Specifications
lnstallation
1
I
PlsM
Fuse
Rating
8 Amps
Power
consumption
at idle
=
120Watts.
Power
consumption
at rated
power
=
1450
Watts.
P4rzu
Fuse
Rating
10 Amps
Mounting
Your
amplifier
is
designed
for
standard
1g"
rack
mounting
and
occupies
2 EIA rack
units
(3.5").
The
mounting
centers
are:
Vertical:
3.0"
(76.2mm)
Horizontal:
18.2"
(461.2mm)
to 18.7"
(473.8mm).
The slots in
the
mounting
flange
will
accept
bolt
diameters up
to 1/4"
(6.35mm).
We
recommend
that
you provide
additionalsupport
forthe
amplifier,
especially
if road
use is
planned,
as
the weight
can
bend
some
racks
otherwise. This
support
can
be
provided
by secure
shelving,
support
rails
or
a
rear
rack
mounting
strip to
match
up with the
rear
rack mount
ears
provided
on
your
Pl
Series
amplifier.
t
Cooling
Each
chann
el d
your
PAm/Pltmamplifier
is cooled
by
an axial fan
which
draws
cool air from
the front
of
the
unit and expels
the heated
air from
the rear of the
unit.
These
units
offer
two
speed fans
which
run at
half
speed,
switching
to full
speed
when
the intemal
heatsink
temperature
exceeds
600C
(1280
F).
An
unrestricted airflow
into
and
outfrom
the unit must
be
provided.
Any
restriction
of the
airflowwill
c€luse
3. Installation
Power
Requirements
Model:
Mains
Voltage
240,220-230
Model:
Mains Voltage
240,220-230
Power
consumption
at idle
=
160Watts.
lnput
signal
ground
is
not to
be used as a
safety
Power
consumption
at rated
power
=
22AOWatts.
ground
(earth).
Ensure
that
your
mains
voltage
is the
same
as the
lh91nu!toyouramplifierisa
balanced3-pinsystem
rear
panel
mains
voltage
marker
(+l-
1}o/o).
andrequiresallthreepinstobeconnected.
Onlyhigh
quality
twin-core
shielded
cable should
be used.
heat
to build up
within the
unit and
possibly
force
the
unit into its
thermal shutdown
mode.
lf the
units
are to
be operated
in an
environment
wherethe
airflow
is restricted
such as
sealed racks
or
even
when running
2 ohm loads,
the cooling should
be supplemented
by
extra cooling
fans
to evacuate
the heated
air and aid
the flow
of cool air through
the
unit.
Input
Wiring
IMPORTANT
Do not
directly
connecl
pin
1
on the
amplifieds input
or strapping
XLR, to the
amplifier's
chassis, speaker
ground
or
power
ground!
NOTE
When
wiring for
a
balanced
source
the
connector
going
to the input
of
your
amplifier
should
be
wired
as
follows:
Pin2
=
HOT
(ln
Phase
- non
inverting).
Pin
3
=
COLD
(Reverse
Phase - inverting).
Pinl
=GROUND/SHIELD.
\A/hen wiring
from
an
unbalanced
source
you
must
ensure
that
pin
3 is
connected
to
pin
1
(input
ground),
either
by
linking
the
pins
in
the
input connecloror
by
the source
equipment's
output wiring.
When wiring for
an
unbalanced
source:
Pin2
=
Hot
(in
phase
with
the
amplifier's output),
Pin
3
=
GrouncUShield
(ioins
to
pin
1).
Pin
1
=
Ground/Shield
NOTE:
ln-line
XLR connectors
often
have
a termination lug
thatconnects
directlyto
thechassis
of the connector.
Do
not
link
this
lug to
pin
1
at the
amplifier's input
as
it will
defeat the amplifier's
input
grounding
scheme.
This lug
is often
referred
to
as a
"drain"
and is used
to
provide
a termination
to the chassis
for shielding
purposes
when
a
floating
signal
ground
is required
between
the
source
and
destination, or when
disconnecting the
signal
ground
is required
to reduee
earth
loop noise,
ornoise
induced
intosignalgrounds
from stray magnetic
fields.
Aus;bdlan
Monitor