A&R Power Amplifier SA150 User guide
Contents
Introduction
1
Installing
and
using
your
SA150/SA200
2
Back
Panel
connections
2
Front
Panel
controls
4
Fitting
or
changing
side
cheeks
5
Technical
Details
6
Spares
Kit
6
Input
Connector
Wiring
6
Fuses
7
Removal
of
Top
Cover
9
SA150
Technical
Specification
10
S
A200
T
echnical
Specification
11
Guarantee
for
UK
sales
Inside
back
cover
Important
Notice
1.
If
your
SA150
or
SA200
is
not
delivered
fitted
with
solid
wood
side
cheeks
it
will
instead
be
supplied
with
thin,
black,
metal
transit
panels.
These
must
be
removed
and
the
appropriate
wood
side
cheeks
fitted
before
the
amplifier
is
first
used.
See
page
5
for
full
details.
2.
Please
retain
the
carton
and
all
packing
materials
provided
with
this
equipment
so
that
it
may
be
repacked
correctly
if
it
ever
becomes
necessary
to
transport
the
unit
or
to
return
it
for
service.
,
3.
If
servicing
is
required
then
the
equipment
should
be
properly
packed
and
returned
to
the
dealer
from
whom
it
was
purchased.
It
is
essential
to
include
a
covering
letter
giving
your
name
and
address
and
a
brief
but
thorough
description
of
the
fault.
Introduction
The
A&R
Cambridge
SA150
and
SA200
are
robust
high
performance
stereo
power
amplifiers.
Their
continuous
power
ratings
(into
8
ohm
loads)
are
75
Watts
and
100
Watts
per
channel
respectively.
Used
with
a
suitable
pre-amplifier
or
control
unit
(e.g.
the
A&R
C200)
either
model
will
form
the
basis
of
a
top
quality
sound
system.
These
units
are
built
to
the
highest
standards
and
are
designed
to
blend
well
with
domestic
surroundings.
Solid
Afromosia
side
cheeks
of
the
same
height
as
the
amplifiers
are
normally
supplied
as
standard;
a
set
of
tall
side
cheeks
for
stacking
either
amplifier
with
the
matching
A&R
C200
control
unit
is
available
as
an
optional
extra.
For
very
high
power
operation
both
the
SA150
and
SA200
are
convertible
to
“bridged
mono”
operation.
Please
consult
your
dealer
for
further
information
and
availability.
Please
study
this
manual
carefully
to
ensure
that
you
get
the
best
results
from
your
amplifier.
Remember
your
dealer
is
there
to
help
you.
He
has
full
technical
and
service
information
for
all
A&R
Cambridge
products
and
considerable
experience
of
their
use
in
a
variety
of
systems.
If,
however,
he
is
unable
to
answer
your
query
then
do
not
hesitate
to
contact
us
directly.
Installing
and
using
your
SA150/SA200
Back
Panel
Connections
Mains
Supply
The
SA150
and
SA200
are
normally
set
up
for
use
with
a
nominal
240V
50/60
Hz
supply.
They
can
be
modified
for
220V
or
120V
operation
by
your
dealer
or
the
manufacturer.
CSA
(North
American)
models
are
suitable
for
120V
supplies
only.
The
correct
supply
voltage
is
marked
on
the
rear
panel
underneath
the
AC
power
supply
inlet.
The
AC
power
supply
inlet
of
the
SA150
and
5A200
is
via
a
standard
IEC
chassis
mounting
plug.
A
moulded
IEC
socket,
fitted
with
2
metres
(6.5
ft)
of
cable,
is
supplied
to
fit
the
IEC
plug
(Note
that
the
IEC
plug
and
socket
are
a
tight
fit;
before
first
using
the
amplifier
it
is
therefore
important
to
ensure
that
the
socket
is
pushed
home
firmly
into
the
amplifier's
chassis
plug).
The
wire
end
of
the
cable
should
be
terminated
with
a
3
pin
(earthed)
plug,
wired
according
to
the
international
colour
code
and
fitted
with
a
10
Amp
or
13
Amp
fuse.
The
international
colour
code
is:
Earth
—
green/yellow
Live
—
brown
Neutral
—
blue
Some
models
may
already
have
a
suitable
plug
fitted
as
standard.
The
SA150
and
SA200
also
have
an
anti-surge
mains
fuse
fitted
internally.
It
is
recommended
that
the
supply
to
each
model
should
be
disconnected
when
the
amplifier
is
not
in
use.
UNDER
NO
CIRCUMSTANCES
SHOULD
THE
AMPLIFIER
COVER
BE
REMOVED
UNLESS
THE
SUPPLY
IS
DISCONNECTED.
Input
Connections
A
combination
of
5
pin
DIN
socket
and
phono
connectors
is
fitted
as
standard.
Certain
models
may
however
only
have
either
DIN
or
phono
sockets
fitted.
In
all
cases
the
panel
carrying
these
sockets
is
removable
to
enable
special
versions
to
be
supplied,
e.g.
for
“bridged
mono”
operation
or
professional
applications.
Contact
your
dealer
or
the
factory
for
further
details.
2
Loudspeaker
Connections
The
outputs
of
the
SA150
and
SA200
are
suitable
for
driving
loudspeakers
of
4
ohms
nominal
impedance
or
higher.
Both
models
will
drive
4
ohm
loads
whose
impedance
dips
to
as
low
as
2
ohms,
but
care
should
be
taken
not
to
operate
continuously
at
high
levels
into
impedances
of
less
than
4
ohms.
The
loudspeaker
terminals
will
accept
either
bare
wires
or
4mm
plugs.
The
left
hand
speaker
has
its
pair
of
terminals
near
the
left
hand
of
the
rear
panel
(when
viewing
from
the
front
of
the
amplifier);
the
right
hand
speaker
terminals
are
near
the
centre
of
the
rear
panel.
The
spacing
of
the
terminals
is
19mm
(0.75
inch)
to
accept
standard
twin
speaker
plugs.
One
side
of
your
speaker
(normally
the
-side)
should
be
connected
to
the
black
terminal;
the
other
(the
+side)
should
be
connected
to
the
red
terminal.
For
stereo
applications
it
is
important
to
ensure
that
the
two
speakers
are
connected
in
phase
(i.e.
both
wired
the
same
way
round
to
the
amplifier).
Do
not
make
any
connections
between
the
left
and
right
loudspeaker
leads
(except
in
“bridged
mono”
applications—see
separate
instruction
sheet).
The
SA150
and
SA200
are
unconditionally
stable
and
suitable
for
use
with
all
types
of
loudspeaker
leads,
including
the
‘high
definition’
types.
For
good
practical
results
we
recommend
the
use
of
heavy
duty
cables
having
at
least
2
sq
mm
cross
sectional
area
for
each
conductor.
It
is
also
good
practice
for
the
two
speaker
leads
to
be
of
equal
length
and
you
should
ensure
that
all
connections
at
both
the
amplifier
and
speaker
are
tight.
It
is
possible
to
use
several
pairs
of
loudspeakers
in
parallel
with
the
SA150
or
SA200
provided
the
overall
impedance
does
not
fall
below
the
limits
described
above.
No
speaker
switching
is
provided
on
the
amplifiers
as
this
invariably
will
cause
some
degradation
of
the
signal,
however
slight.
If
it
is
necessary
to
switch
speakers
we
recommend
that
the
main
pair
be
wired
directly
to
the
amplifier
wherever
possible
and
that
only
the
‘extension’
speakers
be
switched.
With
both
models
it
is
possible
to
reduce
the
value
of
output
fuse
fitted
in
the
amplifier
in
order
to
provide
the
best
protection
for
both
the
speaker
and
amplifier.
See
page
7
for
full
details.
Heat
Sink
The
heat
produced
by
the
SA150
and
SA200
is
dissipated
into
the
air
by
the
large
cast
heat
sinks
whose
fins
form
most
of
the
rear
panel.
When
the
amplifier
is
in
use
these
will
run
warm
and
may
become
quite
hot
when
the
unit
is
run
near
full
power,
particularly
into
low
impedance
loads.
This
is
perfectly
normal.
However,
if
the
fins
become
too
hot
to
touch
switch
off
the
amplifier
at
once
and
consult
your
dealer.
N.B.
To
ensure
that
the
amplifier
does
not
overheat
it
is
important
that
the
natural
flow
of
air
over
the
heat
sinks
is
not
obstructed.
It
is
also
unwise
to
place
heat
sensitive
items
(such
as
L.P.
records)
on
top
of
or
immediately
above
the
amplifier.
Front
Panel
Controls
switch
Mains
Power
To
switch
on
the
amplifier,
depress
the
power
on/off
switch
located
on
the
extreme
right
of
the
front
panel
until
it
latches
home.
The
small
rectangular
LED
(light
emitting
diode)
adjacent
to
the
switch
should
glow
green.
To
turn
off
the
power
amplifier
depress
the
power
on/off
switch
again
so
that
it
unlatches.
The
SA150
and
SA200
generate
very
little
in
the
way
of
undesirable
switching
surges
into
the
loudspeakers
when
they
are
turned
on
and
off
but
they
will
faithfully
amplify
any
surges
generated
by
preceding
equipment.
As
the
amplifiers
are
very
powerful,
these
surges
may
cause
damage
to
certain
loudspeakers
through
no
fault
of
the
power
amplifier.
Note
that
any
A&R
equipment
likely
to
be
used
with
the
SA150
or
SA200
(e.g.
C200
control
unit
or
A60AP
amplifier)
is
fully
suppressed,
so
that
no
switch
on
surge
will
occur.
However,
if
your
pre-amplifier
is
in
any
way-
suspect
it
is
wise
to
turn
on
the
power
amplifier
some
moments
after
switching
on
the
pre-amplifier,
in
order
to
allow
the
pre-amplifier’s
circuits
to
settle
down.
Similarly,
the
power
amplifier
should
be
turned
off
well
before
the
preamplifier
in
order
to
allow
its
power
supply
to
discharge
fully.
LED
Overload
Indicator
On
both
the
SA150
and
SA200
the
front
panel
LED
to
the
left
of
the
power
on/off
switch
normally
glows
green
to
show
that
the
DC
power
supplies
in
the
amplifier
are
operating.
It
will
continue
to
glow
green
for
a
short
time
after
the
amplifier
is
switched
off
as
the
DC
voltages
decay.
On
the
SA200
only
the
LED
also
functions
as
an
overload
indicator.
If
either
channel
of
the
SA200
clips
or
distorts
significantly
then
the
LED
will
change
colour
momentarily
from
green
to
red.
If
the
overload
is
maintained
then
the
LED
will
glow
red
continuously
and
to
avoid
possible
speaker
damage
the
preamplifier
volume
control
should
be
turned
down
immediately.
Fitting
or
Changing
Side
Cheeks
If
your
SA150
or
SA200
is
not
already
supplied
fitted
with
Afromosia
wood
side
cheeks
it
will
be
fitted
with
thin
metal
transit
panels.
These
must
be
removed
and
the
appropriate
wood
side
cheeks
fitted
before
the
amplifier
is
first
used.
The
wood
cheeks
are
available
in
two
heights—standard
(95mm)
and
tall
(145mm).
The
latter
leaves
sufficient
clearance
underneath
the
SA200
to
accept
the
C200
control
unit.
To
fit
the
cheeks,
proceed
as
follows
(see
figures
3
and
4):-
1.
Ensure
the
SA200
is
disconnected
from
the
mains
supply.
2.
Using
a
N°
2
‘Posidriv’
screwdriver
remove
the
four
bright
metal
screws
from
each
side
of
the
amplifier.
This
will
free
the
transit
cheeks.
Do
not
attempt
to
remove
the
black
screws
as
these
hold
together
parts
of
the
main
chassis.
3.
Fit
the
wooden
end
cheeks
using
the
M4
hex
socket
cap
screws
and
washers
provided.
The
screws
must
be
tightened
firmly
with
the
Allen
Key
provided.
Ensure
that
the
wooden
cheeks
are
fitted
the
right
way
round;
they
are
counter-bored
where
necessary
to
clear
protrusions
on
the
amplifier
chassis.
Note
that
the
two
side
cheeks
are
identical.
To
exchange
side
cheeks
(e.g.
from
standard
height
to
tall)
simply
unscrew
the
M4
hex
socket
cap
screws
holding
in
each
old
cheek.
The
new
pair
may
then
be
fitted
following
the
procedure
of
paragraph
3
above.
Never
operate
the
amplifier
without
the
proper
side
cheeks
fitted
as
this
could
constitute
a
safety
remove
these
screws
using
no.
2
Posidriv
left
hand
side
screwdriver
right
hand
side
Figure
3.
Transit
Side
Panel
Removal
side
cheek
side
cheek
Figure
4.
Fitting
Wooden
Side
Cheeks.
5
Technical
Details
Spares
Kit
You
are
provided
with
a
spares
and
accessory
kit
containing
the
following:-
SA150
1
IEC
line
socket
with
2m
(6.5ft)
mains
lead.
1
3mm
AF
Allen
key.
2
Spare
speaker
fuses
(2.5
Amp
fast
blow,
20mm
x
5mm).
2
Spare
speaker
fuses
(1.6
Amp
fast
blow,
20mm
x
5mm).
SA200
1
IEC
line
socket
with
2m
(6.5ft)
mains
lead.
1
3mm
AF
Allen
key.
2
Spare
speaker
fuses
(3.15
Amp
fast
blow,
20mm
x
5mm).
2
Spare
speaker
fuses
(2
Amp
fast
blow,
20mm
x
5mm).
In
addition,
if
either
amplifier
is
not
already
provided
with
factory
fitted
wooden
side
cheeks
the
spares
kit
will
also
contain
8
M4
x
16mm
hex
socket
cap
screws
and
M4
washers,
plus
one
pair
of
side
cheeks
(either
short
or
tall).
Input
Connector
Wiring
Viewed
from
rear
of
amplifier,
or
plug
as
wired
(see
Figure
5).
—o
Figure
5
For
connecting
either
model
to
the
A&R
C200
control
unit
(standard
DIN
output
version)
or
the
A&R
A60
AP
amplifier,
a
crossover
DIN
to
DIN
lead
is
required.
A&R
leads
type
L—05
(0.6m,
2ft)
or
L—
05/2
(2
metres,
6.5ft)
are
recommended.
Either
lead
may
also
be
used
to
connect
the
SA150
and
SA200
to
most
other
manufacturers’
pre-amplifiers
which
use
a
5
pin
180°
DIN
socket
with
the
output
signals
on
pins
1
&
4.
The
phono
sockets
may
also
be
used
to
connect
the
SA150
or
SA200
to
a
suitable
pre-amplifier.
For
best
results
only
interconnecting
leads
of
the
highest
quality
should
be
used.
The
input
impedance
of
both
the
SA150
and
SA200
is
20
k!2
and
the
voltage
gain
of
each
channel
of
both
models
is
29dB
(28.3
times).
This
is
equivalent
to
an
input
sensitivity
of
1.00V
r.m.s.
for
100
Watts
r.m.s.
into
8
ohms
for
the
SA200
and
0.87V
r.m.s.
for
75
Watts
r.m.s.
into
8
ohms
for
the
SA150.
These
figures
ensure
that
both
power
amplifiers
should
work
with
almost
all
pre-amplifiers
and
signal
sources
which
provide
nominal
outputs
of
between
500mV
and
2V
r.m.s.
If
in
doubt
consult
your
dealer.
Fuses
Output
Fuses
Both
the
SA150
and
SA200
are
fitted
with
fuses
(one
per
channel)
in
their
output
circuits
to
provide
extra
protection
for
both
amplifier
and
loudspeakers
in
the
event
of
medium
to
long
term
overloads.
Each
fuse
is
placed
within
the
feedback
loop
of
its
power
amplifier
channel
to
eliminate
the
audible
effects
of
having
a
speaker
fuse
in
series
with
the
loudspeaker.
In
addition,
in
the
SA200
only,
the
circuit
is
so
designed
that,
if
an
output
fuse
blows,
not
only
will
the
sound
from
the
loudspeaker
cease
but
the
overload
LED
on
the
front
panel
will
glow
red
almost
continuously
if
any
attempt
is
made
to
play
music
through
the
system
at
normal
volume
settings.
This
is
a
certain
indication
that
one
or
both
speaker
fuses
have
failed
and
need
replacing
(see
over).
Choosing
Output
Fuse
Ratings
The
output
fuses
fitted
to
the
SA150
and
SA200
are
of
a
sufficient
value
to
ensure
that
the
amplifier
will
drive
4
ohm
loudspeakers
satisfactorily,
with
little
risk
of
the
fuses
failing
on
normal
programrhe
material.
However
many
loudspeakers
have
a
much
higher
average
impedance
than
4
ohms
and
in
order
to
provide
them
with
the
optimum
protection
against
overdriving,
it
may
be
desirable
to
fit
output
fuses
of
a
somewhat
lower
rating.
Suitable
spares
for
nominal
8
ohm
loudspeakers
are
provided
with
the
SA150
and
SA200,
as
shown
in
the
table
below.
Some
suitable
values
for
fuses
(not
supplied)
which
may
be
used
with
16
ohm
loudspeakers
are
also
shown.
In
all
cases
it
is
wise
to
use
the
lowest
fuse
value
possible
which
does
not
fail
on
normal
programme
material
and
some
experimentation
may
be
worthwhile
here.
Similarly,
if
loudspeakers
are
used
which
will
not
accept
the
full
power
output
of
the
amplifier,
then
the
fuses
should
also
be
down
rated
in
order
to
provide
the
loudspeakers
with
best
possible
protection
against
overload.
If
in
doubt
consult
your
dealer
or
the
loudspeaker
manufacturer.
Nominal
impedance
of
loudspeaker
Suggested
fuse
value
|
SA150
SA200
4
ohms
2.5
Amp
3.15
Amp
8
ohms
1.6
Amp
2.0
Amp
16
ohms
1.0
Amp
1.25
Amp
In
all
cases
the
fuses
used
should
be
20mm
x
5mm
“fast
blow”
types.
IN
NO
CIRCUMSTANCES
SHOULD
“SLOW
BLOW”
OR
“ANTI
SURGE”
FUSES
BE
USED,
OR
VALUES
GREATER
THAN
THE
HIGHEST
LISTED
IN
THE
TABLE
ABOVE.
THIS
WOULD
RESULT
IN
INADEQUATE
PROTECTION
OF
THE
AMPLIFIER
AGAINST
OVERLOAD
AND
WILL
INVALIDATE
THE
GUARANTEE.
Power
Supply
Fuses
These
are—2.5
Amp
fast
blow
20mm
x
5mm
diameter
fuses
(model
SA150).
These
are—3.15
Amp
fast
blow
20mm
x
5mm
diameter
fuses
(model
SA200).
THEY
ARE
NOT
USER
REPLACEABLE.
If
any
of
these
fuses
fail
there
is
probably
a
fault
in
the
amplifier—do
not
change
the
fuses
but
consult
your
dealer.
Mains
Fuses
All
models
are
fitted
with
an
anti
surge
(slow
blow}
20mm
x
5mm
diameter
fuse,
designed
to
protect
against
faults
in
the
amplifier,
transformer
and
mains
switch.
The
values
are
shown
below:
SA200
(all
voltages)
5A
SA150
(220/240V)
1.6A
SA150
(120V)
3.15A
THESE
FUSES
ARE
NOT
USER
REPLACEABLE
Should
the
SA150
or
SA200
fail
to
function
at
switch-on
the
fault
is
probably
external
to
the
amplifier.
In
particular,
check
the
fuse
in
the
mains
plug
(and
distribution
board,
if
used)
before
suspecting
the
power
amplifier.
The
switch-on
surge
currents
of
the
SA150
and
SA200
are
very
great
which
is
why
a
10
or
13
Amp
fuse
is
recommended
for
the
mains
plug.
You
should
also
ensure
that
the
IEC
mains
socket
is
pushed
seucrely
home
into
the
IEC
plug
on
the
back
panel
of
the
amplifier.
Inspecting
and
Changing
Fuses
In
order
to
inspect
or
change
the
fuses
you
will
need
to
remove
the
top
cover
(see
Figures
6
and
7).
BEFORE
REMOVING
THE
COVER
ALWAYS
SWITCH
OFF
THE
AMPLIFIER
AND
DISCONNECT
THE
MAINS
SUPPLY.
NOTE
THAT
THE
MAINS
FUSE
REMAINS
LIVE
WHENEVER
THE
AMPLIFIER
IS
PLUGGED
INTO
THE
MAINS,
EVEN
WHEN
THE
AMPLIFIER
SWITCH
IS
IN
THE
OFF
POSITION.
To
remove
the
top
cover
use
a
No
1
‘Posidriv’
screwdriver
to
take
out
the
three
black
screws
located
along
the
top
rear
edge
of
the
amplifier,
above
the
heat-sinks.
The
cover
may
then
be
lifted
gently
upwards
and
backwards
in
order
to
free
it
from
its
locating
slot
in
the
front
panel.
The
positions
of
the
fuses
are
shown
in
Figure
4.
Replacement
of
the
cover
is
a
straight
reversal
of
the
above
procedure.
left
hand
_
output
fuse
max
2.5
Amp
quick
blow
(SA150)
max.
3.15
Amp
quick
blow
(SA200)
DO,
1CXV
)(
)
ioOO
•
right
hand
output
fuse
max.
2.5
Amp
quick
blow
[SA150)
rnax.
3.15
Amp
quick
blow
(SA200)
mains
fuse
NOT
USER
REPLACEABLE
power
supply
fuses
-
R
FPLA(
*
Figure
6.
Location
of
Fuses
lift
rear
of
cover
and
withdraw
in
direction
shown
Cover
SA150
Technical
Specification
Inputs
Fixed
level
inputs
are
connected
to
pin
3
(LEFT)
and
pin
5
(RIGHT)
of
a
5
pin
180°
DIN
socket
and/or
two
phono
sockets
located
in
the
rear
sub
panel.
This
sub
panel
is
removable
to
allow
other
types
of
connector
to
be
substituted,
if
required.
Sensitivity
0.87V
(ref.
75W/8ohms.
1
kHz)
Gain
to
loudspeaker
terminals
29.0
dB
at
1
kHz,
non-in
verting
Signal/noise
ratio
>
100
dB,
unweighted
or
CCIR/ARM
weighted,
(ref.
75W/8
ohms)
Input
impedance
20
kfl
Outputs
Loudspeaker
outputs
are
via
red
and
black
heavy
duty
screw
terminals.
These
will
accept
bare
wires
or
4mm
(‘Banana’)
plugs.
Suitable
for
4-16
ohm
loudspeakers.
The
continuous
power
output,
both
channels
driven
(at
0.08%
t.h.d.,
20
Hz-20
kHz),
exceeds
75W/channel
into
8
ohms
110W/channel
into
4
ohms
The
typical
maximum
power
output
at
1
kHz,
at
clipping
(0.1%
t.h.d.),
both
channels
driven
is
90W/channe!
into
8
ohms
125W/channel
into
4
ohms
Total
Harmonic
Distortion
At
any
level
up
to
75W/8
ohms,
1
kHz
>
0.03%
(typ.
0.01%)
At
any
level
up
to
110W/4
ohms,
1
kHz
>
0.05%
(typ.
0.02%)
Frequency
Response
+
0,
-
0.5
dB
10
Hz-20
kHz.
It
is
recommended
that
the
pre-amplifier’s
high
frequency
response
should
be
curtailed
to
at
least
-
3
dB
at
50
kHz.
Power
Requirements
240VAC,
48-63
Hz,
500VA
maximum.
The
unit
may
be
dealer
adjusted
to
work
at
220V
or
120V
if
required.
Dimensions
(overall)
Width
464mm
(18V4
H
)
Height
95mm
(3
3
A")
Depth
350mm
(13
3
/4")
Weight
Net
9
kg
(20
lb)
Packed
13
kg
(29
lb)
SA200
Technical
Specification
Inputs
Fixed
level
inputs
are
connected
to
pin
3
(LEFT)
and
pin
5
(RIGHT)
of
a
5
pin
180°
DIN
socket
and/or
two
phono
sockets
located
in
the
rear
sub
panel.
This
sub
panel
is
removable
to
allow
other
types
of
connector
to
be
substituted,
if
required.
Sensitivity
1.00V
(ref.
100W/8ohms,
1
kHz)
Gain
to
loudspeaker
terminals
29.0
dB
at
1
kHz,
non-inverting
Signal/noise
ratio
>
100
dB,
unweighted
or
CCIR/ARM
weighted,
(ref.
100W/8
ohms)
Input
impedance
20
kfl
Outputs
Loudspeaker
outputs
are
via
red
and
black
heavy
duty
screw
terminals.
These
will
accept
bare
wires
or
4mm
(‘Banana’)
plugs.
Suitable
for
4-16
ohm
loudspeakers.
The
continuous
power
output,
both
channels
driven
(at
0.08%
t.h.d.,
20
Hz-20
kHz),
exceeds
lOOW/channel
into
8
ohms
160W/channel
into
4
ohms
The
typical
maximum
power
output
at
1
kHz,
at
clipping
(0.1%
t.h.d.).
both
channels
driven
is
125W/channel
into
8
ohms
195W/channel
into
4
ohms
Total
Harmonic
Distortion
At
any
level
up
to
100W/8
ohms,
1
kHz
<
0.03%
(typ.
0.01%)
At
any
level
up
to
160W/4
ohms,
1
kHz
<
0.05%
(typ.
0.02%)
Frequency
Response
+
0,
-
0.5
dB
10
Hz-20
kHz.
It
is
recommended
that
the
pre-amplifier’s
high
frequency
response
should
be
curtailed
to
at
least
-
3
dB
at
50
kHz.
Power
Requirements
240
VAC,
48-63
Hz,
600
VA
maximum.
The
unit
may
be
dealer
adjusted
to
work
at
220V
or
120V
if
required.
Dimensions
(overall)
Width
464mm
{IS
1
/*")
Height
95mm
(3
3
/4
n
)
Depth
350mm
{13
3
/4
W
)
Weight
Net
10.0
kg
(22
lb)
Packed
14.0
kg
(31
lb)
Guarantee
for
U.K.
Sales
This
equipment
has
been
fully
tested
and
a
full
record
of
these
tests
made
before
despatch
from
the
factory.
Both
the
workmanship
and
the
performance
of
this
equipment
are
(except
as
set
out
below)
guaranteed
against
defects
for
a
period
of
one
year
from
the
date
of
purchase
provided
that
it
was
originally
purchased
from
an
authorised
U.K.
dealer
under
a
consumer
sale
agreement.
(The
words
“consumer
sale”
shall
be
construed
in
accordance
with
Section
15
of
the
Supply
of
Goods
(Implied
Terms)
Act
1973).
The
Manufacturers
can
accept
no
responsibility
for
defects
arising
from
accident,
misuse,
wear
and
tear,
neglect
or
through
unauthorised
adjustment
and
or
repair,
neither
can
they
accept
responsibility
for
damage
or
loss
occurring
during
transit
to
or
from
the
person
claiming
under
this
guarantee.
This
guarantee
covers
both
labour
and
parts
and
is
transferable
to
subsequent
purchasers
but
the
liability
of
the
Manufacturers
is
limited
to
the
cost
of
repair
or
replacement
(at
the
discretion
of
the
Manufacturers)
of
the
defective
parts
and
under
no
circumstances
extends
to
consequential
loss
or
damage.
Claims
under
this
guarantee
This
equipment
should
be
packed
in
the
original
packing
and
returned
to
the
dealer
from
whom
it
was
purchased
or,
failing
this,
any
other
authorised
A&R
Cambridge
dealer.
If
it
is
not
possible
to
return
the
equipment
by
hand,
then
it
should
be
sent
carriage
prepaid
by
a
reputable
carrier.
Should
the
original
packing
not
be
available,
replacement
packing
can
be
purchased
from
the
Manufacturers.
The
equipment
should
not
be
sent
by
post.
DO
NOT
CONSIGN
THE
EQUIPMENT
TO
A&R
CAMBRIDGE
UNLESS
YOU
HAVE
FIRST
BEEN
SPECIFICALLY
REQUESTED
TO
DO
SO
BY
THE
MANUFACTURER’S
TECHNICAL
SERVICE
DEPARTMENT.
DO
NOT
UNDER
ANY
CIRCUMSTANCES
ATTEMPT
TO
DISASSEMBLE
THE
EQUIPMENT
BEFORE
DESPATCH.
If
you
have
any
difficulty
complying
with
these
requirements,
please
contact
the
Manufacturers
at
the
following
address:-
A&R
Cambridge
Limited,
Denny
End
Industrial
Centre,
Waterbeach,
Cambridge
CB5
9PB.
Tel:
(0223)
861550
Telex:
817345
(ARCAM
G)
In
either
case
you
should
state
clearly
your
name
and
address,
the
date
and
place
of
purchase,
together
with
a
brief
description
of
the
fault
experienced.
In
the
event
of
equipment
being
returned
which
on
test
is
found
to
comply
with
the
published
specification
the
Manufacturers
reserve
the
right
to
charge
a
reasonable
fee
for
testing
the
equipment
and
for
return
carriage.
Enquiries
The
Manufacturers
are
happy
to
answer
any
queries
you
may
have
regarding
the
use
of
this
equipment
on
the
condition
that
this
enquiry
is
by
letter
and
a
stamped
addressed
envelope
is
provided.
You
should
state
clearly
the
serial
number
of
the
unit,
the
dealer
from
whom
it
was
purchased
and
the
date
of
purchase.
THIS
GUARANTEE
IN
NO
WAY
VARIES
OR
REMOVES
A
PURCHASER’S
STATUTORY
RIGHTS.
Printed
by
Clanpress
(King’s
Lynn)
Ltd.,
King’s
Lynn,
Norfolk,
Issue
1
March
1983
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