AUSTRALIAN MONITOR OPAL 1202, OPAL 2802 Brochure

fu

Australian

Monitor

Opal

S

eries

POWERAMPLIFIERS

Australian

opals are

among

the

most

beautiful

and

sought-after iridescent

gems

in

the

world.

Of all the

known

precious

stones, only

opal can show the

complete

range

of

spectral

hues in

a

glorious

balance.

The Australian Monitor

Opal

Series

is

a

gem

among

amplifiers, the

culmination

of countless

hours of

dedicated

research

and

development.

Without

sacrificing

Australian

Monitor's legendary

quality

or

design, the

new affordable Opal Series

response

combined

with

a

high

slew

rate,

and

high

damping

factor for

accurate

loudspeaker

driver

control.

Construction

Built to the

highest

standards

the

Opal

Series

utilises a 2 unit

high, module monocoque

chassis.

Its

symmetrical

construction

features heavy

gauge

aluminium

front

and

rear

panels

integrated with

a

rigid folded

steel

pan

and steel side bracing.

brings

within

everyone's

reach

superlative sonic

performance,

unmatched

dynamics and of course our

renowned

"all

terrain"

construction techniques.

Audio Reproduction

The Australian

Monitor

design team have

drawn on

a

wealth

of experience in

sophisticated

audio circuit

designs for

CD

mastering

facilities, music recording

studios

and other

esoteric audio monitoring

situations. ln the

new

Opal Series

they have

created

one of the finest

high

definition audio signal

paths

available, exhibiting

dazzling

transients,

timbral

accuracy and outstanding

sonic

integrity.

The

MOSFET-based

circuit

design

with

double-

balanced

current-mirror

drive circuit

provides

wide

bandwith, ultra

low

THD

/ lMD,

super

fast

transient

Cooling

Fourcustom aluminium alloy

heatsinks,

providing

a6.0

metre

perimeter

with

over 500,000 square

mm of

convection cooling area.

lnternal

airflow

is

assisted by

a signal-dependent,

silent

axial

fan,

providing

"on

demand" cooling.

Power Supply

At

the

heart

of the Opal

2802

is

a

high efficiency

800VA

toroidial

mains

transformer, the current source

for

two

massive 15,000

microfarad

computer

grade

reservoir

capacitors.

While maintaining

high

power

output,

this

topology

minimises ELF

emissions

to ensure

your

safety.

Opal 1202

Output Power

Test

E.l.A. lkHz, <0.05%

THD

(pre-stress

at rated

power

for 5 min)

single

channel

driven

double

channel driven

Bridge

mode

Dlstortlon

@

0.5 dB below

clipping

re 4

ohms

THD

@ 1 kHz

IMD

SMPTE

(60

Hz / 7

kHz

4:11

IMD

CCIF

(14

kHz

/

15 kHz

1:1)

Frequency

Response

-0.35,

-0.15d8

Damping

Factor

@

1 kHz,

8 ohm load

lnput

lmpedance

Line to

Line,

Balanced

lnput

Sensitlvity

I ohms, rated

power

lnput

CMRR

@1kHz

Voltage

Galn

@lkHz

Output Rlee Tlme

2O

RHz

square

wave

1 13Vpp

(leading

edge)

Slew

Rate

20

kHz

square wave 145Vpp

(leading

edge)

SlgnaUNolse Ratlo

linear

(30

kHz)

A weighted

Crosstalk

@1kHz

Welght

Net
Packed

Dlmenrlone

excluding handles

(19

inch

EIA rack

mounting,

2

units

high)

Opal 2802

Power

Power

Eohm 4ohm

150W

220W

130W

175W

340W

<0.005%

<0.005%

<0.008o/"

20

Hz

-

20.kHz

250:1

25 kohm

(+adB)

1.23Vrms

>81.5db

31dB

102d8
104d8

<-90d8

13

kg

15

kg

HxWxD

3.5 x 19 x 14.8 inch

88

x

482

x

375

mm

Output Power

Test

E.l.A.

1kHz,

<0.05%

THD

(pre-stress

at

rated

power

for

5 min)

single

channeldriven

double channel

driven

Bridge mode

Dlstortlon

@ 0.5 dB below

clipping re 4

ohms

THD

@

1 kHz

f MD

SMPTE

(60

Hz

/7 kHz 4:1)

IMD

CCIF

(14

kHz / 15 kHz

1:1)

Frequency Response

-0.35,

-0.15d8

Damplng Factor

@

1kHz,8

ohm

load

lnput lmpedance

Line to Line, Balanced

lnput

Sensitlvity

I

ohms, rated

power

lnput

CMRR

@1kHz

Voltage

Gain

@1kHz

Output Rlee

Tlme

2.4pS

20

kHz

square

wave

113Vpp

(leading

edge)

Slew

Rate

35V/pS

20

kHz

square

wave

145Vpp

(leading

edge)

SlgnaUNoise Ratlo
linear

(30

kHz)

A weighted

Crogatalk

@1kHz

Welght

Net
Packed

Dlmenalone

excluding

handles

(19

inch

EIA

rack mounling,

2 units

hlgh)

Power

Power

Sohm

4ohm

250W

320W

200w 280w

560W

<0.005o/o

<0.005%

<0.008o/o

2O Hz

-

2OkHz

250:1

25 kohm

(+adB)

1.23Vrms

>81.sdb

32dB

2.apS

35V/pS

102d8

104d8

<-90d8

15 kg
17

kg

HxWxD

3.5

x 19 x 14.8 inch

88

x

482

x 375 mm

**w@

ffiErc

*rll.ats

ttaVlr

a L.a

t-t

Features

-

Butfered

21

position

front-panel

stepped

attenuators

-

Balanced XLR

inputs

-

Symmetrical construction

for

even weight distribution

-

1

Watt / Clipping

status indicators

-

Binding

post

outputs

-

Silent convection

cooling with fan

assist under heavy

load

Options

1.70

I

100 Volt

line

transformer

2.

HP-1

i LP-1 Filter

cards

3.

Speakon

output

connectors

j

Protection

-

lnput overvoltage

protection

-

Fault

protection

and

indication

-

lntemal fuses on

each

supply rail

-

Overload

protection

and indication

-

Short circuit

protection

and indication

-

lndependent thermal

sensing

on each

channel

with

safety

mute

AUSTRALIAN

MONITOR PTY

LTD

29

HOPE

STREET ERMINGTON,

N.S.W.2115

SYDNEY AUSTRALIA

Phone

61-2-9874

9355

Fax

61-2-9874

9366

Email

ausmon@mypostbox.@m