Page 1

Australian
Monitor
PROFESSIONAL AUDIO
CONTRACTOR
and
opof
Audio
Amplifiers
POWER AMPLIFIERS
OPERATION MANUAL
Page 2

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
Page 3

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
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
Page 4

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
/tu
1 Amplifier
Block
Diagram
Page 5

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
4
4 ohms
fu,Austanan
Contractor Series
suit different
ohms
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
Page 6

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
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
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
Page 7

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
pin
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
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
Page 8

8
Controls & Connectors
&
.d*I
Opal & PA Series
.Outp!t
,ffi
\BS
/tlt--__lt\
/. tlt t.\
\ | 0 0 lt /
\tL\rill
-ffi
10 m lQlQl
io lU lUlUl ol l//z=.\\ I
ourour
:a A/l<_\
'-'
r.rd
ol
a4lt-l
.
-///l
l\tt
"
| ;:-t// t*c-h i
o
E-F*-r
o
Figure
/tu
Rear Panel
3
Layouts
Page 9

3. Installation
Mains Lead Wiring
WARNING
Your
amplifier must be
you
When
mains
plug
ate
current
your
The
with the
plug
is used. It
(ampere)
local
energy
wires in
following
first receive
attached. You
requirements,
authority.
the mains lead
code:
GREEN&YELLOW=EARTH
Connect to the
with the EARTH
BLUE = NEUTRAL
Conneci
(or
or coloured
BROWN
Connect to the terminal
(or
or coloured
Power
Ensure that
panel
rear
consumption is
110-120 Volt
to the terminal
colored WHITE
BLACK in the
ACTIVE
=
colored BLACK
RED in
Requirements
your
mains supply voltage
mains voltage
as follows:
Models
C300/Opal1202lPA3
C600/Opal2802/PA6
c800/PA8
c1200tPA12
earthed at all
your
amplifier it
must ensure
must correspond
are coloured
terminal marked with
SYMBOL,
marked with
in USA
(LIVE)
marked with
in USA
the United Kingdom).
marker. Each model's
Amps Watts
15 100
15
?0 160 2200
timesl
may not have
that
an appropri-
with the
and meet
the approval
in accordance
the letter
or coloured
the letter N,
and Canada,
United Kingdom).
the letterA
and Canada,
is the
same as the
at idle
6
50 450
120 1400
amplifier's
GREEN.
or L.
power
Watts
power
full
1000
E.
Mounting
Your
amplifier is designed
ing,
and occupies
centers
a
Vertical:
Horizontal: 18.2'to
of
The
slots in the mounting
up to 1/4"
We recommend
the amolifier,
amplifier's weight
provided
be
panel
2 EIA rack units
are:
3.0'(76.2mm)
(6.35mm).
that
especially if road
can bend
by secure
support brackets.
for
standard 19'rack
(3.5").
(461.2mm
18.6"
flange will
you provide
some racks. This
shelving, support rails,
to 473.8mm).
accept
additional
use is
planned,
mount-
The
mounting
boll diameters
support for
as
the
support
can
or rear
Cooling
Allamplifiers
airfrom the front of
the side
the heated
offer speed control fans
output level s
while the heatsink
speed fans which
full
to
exceeds
An unrestricted
provided.
build up within the unit
at
thermal shutdown mode.
are cooied
the unit and
the
of
unit. The
from
air
above 2 watts into 4
normally run
speed when
(128"F).
60oC
airflow into and
Any restriction
by an axialfan which
expels the heated
C800 & C'1200
rear
lhe
is hot. The
of the unit.
which
are turned
C800
at half
the internai
out from the unit must
of the air flow will cause heat
possibly
and
amplifiers expei
ohms.
& C1200 offer two
speed, and switch
heatsink
force
draws
airfrom
Standard
when
on
and stay on
temperature
the unit
units
into
cool
the
be
to
its
220-240
Volt Models
C300/Opal1202/PA3
C600/Opal2802/PA6
c800/PA8
c1200tPA12
Australian
Monitor
Amps
3
6
7
10
Watts
idle
at
Watts
full
50
100 1000
120
160
at
power
450
1400
2200
/tu
Page 10

I
I
10
Installation
Input Wiring
NOTE. lnput
safety
The input
requires allthree
twin-core shielded cable should be
ground (earth).
to
signal
your
ground
amplifier is a balanced 3-pin system and
pins
to be connected.
is not to bo used as a
Only high
used.
quality
OutputWiring
wiring
When
gauge
speaker
reduced
mend using a heavy duty two core flex
amping),
equivalent) as a
wire
lead the
power
10 to 12
your
to
your
speakers always use the largest
connector will accept. The longer
greater
and less damping
gauge (2mm'?to
minimum.
the losses
at the load.
2.smm'?or 50/0.25 or
the
will be, resulting in
We recom-
(four
core
flex if
bi-
XLR Inputs
as
going
follows:
When wiring for a balanced source the connector
to
inputs of
the
Pin 3 = HOT
your
amplifier should be
(non inverting)
wired
Pin2=COLD(inverting)
Pin
1=Ground/Shield
(input
1
when wiring
you
ground),
must
When wiring from an unbalanced source
pin
ensure that
by linking the
either
source equipment output
for
an unbalanced source:
Pin 3 = Hot
Pin
2 = Connect
Pin 1
Barrier
Ground/Shield
=
Strip
is
2
phase
(in
Inputs
connected
pins
in the
wiring.
with the amplifier's output)
pin
to
1
The barrier strip connector on
models is wired in
connector as follows:
=
+ve
Pin 3
parallel
(non-inverting)
pin
to
input
connector or at the
Therefore
(Ground/Shield)
the
Contraclor Series
with the female XLR input
Pin2=-ve(inverting)
Pin
1
=
GND
(input
NoTE. Some in-line XLR connectors have a termination
lug
that connects
Do not link this lug to
defeat the amplifier's
This lug is often referred to as a'drain'and is used
provide
shielding
signal
tion, eg
induced into
a circuit to the chassis
purposes.
grounds
to help in reducing
directly to the chassis
pin
input
This is usefulwhen further isolation of
is
required between source and destina-
grounds
signal
ground)
signal
ofthe
1
at the amplifier's inpui as
grounding
earth
from
scheme.
(not
signal
loop noise, or noise
magnetic fields.
stray
connector.
it will
ground)
Binding Post
When terminating to the
output connectors, banana
be used. The
terminal is negative.
lf running in
used. Channel A
and channel
'Speakon'
(C800
&
When
using the
for speaker output, use only the mating NEUTRIK NL4FC
in-line
connector.
channels can be fed from a single connector.
'Speakon'
Two
amplifier.
channel
Wiring Diagrams).
the channel B output.
ing
outputs
connectors-
to
for
C 1200 only)
The
A & channel B outputs
Outputs
red
BRIDGE
provides
provides
B
4
mm
binding
plugs
terminal
mode,
is
only
positive
the
the negative output to the load.
post (banana
or spade type lugs can
positive
the red
and the
binding
output to the
posts
Outputs
NEUTRIK
This connector is
connectors are
channel
The
separately or together through a single or
'Speakon'
'Speakon'
A
channel
gives you
This
(NL4MP)
designed so that both
provided
actually carries both
(see
figure
'Speakon'
B
options of connect-
connector
on the other
4:
Speaker
carries only
jack)
black
are
load
two
/tu
Page 11

Installation 11
A/LFFT
C8
OR
cH 8/FlrcsT
SPE AK ON
SINGLE@NNECTION
DUAL CONIGCNON
CH
A/L
CHA
SPEAKON
BRIDGEDCO
NECTION
Australian
Monitor
Figure
4 Neutik'Speakon'
Connector wiring
/tu
Page 12

t2
4.
Operation
IMPORTANT
All
signal source equipment should
This
not only
well.
Faults
ment
properlyearihed.
(ungrounded) piece
path
to
input. lf
input to
which may be
ensures
can and do occur
where the chassis can become
ground
fault
the
yourampliferand
Before making
ssrve the following:
1. Ensure
lhe rear
2.
Ensure that all system
the mains
panel
to a common
equipment
separated
3.
Check the continuity of all interconnecting leads
amplilleq
conductors.
4.
Ensure that the
can adequately
plifier.
from
by
ensure thatthere are
Before operating
-
the
attenuators
wise).
-
power
the
-
the
the
-
the BRIDGE
ning
switch
GROUNO LIFT
'out' position).
Switch is not
the amplifier in
Powering
REMEMBER
The
amplilier
you
tum
turn OFF.
We recommend
down when
should be the last
ON, and the first
fuming the unit
your
ln
which could
cunent
ingtances the
lhese
of equipmentwill
is large
lookforthe
you!
any connections
voltage supply matches the label
your
of
point.
large
are at the OFF
amplifier.
grounds (earlhs)
Avoid
multiple
distances.
power
handling of
with
cope
your
amplifier, ensure lhat:
is
OFF.
Switch
bridged
Up
turning
the attenuators on
be adequately earlhed.
safety but
possibly
powering
power
the
is not
engaged unless
piece
on.
everybody else's
in mains
enough
mode.
connected
fault in a
look
be
itwill destroy
next available
your
to
several
sources that may
no
open orshort circuited
your
power
output of the
position (fully
engaged
piece
of
of equipment that
'live' if it is not
forthe
your
are connected
load
equipment
your
equip-
'floating'
shortest
amplifier's
amplifier
pieces
to
(speakers)
anticlock-
(should
you
are run-
amplilier
the
paih,
ob-
your
am-
be in
that
you
The
ICS
circuit also operates
as
seconds
signal
When
seconds before
the ICS
this mute willrelease,
pass
to
switching the amplifier
circuit to reset.
Level Matching
The normal
position
the amplifier
back
on
amount
NOTE.
of
lf full
be
amplifier with the front
position,
(tully
(anticlockwise)
marked
power
otherwise clipping
some resultant
power
is
achieved.
Sensitivity
Your
amplifier is a linear device
inpulto-output
age
swing is determined
the load, load
signal.
The voltage
c300
c600
c800
C12OO lPA12 45.25 x
Opal
Opal2802 29.0 x
The
attenuator is
clockwise) is nominally:
+4.0d8
+2.6d8
PA3
PA6
PA8 37.0
'12O2
input
(1.23
(1.04
30dB
a
unattenuated.
inputmute.
allowing
OFF wait
switching the unit
position
clockwise, no attenuation).
operates al full
output is required
for lhe
reduces
the
on
attenuator scale.
panel
on again. This
'
attenuator
gain.
Tuming
the input
you
should
attenuator
of the input
distortion
voltage
type, and the duty
gain
facior
will
occur
operating with a fixed
gain.
The maximum
by: the applied mains voltage,
cycle of the applied
your
of
19.9 x
29.0 x
x
amplifier is:
(or
(or
(or
(or33.11d8)
19.9
x
(or
(ot
sensitivity for
at the
volts) for raled
volts) for
'0
your
amplifier when the
dB' attenuation
power
into an
power
rated
into a 4 ohm load.
After two
any applied input
a couple of
allows
is the
ln
the attenuator
sensitivity by the
above the
before full output
25dB)
27dB)
31.36d8)
25dB)
27dB)
position (fully
'0
posilion
this
operate
circuitry and
output
I ohm
your
-15d8
volt-
load.
dB'
you power
When
establishment
lnrush
Cunent
the tirsl
prevent
high starl-up
0.5 seconds. This limits
'nuisance-tripping'
/tu
up,
period
Supression
cunents.
your
amplifier
before it will
(lCS)
goes
through an
accept signal. The
circuit is in operation for
the mains cunent to
of circuit breakers caused by
Each
channel of
your
impedanceof25k Ohms
signal
load
for any signal source.
source (i.e.
output impedance
an
a difficult
The
fier) should have
amplilier has a balanced input
(25,000)
the equipment feeding the ampli-
and should
notpresent
Ohms
of 2k
Page 13

Operation
l3
(2,000)
the
lnput
See the
lower
or
cabling.
overload
specification
tion.
Hum
Mctstequipment
under
ment
ment
The
plague
Problems
ideal
conditions.
and to
safety earth
problems
'E's
three
your
audio system
a) Electrostatic
b)
Electromagnetic
c) Earth loops
Electrostatic
elements
affects higher
The
mains lead
reduced
ing
ductor
causing
source is
or
by moving
additional
which
impedance paths,
generally
a speaker
electrostatic
forms
Electromagnetic
into
system
paths.
mains
It
is
interference,
viding
Earth loops
pieces
earth.
This
is
occurs
plugged
where
cunent
due to
between the
appears
amplified
elements
Radio
transmitlers
transformers
generally
but
a magnetic
can
of equipment
far
by
when
source equipment
into
ditferent
the safety
flowing
lhe wire's resistance.
ampllier
to the amplifier's
as hum.
to
avoid unwanted
occurs
is
designed for minimum
will
of hum
+20.5d8u
at
section for more
When
connected
in an electrically
often
occur.
and hum related
are:
radiation,
radiation
radiation,
capacitively
and
an interference
such
a nearby
lead. The
the
offending lead
a banier to
radiation
that mainly
shielding
high
problem
the field).
induces
effect
or stray
are
often the cause
more
difiicult to
again,
moving the
(i.e.
shield
arise from the interfacing
and their
the most
common
eliminate
a steel
connections
cause
and
points
along
earth wiring
through
the wire
has
produces
This voltage
earth and source
input
as
an input
highfrequency
(8.25
volts).
detailed
hum
when
to other
noisy
noise which
couples
voltage
as amplifier
voltage
away, or
(i.e.
interference
magnetic
an
low
of
can
this
earthed
to
that
such as
usuallybe
by
cunents
impedance
tields
problem.
this
source
shield)
away
should hetp.
ofthe
to
of hum,
the
amplifier
the
safety
earth and
a cunent
in it. The
a voltage
ditference
equipment
signal
loss
informa-
used
equip-
environ-
can
system
mainly
inputs.
provid-
con-
from
kind
of
pro-
or
various
safety
and it
are
drop
earth
and is
in
There
problems:
1 .
2. Ensure
3. Ensure
Signal
(c800
When
may
be due
The
Lift'switch
from
related
a
Always
are
should
a balanced
outputs,
anced
NOTE
lf
the input
adequate
equipmentdoes
disconnect
connect it
input. This
actually
earth-
are thr'ee
Ensure
your
things you
power
niains
i.e, without'equipment
refrigeration
earth
ground
mon
possibility
equipmentto
or lighting
circuit.
all
equipment
of circulating
or safety
the
same
that balanced
fier
are
connected
to
Gound-Lifr
& Ci200
proper
still have
to any
Contraclor
the
amplifier.
noise
ensure
down when you
only be
lhese
outputs.
goes
onty)
system
some
of the
Series
which
may result
thatyour
used when
signal
are often
ground
shielding
not
your
shield
to the
will
ensure
to the
hook-up
hum
previously
disconnects
A substantial
engage
source.
lift
switch is
of the input
provide
from input
'drain'
amplifierchassis
can
for
the audio
on il
which
within
lhe
point.
earth
eartl
ground
signal
earth
at
Switch
has
or hum
amplifiers
by
use
amplifieris
this
the amplifier
Be wary
no
more
wiring.
adequate
conlact
the shield
do to avoid
system is
such as
wilt
air-conditioning,
generate
system
shares a
This will reduce
cunents,
potential.
leads
one end
been
related
by referencing
going
only.
carried out,
noise.
mentioned
a
offand
,signal
ground
hum
the attenuators
have
lhe input
drop in
of this switch.
switch.
is
operated from
quasi-balanced
of
than floating
you
used,
lf
the signal
shielding
connector
going
to
the amplitier,s
your
on
and
subsequenflyto
earth loop
.quiet'
noise in thl
to
the ampli-
This may
gremlins.
Ground
wiring
and or hum
This switch
unbal-
must
ensure
source
you
musl
pin
1
and re-
input
wiring
com-
the
you
Ausbalian
Monitor
/tu
Page 14

14
Bridge
5.
term BRIDGE
The
fierchannels
in series
channels.
Channel
outsut
phase
with the
Using
180'provides
powerinto
(a
A
is in
reversed
input signal.
amplifiers
two
the
output-
A common
70 and
used
use of
100
in bridge
requirements
deliver
the
Mode
is used
to
used
are
bridge)
is used
listed
between
lhe'dominant'
as
phase with the
output
its
so
his way
a doubling
ouputis
The
load.
amplifierin
an
distribution
volt
provide
to
mode
for a sPecific
voltage
when two
drive lhe
ouhuts of
is exactly'180'out
ofthe
lines or
independent
same load.
input signal;
phase
with a
voltage and foultimes
nowan
mode
bridge
the amplilier
lhe conect
load. Each
load of I ohms.
into a
The
the two
channel
amPlifier
channel
ofphase
difference
balanced
active
is for driving
voltage/power
amplifier
ampli-
load is
and
B
can
its
is
of
the
be
can
shown
As
your
up
amplifier
Whilst the
1. Connect
put
XLR.
control
for both channels.
2. Engage
amplifier.
Connect
3.
terminals,
to the channel
goes
load
connections
in the diagram
running in
for
amplitier
the signal
The channel
the
your
i.e. the
to the
is OFF:
source lo the
'push
to
load between
positive
A output and
channel B output.
required.
BRIDGE
the red
of the
side
the
three steps
channel
negative side
there are
A attenuator
bridge' switch
in setting
mode.
A female
becomes
on the
binding
load is connected
There are
the level
rear of the
Posl
no further
in-
output
ol the
PA3 / OPAL
/
c300
/ PA6
c600
c800 /
c1200
PA8
I
c=:=-)
(-_-----''-
c-:--)
c_::_=-
C ::)
/ OPAL
PA12
1202
2802
35V
70v
80v
100v
-F:+-
-
A.t?/.\ldHHtrh
e
\2lql44F#F,',,HN
FROM SIGNAL SOUBCE
A
@r
Figure 5
/tu
Bridge
Mode
Speaker
Connection
(All
Models)
Page 15

Load
6.
NOTE
Ensure adequate
indicators
ing
two ohm loads.
The load
very
complex and
tive, capacitive,
the
complex interaction
from loudspeaker
amplifier
Loudspeakers
nal impedance.
only to
As
an example,
of say I
at resonance,
nance
guard
to
that a loudspeaker
does not really
operatingwithin
This nominal impedance
the actual
a
ohms, may have
drop to less
peak
and
frequencies.
A
6 ohm load makes
ohm load
at the
same voltage,
Though various
nal impedance,
(with
apologies
some loads
to G.B.
As well as this
waveforms
than the
bench tests.
The
found in
'steady-state'
power
output of
cation sheet is
resistive
Though
that exist, it
swing
rating
(Ampere)
amplifier's
load for
this method
only
(before
power
clipping) for a
does not
capability of
ability to sustain high
Impedance
ventilation
against thermal
at different frequencies
resistive
to loudspeaker,
characteristics
loudspeakerwith
then increase to
an amplifier
loudspeakers
Shaw).
burden
actual use can
sinewaves
your
derived from voltage
a
sine
in
is
gives
an
give
the amplifier, nor
and monitor
shutdown
presents
or a combination
of these
exjst.
an
attributes,
a definilive
an enclosure
of the speaker.
a nominal
impedance
than 6 ohms
over 16
work
it
as
requires
may
have
are more'equal'than
on the amplifier,
demand
used in
at
given
quoted
a
the various
of
load.
amplifier
wave
line with
indication
an indication
energy waveforms.
the
FAULT
when
to an
amplifier is
can be induc-
of these.
which
load for
carrya
nomi-
is a rough
impedance
of over
'harder'
50 ohms
after
the reso-
ohms for higher
than
more
current.
an equal nomi-
others
the
transient
more current
most
amplifier
on
the specifi-
excursion into
given
frequency.
standards
maximum
This
does it
method
of the
voltage
current
show the
driv-
With
alter
an
guide
an 8
of
Your
amplifier
twice the
sheet
waveforms.
This
extra current
ing
and is
loudspeaker
loudspeaker
Your
amplifier is
BRIDGE
that when
the currents
will
cause
higher
The
front
an indication
operator
stage.
lf the
Fault
or do nol illuminate
can
be considered
lf
the Fault LED indicalor
'clip'LED
and/or
For
the more
tion
of the Fault
interpreted
continuously past
output stage,
a
down.
is designed
curent
to cope
impedance
diificult.
with
the headroom
and
load
jnto
mode
driving 2
running
greater
panel
fault indicators
of the 'difficulty'
indication
an
indicators
LED
then the load
complex
as the output
fuse
than that
difficult loads
reserve
the amptifier
deal with
that
is dissipated
able to
drive 2 ohm
4
ohms. The
ohm loads
in the
heat
build up within
loads
will.
of the heat
until well into
as normal
starts to flash
should be considered
and/or
LED
on
point
this
blowing
to
be able to
shown
on the
and/or high
is the result
utilizes
the'reactive
within
operator
or bridged 4
output stage
can be
of the load
build up in
flash with
the Status
clipping
or easy.
difficult loads,
programme
level limit.
could result in
premature
or
deliver
of
more than
specification
over-engineer-
to controlthe
energy'from
the ampliller.
loads
or operate
must be aware
ohm loads
are very large
the amplifier
used to
and will
the output
'clip'
then the load
before
the Status
the illumina-
peaks
should
Driving
the output
muting
thermal shut-
energy
the
that
and
than
provide
give
the
LED,
complex
be
of the
I5
in
Australi,an Monitor
/tu
Page 16

t6
7. Maintenance
Your amplifler will
nal
adjustments
optimum
To
maintenance
or so.
performance.
provide years of unhindered
need minimal
need
inspection
to be made
Fuses
WARNING
sure the unit
Make
capacitors time
positive
The
loading to apply
carlridge.
area of
environments.
help renew the contact
You
should
and
The surface
the fuse can
replace the
discoloured.
is OFF and
to discharge
negative
force to
be subject to oxidization
Removing
maintenance.
to the unit to maintain
operation
be carried out
every 12 months
give
before
fuse holders use spring
rail
the contact
around
and re-installing
surface.
fuse if the element is sagging
removing fuses'
faces of the 3AG fuse
the mechanical contact
No inter-
we
suggest
the main filter
in some
the fuse will
'1
l
a
or
When
checking
inspection alone.
continuity.
failed fuse, do not
for a
You should use an ohmmeter
Fans
to the openness ofthe air
Due
very little dust should settle
has been designed
that do settle
cles
hinder the cooling of the unit.
Over time, dust
fan blades and
for this to
taken
and the amount
so that any
within the amplifier
may build up on
reduce their cooling
happen will depend on the environment
of use.
rely
path
through
within the amplifier.
dust and/or
your
foreign
will not unduly
the leading edge
efflciency. The
visual
on
to check
amplifier,
The
unit
parti-
of the
time
/tu
Page 17

8. Wananty
,'7
Australian
Sydney,
purchaser
ised
defecls in
ranty
Australian
unil
comes
service
parts
This
conlacts,
or defects
misuse,
age,
alteration
unauthorised personnel.
It is
maintenance
vals
as recommended
manual.
Monitor
N.S.W.
of each
Australian
period
Monitor
material
from
Monitorwill,
or component
defective
during
labour
or
warranty
or malfunctions
the
to
does
thermal
or malfunctions
abuse,
connection
the
owner's
Australian
operation
without prior
inspections
Pty
15
21
amplifier
and workmanship
the
original date
covered
period
the original
not
problems
to faulty
responsibility
in
l/onitor
Ltd,
oi 29
Hope
Australia,
dealer)
at its option,
ofthis warranty,
cover blown
wanants
(purchased
that it will
of
repair
by
this wananty
under
owner.
due
to
obstructed
resulting
with
the incorrect
equipment,
factory
the maintenance
approval
to
are canied
reserves
ensure
out
St,
Ermington,
the
from
an
be free
for
the whole
purchase.
replace
or
which
normal
at no
charge
fuses,
faulty
from
accidents,
modification
or
service
that
at regular
section
the
right
original
author-
from
war-
any
be_
use
and
for
fuse
airflow,
AC
volt-
by
normal
inter-
of this
to refuse
or
warranty
care in
service
use and
To validate
complete
tralian
Monitor
purchase.
of
To
obtain
shipped
Australian
expense.
Units
for waffanty
orforgery
Australian
tial
use
Australian
and
to
to
with
damages,
or misuse
specifications
previous
where
maintenance
this
wananty,
and mail
warranty
an aulhorised
Monitor
a defaced
of
Monitoraccepts
Monitor
purchasers.
the
at the
at the
service.
purchase
whether
of its
reserves
at
wananty
above
service,
serial number
Any
receipt
direct
products.
any
the
ownerfails
of the
the
original purchaser
registration
address
the
Australian
above
address,
evidence
will
no liabiliV
or indirect,
the right
time without
to take
amplifier.
within
equipment
Monitor
will not
of
alteration,
also void
for
any consequen-
arising from
to
alter its
notice
reasonable
must
card
to Aus-
fourteen
days
should
dealer
or
at the
owner,s
be
accepted
erasure
this warranty.
designs
or obligation
be
to
the
Australiian
Monitor
plaat.
compl.L
lh.
,[odocl.
O?El Wa.r.ntt
COPAIIV
aDn=13
aTA?E
_ cttoE
Ensure that
Use this
copy
fu
WARRANTY
lhl.
Tht.
you
c.rd
c.rd t.
ta
.lLcfiv.
fill
out and
to record
nsvanmMonibr
REGISTRATION
IMPORTANT
and .dum
to ba
_ oor TnY
a duplicate
lt lmrn.dh.ly
a.nt D|RECTLY
O'ILY
upon r.c.lpt
aEnnl. xc
o rE
your
send
wananty
of the detaits.
to /lu.tr.ll.n
Rncrla!@
alLr unpsthg
Xolttto..
ol thta
c..al.
registration
card.
/tu
Page 18

l8
Specifications
9.
Model:
Output
F.T.C.20
(pre-stress
for t hr &
both
E.l.A.
(pre-stress at
single
both channels
Pulsed
10% duty
10% duty
Bridge
2 Ohm
single
both channels
Distortion
@
THD
IMD
IMD CCIF
Frequency
-0.5/ -0.15 dB:
-3dB:
Output
@1kHz
Damping
@
Power
Hz
4dB below
rated
channels
1 kHz,
channel
1 kHz. at
@
cycle,
cycle,
mode
Capability
channel
0.5 dB
below
1
kHz
@
SMPTE
Impedance
1 kHz, I ohm
C800
-
kHz
2Q
power
driven
<0.05%
power for 5
rated
driven
driven
single
both
driven
driven
cliPping
(60
Hz
(14
kHzl
Response
Factor
load
0.1%
@
rated
for 5
THD
onset
channel
channels
re 4 ohms
/ 7 kHz
15 kHz
-lHD
Power
min)
min)
ol clipping
driven
driven
4:'1)
1:1)
Power
ohm
I
Power
4 ohm
260w 400w
300w
280W
860W
510W
500w
480w
430W
630W
600W
1020W
<0.005%
<0.015%
<0.008%
20Hz-20kHz
5Hz-95kHz
milliohm
15
(typical)
500
Input
Line to Line.
Input
At
At
Input
Impedance
Sensitivity
rated output
rated output
CMRR
@1kHz
Voltage
Gain
@1kHz
Output
20
(leading
SIew
20
(leading edge)
Signal
linear
A weighted
Rise
kHz square
edge)
Rate
kHz square
/ Noise
(30
kHz)
Crosstalk
@1kHz
Weight
net
packed
Dimensions
inch
handles
handles
EIA
excluding
including
(19
Balanced
8 ohms
into
into 4 ohms
Time
127VPP
wave
127YPP
wave
ratio
mounting,
rack
2
units
25 kohm
(+3.8dBu)
1.2V
(+2
1
0v
>80
31 dB
(=
2.4 t\S
42VlPtS
100 dB
104 dB
<
37.51b
42.161b
HxWxD
19
x
3.5
482
x
88
3.5 x 19
88 x 482
high)
3dBu)
dB
x)
37
-90 dB
x 14.8
x 375
x 17.9
455
x
17 kg
/
l20kg
inch
mm
inch
mm
/tu
Page 19

Specifications
19
Model:
Output
F.T.C.
(pre-stress
for t
hr & rated
both
channels
E.l.A. 1
(pre-shess
single
channel
both
channels
Pulsed
1070
duty
10%
duty
Bridge
2
Ohm
single
channel
both
channels
C1200
Power
20 Hz -
mode
Capability
20
4dB
driven
<0.0570
kHz.
at rated power
driven
driven
1 kHz,
@
cycle,
cycle,
driven
driven
kHz
below rated
power
at
onset
single
both
Distortion
0.5
dB
below
kHz
(14
Response
dB:
clipping
Hz
/ 7 kHz
kHz
I
@
THD
IMD
IMD
I
@
SMPTE (60
CCIF
Frequency
-0.15
-0.5/
-3dB:
Output Impedance
@1kHz
Damping
1 kHz,8
@
Factor
ohm
load
0.1% THD
@
power
for
S min)
THD
for
of clipping
channel
channels
re 4
ohms
4:1)
'15
kHz
S min)
driven
driven
1:1)
Power
8
ohm
430W
400w
1200w
800w
700w
<0.005%
<0.015%
<0.008%
20Hz-29kHz
5Hz-95kHz
15
milliohm
(typical)
500
Power
4
ohm
700w
605W
930W
900w
1400w
(typical)
Input
Line
Input
At rated
At rated
Input
@'l
Voltage
@
Output
20 kHz
(leading
Impedance
to Line.
Sensitivity
output
output
CMRR
kHz
'r
kHz
Rise
square
edge)
Gain
Slew Rate
20
kHz
square
(leading
Signal
linear (30
A weighted
edge)
/
Noise
kHz)
Crosstalk
1 kHz
@
Weight
net
packed
Dimensions
excluding
including
(19
inch
handles
handles
EIA rack
Ealanced
into
8
into 4
Time
wave
wave
ratio
mounting,
ohms
ohms
145vpp
145vpp
2 units
25 kohm
1
.23V
'1.1V
>80
33 dB
(=
2.4
50V/pS
100
105
<
42
47.5
HxWxD
3.5
x 19 x'14.8
88 x 482 x
'19
3.5 x
88 x 482
high)
x 17.9
(+4dBu)
(+3dBu)
dB
45
x)
pS
dB
dB
-90
dB
lb/19k9
tb
I 2,t
375 mm
455
x
kg
inch
inch
mm
Ausbda
Monitor
/tu
Page 20

20
Specifications
Model: PA-8
Output
E.l.A. 1 kHz,
(pre-stress
Pulsed
10%
10%
Bridge mode
2 Ohm
single
both channels
Power
at
1
@
duty cycle, single
duty cycle,
capability
channel driven
Distortion
0.5 dB
@
THD
IMD
IMD
below clipping re 4
1 kHz
@
SMPTE
CCIF
<0.05%
rated
kHz, at onset of clipping
driven
(60
(14
THD
power
for
5 min)
channel driven
both channels driven
ohms
Hz
7
I
k{z 4:11
kHz
I 15 kHz
't:1)
Power
8 ohm 4
Power
ohm
300w 480w
630W
600W
860W 1020W
510W
500w
<0.005%
<0.01
5%
<0.008%
Input
Line
Input
At rated
At rated
Input
Impedance
to Line, balanced
Sensitivity
output into
output into 4
CMRR
8 ohms
ohms
@lkHz
Voltage
Gain
@lkHz
Output Rise
20 kHz square wave
(leading
edge)
Time
127vpp
Slew Rate
20 kHz square wave 1?7vpp
(leading
edge)
25k ohm
(+3.8dBu)
1.2V
1.OV (+2.3dBu)
>80
dB
31 dB
(=
37x)
pS
2.4
4zvllts
Frequency
-0.5/ -0.15
-3dB:
Response
dB:
Output Impedance
@1kHz
Damping
1
kHz, 8 ohm load
@
Factor
/tu
20Hz-20kHz
5Hz-95kHz
15 milliohm
(typical)
(typical)
500
Signal
linear
A weighted
(30
Noise
/
kHz)
Crosstalk
@1kHz
Weight
net
packed
Dimensions
excluding handles
including
('19
handles
inch
EIA rack mounting,
ratio
3.5 x 19 x
88 x
3.5 x 19 x 17.9
88 x 482 x 455 mm
2 units high)
100
dB
104
dB
<
-90
37 .slb 117 ks
42.61h I 20kg
HxWxD
'14.8
482 x
375
dB
inch
mm
inch
Page 21

Specifications
2l
Model:
Output
E.l.A.
(pre-slrcss
single
both
Pulsed
10%
10olo
Bridge
2 Ohm
single
both
Distortion
0.5
@
THD
IMD
IMD
Frequency
-0.5/
-3dB:
Output
@1kHz
Damping
1
@
Power
'1
kHz,
at rated power
channel
channels
1
@
duty
cycle.
duty
cycle,
mode
capability
channel
channels
dB
below
1
kHz
@
SMPTE (60
CCIF ('l4kHzt1S
-0.15
dB:
Impedance
Factor
kHz,
I ohm
PA
-
<0.05%
driven
kHz,
driven
driven
THO
driven
at
onset
single
both channets
clipping
Hz I Z
Response
toad
12
for
of clipping
channet
re
4 ohms
kHz 4:j)
kHz
5 min)
driven
driven
j:1)
Power
8 ohm
430W
400w
1200w
800w
700w
<0.005%
<0.015o/a
<0.008%
20Hz-20kHz
5Hz-95kHz
15
milliohm
(typical)
500 (typical)
Power
4 ohm
700w
605W
930W
900w
1400w
Input
Line
Input
At rated
At
Input
Impedance
to
Line,
Sensitivity
output
rated
output
CMRR
@lkHz
Voltage
@lkHz
Output
20 kHz
(leading
Slew
20
(leading
Signal
linear (30
A weighted
square
edge)
Rate
kHz square
edge)
/ Noise
Crosstalk
1 kHz
@
Weight
net
packed
balanced
Gain
Rise
kHz)
into
into
Time
wave
wave
8
ohms
4
ohms
14SVpp
145vpp
ratio
25k ohm
1
.23V
1.1V
>80
33 dB
(=
2.4
50V/pS
100
105
<
42 lb
47
(+4dBu)
(+3dBu)
dB
45
x)
sS
dB
dB
-90
dB
i 19
.slb
I 21kg
k9
Australian
Monitor
Dimensions
excluding
including
(19
inch
handles
handles
EIA rack
mounting,
2
units
HxWxD
3.5
x 19
88 x 482
3.5 x 19
88 x 482
high)
x 14.8 inch
x
375 mm
x 17.9
inch
x 455
mm
/tu
Page 22

22
Specifications
Model:
Opal 1202/C300/PA-3
Output Power
'1
E.l.A.
(pre-stress
single
both
channels
Bridge
kHz,
at rated
channel
Mode
<0.05%
driven
driven
Distortion
0.5
dB below
@
THD
IMD
IMD
Frequency
-0.5/
-3dB
1 kHz
@
SMPTE
CCIF
-0.15d8
(60
(14kH'zl15
Response
THD
power
for
clipping re 4
Hz
7
/
kHz 4:1)
kHz
min)
5
ohms
1:1)
Power
Power
I ohm 4 ohm
120W
'120W
340W
<0.005%
<0.008%
20 Hz-20kHz
5 Hz- 95kHz
175W
160W
<0.005%
Input
Line
Input
At rated
Input
Impedance
to Line,
Balanced
Sensitivity
output into
CMRR
@1kHz
Voltage
Gain
@1kHz
Output Rise
20 kHz
(leading
square wave
edge)
Slew Rate
20 kHz square
(leading
edge)
8 ohms
Time
1 13Vpp
wave 145vpp
1
.23V
2.4
35V/pS
25 kohm
(+4dBu)
>81.5d8
28dB
(=
19
x)
pS
Output Impedance
@1kHz
Damping
1
kHz,I
@
Factor
ohm load
15
(typical)
milliohm
250'.1
Signal / Noise
linear (30
A weighted
kHz)
Crosstalk
@1kHz
Weight
net
packed
Dimensions
excluding handles
(19
inch
EIA rack
ratio
mounting,2
3.5 x 19 x
88 x 482 x
units hiqh)
102
dB
104d8
<-90d8
lb
33
37 lbllTkg
HxWxD
14.8 inch
375
/
'15k9
mm
/tu
Page 23

Specifications
23
Model
Output
E.l.A.
(pre-stress
single
both
Bridge
:
Power
1 kHz,
at rated power
channel
channels
Mode
Distortion
0.5 dB
@
THD
li/D
IMD
Frequency
-0.5i -0.15
-3dB
Output
below
1 kHz
@
SMPTE (60
CCIF
dB
Impedance
Opal
<0.05%
driven
(14
Response
driven
ctipping
Hz
I 7 k1z 4:1)
k9z
THD
I 15
2802/
for
5
re 4
ohms
kHz
C600/pA-6
Power
8 ohm
min)
215W
200w
560W
<0.005%
j:1)
<0.015%
<0.008%
20
Hz-20kHz
5Hz-95kHz
Power
4 ohm
300w
280W
Input
Line
to Line.
Input
At rated
Input
CMRR
@1kHz
Voltage
@1kHz
Output
20
kHz
square wave
(leading
Slew
20 kHz
(leading
Rate
square
Impedance
Balanced
Sensitivity
output into
Gain
Rise
Time
edge)
wave
edge)
I ohms
1 13vpp
145vpp
1
.23V
35V/pS
2.4
>81.5d8
31dB
(=37x)
25 kohm
(+4dBu)
pS
@1kqz
Damping
1 kHz,
@
8 ohm
Factor
load
15
milliohm
(typical)
250:1
Signal
linear (30
A weighted
/ Noise
kHz)
Crosstaik
@1kHz
Weight
net
packed
Dimensions
excluding
(19
inch
handles
EIA rack
ratio
mounting,
2
units high)
HxWxD
3.5 x 19
88
x 482 x
100
dB
104d8
-90d8
/
x 14-8
375 mm
'tskg
inch
33 lb
37 lbllTkg
Australian
Monitor
/tu