Australian monitor CONTRACTOR, OPAL User Manual

Australian

Monitor

PROFESSIONAL AUDIO

CONTRACTOR

and

opof

Audio

Amplifiers

POWER AMPLIFIERS

OPERATION MANUAL

IMPORTANT!

The rear

inlemationally

and

MAINS

The head triangle

uninsulated voltages

These voltages constitute This

panel

of the unit has a number

recognized symbols

precautions

connected

presence

contained within

that

of a LIGHTNING

is intended

may be of

the risk

symbol is

of an electrical

reinforced

This

information

performance,

power

with the

your

Safety

related to the hazards

should be taken when

equipment.

FLASH with

the boundaries

to alert

may

the user that

exist within

a sufficient magnitude

with the text:

the units

shock.

Please

Operation

amplifier.

contents

amplilier.

read

Manual

regarding

maintenance

You

should

of this manual

carefully.

contains

safety

and

Precautions

of markings

of a

and

operating

an arrow-

equilateral

dangerous

enclosure.

as to

The

qualified

intemal servicing

important

precautions,

operation

familiarize

before operating

and

your

of

yourself

Labelling

REFER

SERVICING

QUALIFIED PERSONNEL

user should not

and

knowledgeable

wo.kings

or

authorized modification

attempt

of the unit

to service

personnel

should

TO

ONLY

the

familiar

attempt

to the

unit. Only

with

any repair,

unit.

the

ICAUTION!

RrsK

The

within

to alert the

mainlenance

DO

The

encounterlhe entry

the unit to the above

of the unit hazardous

shock.

oF ELEcTRTcAL

Do Nor

presence

the boundaries

of an EXCLAMATION

user thal there

literature

IWARNING!

NOT EXPOSE

RAIN

unitshould not

OR MOISTURE

beoperated in

ofwater, rain,

sHocK

oPEN

of a

equilateral triangle is

is important

that accompanies

TO

EITHER

a situation

or anyfluids.

conditions may

and increase

/lt\

,/ t \

MARK

operating

the unit.

where it may

To expose

make

the operation

the

risk of electrical

contained

intended

and

NO USER

The unit service or re-use in

you

lf

are in

you

tion

please Monitor direct:

contact

SERVICEABLE

does not

require is

AUSTRALIAN

ERMINGTON.

contain

need of special

your

THE

TECHNICAL

AUSTRALIA.

Local (02)

lntemational (612)

PARTS

parts

any

this

or any other

assistance

outside

nearest

29 HOPE

the scope

service

OFFICER

I\,4ONITOR

SYDNEY. N.S.W.

Pry

ST

21 15

Phone

874 9355 (02)

874

9355

(612)

INSIDE

which

product.

and

the user

the

can

informa-

of this manual,

agent or Australian

LTD,

Fax

874 9366

874

9366

/tu

Contents

1. lntroduction

2.

Controls, Connectors

&

3. lnstallation

4. Operation

5. Bridge Mode

6. Load lmpedance

7.

Maintenance

8. Warranty

9. Specifications

Features:

-

Custom designed, heavy

-

Open modular

-

Symmetrical weight

-

Well-regulated,

-

High VA-capable

-

Binding

-

Stereo

-

lnput

-

21 Position

post

or bridged / mono operation.

signal XLR

construction,

distribution

high

current

toroidal

output connection

and tag strip connector

detented attenuators.

+

lndicators

duty alloy chassis. -

for

ease

of servicing.

power

mains

supply.

transformer.

5

q

12 14 15 16 17

18

List

Figure Figure 2. Front Panel Figure Figure Figure

-

- Plug

-

of Illustrations

1 .

Block Diagram

3. Rear Panel

'Speakon'

4.

5. Bridge Mode

1 Watt

Output clip indication Massive heafsink

Efficient front Single speed Output fault indication.

High-quality,

output indication.

in signal

throughout.

and heat-exchangers.

to back cooling.

automatic axial fans.

processors

close{olerance

Layouts

Connector WirinS

Speaker Wiring

-'l

at

dB

(optional).

components

.l

14

4

a

1

Protection

-

Suppression of inrush

-

lnput

muting

-

lnput

overvoltage

Features

cunent at mains turn-on.

at turn-on. -

protection.

-Radio-frequencyinterferencesuppression.

- Short-circuit

Australian

protection

Monitor

and indication.

-

lndependent

Layout,

have been

DC

grounding,

optimized to

supply rail fuses.

decoupling

provide

stability,reliabilityandlongevity.

and componentry

the user with

ltu

l.Introduction

Congratulations

professional

The

design

aspects

chanical,

dedicated

optimized quality,

Figure channel inputwith

amplification

ofyouraudio

of

a well designed

electrical

manufacturing processes,

to

reliability

1

shows

of the

a

buffered

on

choosing

and sonic

provide

and

a block

amplifer

attenuator

Australia n

requirements.

poweramplifierembraces

unit. The visual

parameters,

Monitorlot your

along with

have

professional

a

longevity.

diagram

comprises

PRE,AMP

AGE

ST

driving

tool

of the

amplifier.

a balanced

a differentialclass

INSERT

POINT

all

the

design,

me-

our

all been

that exhibits

Each

active

BUFFER

S

TAGE

A

drive

stage which

MOSFET

The

unit operates

power

supply.

The

Contractor,

in 19'

wide rack

These

units

their high

vide

the

critical

ers, at high

DRIVER

AGE

ST

output

Opal

have been

power

degree

duty

in

turn

stage

configured

from

a high

pA

and

mountable

specifically

output with

ofcontrol

cycles for

OUTPUT

STAGE

,I

drives

a fan-cooled,

as

a source

current-capable

Series

are

2 units

cases.

designed

minimal

exlended periods.

distortion,

required

by

class

follower.

tall

to deliver

and

your

OUTPUT

AB,

linear

(3.5"),

pro_

speak-

CHA

o/P

CHB

O/P

Figure

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1 Amplifier

Block

Diagram

2.

Controls,

Connectors

Models and Variants

Indicators

&

While these amplifiers are designed to

applications, all variants use the same

output

powers

= = = =

2x 2x

2x 2 x

are:

175W

300w

400w

600w

The

Contrac'tor Series :

C300 C600

C800

C1200

electronics.

4 4 ohms

fu,Austanan

Contractor Series

suit different

ohms

Monitor

Opal Series :

1202

Opal

Opal 2802

PA Series:

PA-3 PA-6

PA-8

PA-12=

= = =

c600

= =

-o,g

ol:lr

2x 2x

2x

2x 2x 2x

'175W

300W 4 ohms

175W

300W 4 400W 4

4

ohms

4 ohms

ohms ohms

600W 4 ohms

\-:-:

N

Opal Series

Aushalian

Monitor

OD

Figure

2 Front Panel

Layouts

/tu

6

Controls

& Connectors

Front

Figure numbers

the

l.

This

exists.

The

between

A

rail

programme. peaks less.

The

Panel

2 shows

refer

controls

Faultlndicator

amber

fault

short

on the

fuse

the LED

forgross

circuit has

lt will

provide

1.

does not

2.

lt will

shorted

2.

Attenuator

Level

control for

position reduction mum

detented

gain,

3. Power

Press

the

the switch

(turn-on) for

the input

approximately

layouts

lo

areas

and indicalors

of

on the drawing.

LED will

detection

drive

This

affect

indicate

output).

in

decibels

no

circuit monitors

and output

speaker

will flash

LED

overloads;

two

stages

indication

the input

and mute

your

potentiometer

from

attenuation).

Switch

switch

to the

to the right

left for

to

the amplifier

two

the front

are as

panels;

follows:

flash when

your

of

output or

brightly

willalso flash

if

or

the load

of operation:

gross

(e.g

signal_

the input

amplifier

seconds.

is

and indicates gain

'0

the

dB'

for

power

The

a fault

the

amplifier.

a blown

in sync

programme

with

is 2

overload)

provided

position

power

OFF.

is

muted by

the

section

functions

condition

difference

negative

with

the

ohms

but

ON.

by a

(maxi-

press

(e.g

21

signal

At start-up

30dB

or

of

fans

will

continue

had a

cooFdown

matically input

5.

Status Indicator

This is

of

the

operation.

The

exceeds 2.828

4

ohms).

The

the

er's output

providing

muting.

a dual

output

These

Below 1 watt

1 watt

and

1dB

below

LED will

-1dB point

stage.

with reference

alter

with

changes in

the load,

The attack

and duty

and

circuitarethoseof

lf

using this

steady watt level ohms,

The

amplilier

ping,

your

of

indicator

tone

is

the

(or

2 wafts for

butyourspeakers

speakers,

to period

colour

stage

levels

above

actual

turn

volts

change

before

The

to the

cycle

delay

Peak

a

(e.g

slate

point

is not

try

run

and

the

inrush

LED

and

cunent

which

displays

are:

ctipping

green

once

(1

watt

to red

once

actual

threshold

amplifier

the

mains

fluctuations.

time

Programme

to line

on a mixing

when

indicator

4 ohm

damaged

may

to keep

once

the

unit

will restart,

suppression

displays

three

(unlit)

(green) (red)

the

output voltage

re

8 ohms,

the

output

clipping

(ballistics)

up

sensitivities,

loads).

by

be.

clipping

of the

supply rails

supply,

Meter(p.p.M.)

console).

comes

running

To maximisethe

infrequent.

amplifier has

auto-

and

the

status

tevels

or 2

watts re

exceeds

amplifi-

-1dB

point

and

will

changes

of

the status

apply a

The

on, re

into

clip-

life

of

is

in

1

g

4.

On/Thermal

This

is

green

receiving

ln the

advent

red

indicating

ture

of the

operation

/tu

Indicator

a dual

and indicates

colored

mains

of a thermal

that the

amplifier

and

that the

power.

LED which

that

the amplifier

overload

internal

has

exceeded

amplifier

will normally

this LED will

operating

a safe level

has

shut down. The

is

on and

tum

tempera-

be

of

Rear Panel

Controls

& Connectors

7

Figure

numberc refer to areas on the drawing. the controls

3 shows

and

layouts

indicators

of the rear

are as follows:

panels;

6. Balanced Input

A female

Pin 1=Signal

Pin Pin

6b Level

(Contractor

A rear

potentiometer

for

6c Barrier

A three terminal

3

2 = Cold

3

Hot

=

Control

panel

input

level

XLR connector is

Ground

(inverting

(non-inverting

version

mounted

provided

is

control on

Strip

Input

barrier strip connector is

for'hard wiring'signal input

tions. This input

7.

Signal

(C800 When ground

It is

to

different

ment

up on the input interrupt connector).

Ground Lift

& C1200 only)

this

switch

from

intended to

ground potentials

the

and

signal

The amplifier should be

before engaging

Hum Problemsintormation

of this manual-

parallel

is

engaged

the input

amplifier), or stray magnetic field

connectors on both channels.

be used to

ground/shield

ground

this switch! Please read

provided

or reverse

phase)

in

or

only)

position

21

on all Contractor models

each

channel.

in

with the input

Switch

it

disconnects

isolate

between

wiring. (lt

continuity on the

in the Operatlon

the

The functions

on each input:

phase)

detented

provided

permanent

XLR.

earth loops

source

does not

strapping

turned off

section

situa-

signal

(due

equip-

pick

the

section

Mains

9.

of

Your

(power

ply

fier. The

accordance with

Your Note: 110V version

mains Iead.

10. Mains Fuses

M

fiers. Fuses need and the value must

I l.

Pushing

mode

only accept signal applied

and the level channel A's

will automatically

versed

sourced

rcad lhe Bridge Mode

Lead

amplifier is

cord) appropriately

voltage

wires

BROWN BLUE

GREEN&YELLOW

unit must always

fast

205

Connector

supplied with

marked

in the mains

the following

= =

blow

type fuses are

to be replaced

I.E.C.

a IEC mains lead

rated

for the mains

on the rear

ACTIVE

NEUTRAL

are

be as follows:

panel

lead are coloured in

code:

EARTH

=

be earthed!

supplied with heavy

used in these ampli-

with the

C300/Opal1202lPA3

C600/Opal2802/PAO

c800

c1200tPA8tPA12

Bridge

Switch

this switch in

of operation. ln this mode

of both channels will be

attenuator. The

phase)

from

the red

engages the BRIDGED/MONO

to channel A's input XLRs

output

be of the opposite

and speaker

binding-post outputs. Please

termination should be

section of this manual.

of

34 64

7A

10A

your

amplilier will

controlled by

from

polarity

sup-

your

ampli-

duty

same type

channel B

(re-

Binding

8.

Binding speaker

spade

as

positive

Post

posts

(banana

output termination

type lugs or bare wire. The red

and the black

Australian Monitor

Outputs

jacks)

post

provided

are

post

plugs,

is used

with

banana

is used as negative.

for

CHA CHB

+VE

-

VE

Phase Phase

/tu