

or for use in expanded-operation as a monitor console

• discrete bus assignment to groups, left/right and mono outputs

• true LCR panning available on mono input channels

• five-segment level meters on mono and stereo input modules

(separate left and right meters on stereo input modules)with variable-

intensity SIGNAL PRESENT indicator and multiple sample-point PEAK indicator

• full-time pre-fader signal-monitoring of analog groups,

aux, and matrix pre-level output controls

• output meter bridge provided as standard

• all balanced inputs and outputs utilize gold-plated connectors,

including both balanced insert-send and -return connectors

• fully-balanced internal busing to minimize or eliminate

most types of external interference

• internally-illuminated switches used throughout, with

separate dimmer controls for switches and external lighting system

• group swap-controls re-map group/aux/matrix operations

to accommodate use as a front-of-house, monitor, or matrix mixer

• eight-mono and four-stereo matrix outputs, plus four ALTERNATE OUTPUTS

which may be operated in mono or stereo

block diagram

dimensions

description features

When your professional live-sound reputation is on the line,

Crest Audio’sV12 becomes your secret-weapon: delivering

bullet-proof quality and reliability in a superlative front-of-house

or monitor console. V12 includes those features most-desired by

touring and permanent-installation engineers. Full-parametric eq

is provided on all input channels. A wealth of outputs are available

for unexpected situations. Gold-plated connectors and balanced-cir-

cuitry are provided, both internally and externally, for long-term

interference-free operation

sound fundamentals

The sonic performance of the V12 is sure to please discriminating

sound engineers and audiences alike, even when the console is

pushed hard in demanding applications. In order to maintain

high-headroom with low-noise,V12 circuits exclusively employ the

latest-generation of integrated circuits

(

operated on +/-20 volt rails

)

and studio-grade proprietary-design microphone pre-amplifiers.

Dual-VCA elements are the best available from THAT Corporation,

offering improved performance over single-element VCA designs.

Phase-shift has received special attention in the design, revealing less

than five-degrees of phase-shift on lower frequencies and less than

18-degrees on upper frequencies—better performance than that

observed in significantly more-expensive consoles.

wide range of configurations

V12 consoles are supplied with either 24, 32, 40, and 48 mono input

channels, plus four full-featured stereo mic/line input channels. Basic

configurations for all consoles include Master and Group modules,

plus four stereo-input modules that may be used as effect-returns.

All other inputs may be individually-ordered as mono-mic/line or

stereo-mic/line modules. An optional expansion-system enables the

addition of up to two 28-input side cars. Up to three V12 chassis

may also be linked together for single-console operation.

muting systems

Three-types of mute systems provide the appropriate mute

system for any application. Microprocessor based systems may be

disabled for total manual mute operation. The V12 microprocessor

mute system was co-developed with JL Cooper, insuring utmost

reliability and industry-standard operation methods.

V12 console

side-car

V12 input expansion capabilities

The V12 console’s input capacity may be increased in a number of ways.

The first method is simple substitution of stereo modules for mono modules.

There is no restriction as to the quantity or location of any modules, except

for the 66-position frame, which is restricted to no-more-than 28 stereo-input

modules

(

including the four stereo modules that are provided as standard on

all V12 configurations

)

The second-method links multiple V12 chassis together, using the optional

internal-linking electronics and multi-way cable system. Up to three-chassis

may be linked together, making up to 156-inputs available. While all functions

link-together, specific functions may be selectively-isolated, including the very

important solo-functions where multiple operators may not wish to disturb

other members of the mixing team operating on master or slaved consoles.

This functionality is accomplished via a conveniently-located front-panel

solo-isolate switch.

The third-method employs the V12 expander-frame system. This is a 28

input-position frame that also includes a two-wide master section—delivered

with all mono input modules, but optionally configured with any number of

stereo modules. Up to two-sidecars can be connected to a master chassis,

making available up to 108 input-positions. When three 52-input V12 chassis

are linked with two 28-input side-cars, up to 212 input-module positions are

then available for use within this single-console system.

The inclusion of a master section allows a side-car to be used as a limited-

function stand-alone mixer or to allow the local-control of selected outputs,

such as effect sends, whose feeds may be isolated from the master console.

The side-car provides, in addition to master control from the main console,

four local-VCA group channels, eight local-aux outputs and local left/right/mono

outputs. These features are especially useful when the console is used as a

drum or orchestra mixer.

master modules 1+2

built to defy murphy’s law

V12 consoles are constructed to endure the rigors of the road.

A segmented mother-board system is employed, thoroughly shock-

mounted from the multi-walled chassis. Despite being extremely-rigid,

the V12 console is amazingly light. Gold-plated interconnects and con-

nectors are used throughout, delivering impeccable performance in

even the most harsh environments.

also available without microprocessor system

v. 1.0 1/24/00

specifications

Crest Audio specification literature is available

in downloadable PDF format at our website

www.crestaudio.com

improvements in manufacturing or design

which may affect specification.

V12

modules fader bay

master-1 module

input faders

group output module

main output module

mono input module

microprocessor faders

V12 console rear view

master-2 module

stereo input module

+0/-0.5dB 20Hz–20kHz ref 1kHz—any input to any output

any output <.01% THD 20Hz–20kHz @ +15dBu out

mic ein better-than -129dBu 20Hz–20kHz—150ohm source, 60dB gain

channel mute >90dB channel routing >80dB

channel fader attenuation >90dB aux send attenuation >80dB

< +10/-20 degrees, 20Hz–20kHz—mic-in to main-out

mic-in XLR 4k ohm balanced—max voltage gain to left/right balanced out = 92dB

line-in TRS >10k ohms balanced with dedicated balanced line buffer

left/right/mono—group, aux, matrix—monitor-out all 100 ohms balanced

headphones to drive > eight-ohms

send 50 ohms balanced on TRS jack

return >10k ohms balanced on TRS jack

+4dBu max level +28dBu balanced into >1k ohms

high freq +/- 15dB frequency range 1kHz–20kHz Q variable 3.0–0.7 switchable to shelving

high-mid freq +/- 15dB frequency range 400Hz–8kHz Q variable 3.0–0.7

low-mid freq +/- 15dB frequency range 100Hz–2kHz Q variable 3.0–0.7

low freq +/- 15dB frequency range 40Hz–800Hz Q variable 3.0–0.7 switchable to shelving

eight-segment LED ladder with VU-type response—top red-LED warns of impending overload

anywhere within the channel—lowest green-LED shows signal-present—source is globally-switchable b/w pre- and post-fader

21 mechanical VU-type meters, with solid-state meter illumination (eight LED-ladders used on 42 and 50 frame sizes)

two-banks of eight meters—switchable to show either groups 1–8

aux 1–8, aux 9–16, matrix 1–8, and matrix 9–16

left, right, and mono (center)meters and stereo solo meters

dual-color LED power supply status-indicators in meterbridge

littlites can be made to flash with intercom-call

variable sine wave—frequency 20Hz–20kHz pink-noise generator

chassis is powder-coated 12-gauge aluminum with internal bracing

modules are powder-coated 18-gauge galvanized-steel with baked-epoxy screening

see dimension-drawing

five-years

frequency response

THD

noise

crosstalk

phase shift

inputs

outputs

insert

nominal output level

input channel eq

channel metering

master metering

signal generators

construction

dimensions and weights

warranty