Audison LR 230, Owner'S Manual, Page: 3 / 14

ENGLISH
3
FEATURES
Supercurrent
series:
LR
230,
LR
250,
LR
270.
Two-channels
amplifiers
with
compact
dimensions and excellent musical performances. The
outstanding
features
of
their
sophisticated
circuitry
are:
"FRONT
END"
stages
realised
with
two
complementary
differential
stages,
polarized
by
two
low
noise
constant
current sources. The final stage configuration is made of an inverted triplet at pure symmetry. The
power
amplifier
is
realized
by
a
parallel
of
transistors
with
current
capacity
of
15
Amperes
each.
The
PWM
MOSFET
power
supply
has
been
particularly
designed
to
supply
the
amplification
stages
with
high
currents.
These
features
allow
to
drive
very
low
loads.
In
fact
this
series
of
amplifiers
has
been
called
Supercurrent
for
their
easiness
in
driving
loads
with
1
Ohm
nominal
impedance
when
they
are
connected
in
stereo
and
2
Ohms
nominal impedance when they are connected in bridge mono. Of
course,
as
they
are
amplifiers
with
very
compact
dimensions
in
relation
to
their
performances,
it
is
important
to
choose
a
well-ventilated
place
for
their
installation
or,
if
needed,
to
put
a
cooling
fan
near
them
when
they
work
at
very
low
loads,
in
order
to
avoid
excessive overheating.
PRECAUTIONS ·
In
order
for
this
device
to
function
properly
it's
important
that
it
is
installed
in
a
spot
where
temperature doesn't fall below 0
°
C (32
°
F) or rise above 55
°
C (131
°
F).
·
It must be installed in a dry and well ventilated spot.
·
The
power
supply
voltage
is
12
VCC
with
negative
to
ground.
Make
sure
that
the
characteristics of the vehicle electrical system are compatible with this device.
·
For
safe
driving
we
advise
to
listen
to
music
at
a
volume
level
that
won't
drown
external
traffic sounds.
INSTALLATION
For
mounting
use
4
self-threading
screws
and
protective
plastic
rings
provided.
For
a
very
good
result
we
suggest
to
use
audison
cable
products
to
complete
your
installation.
These
include:
power
cables,
signal
cables,
speaker
wires,
RCA
connectors
and
all
accessories
needed to complete the wiring.
WARNINGS ·
INPUTS:
If
the
radio-cassette
player
doesn't
share
the
output
GND
with
the
chassis,
the
braided
shield
of
the
shielded
cable
must
be
connected
to
the
radio-cassette
player
chassis.
·
OUTPUTS:
Never
connect
the
-R
and
-L
outputs
to
ground
or
to
each
other.
If
a
crossover
filter is used be sure its two channels don't have a common ground.
·
REGULATIONS:
If
you
hear
saturation
phenomena
at
moderate
volume
levels,
it
means
that
a
distorted
signal
is
coming
from
the
radio-cassette
player.
Turn
radio-cassette
player
volume
down
until
there's
no
longer
any
distortion.
Then
adjust
the
calibration
levels
of
the
amplifier until you hear slight saturation phenomena.
26
LR 270
MORE THAN 1000 WATTS WITH ELECTRONIC CROSSOVERS AND FADER
LR 270 LR 1140 M LR 1140 M
SUBWOOFERS
LEFT
PRE OUT
REAR
LR 270
LR 270
LR 270 LR 1140 M
PRE OUT
FRONT
LR 270
HI-PASS
FRONT-LEFT
SUBWOOFERS
RIGHT
BRIDGE
270 W - 4 Ohms
HI-PASS
REAR
MONO
285 W - 2 Ohms
MONO
285 W - 2 Ohms
LR 270 LR 1140 M
HI-PASS
FRONT-RIGHT
STEREO
75+75 W - 4 Ohms
BRIDGE
270 W - 4 Ohms
LXR2 SXR2