Specifications
Controls
&- Connectors
9
Rear
Panel
5
Balanced
Input
A
female
3-pin
XL type
connector
is
provided
on
each input:
Pin 1
=
SignalGround;
Pin
2
=
Hot
(non-inverting
or in
phase);
Pin
3
=
Cold
(inverting
or reverse
phase).
6a
Signal
Strapping
A
male
3-pin
XL type
connector
is
provided
and
wired in
parallel
with
the female
input
XLR
for
strapping
/ looping
signal
between
amplifiers.
7
Signal
Ground
Lift
Switch
When
this
switcfr
is engaged
it disconnects
signal
ground
from
the
input
connectors
on both
chan-
nels.
lt is
intended
to
be used
when
.hum"
is
caused
by
earth loops (due
to different
ground
potentials
between
source
equipment
and
the
amplifier)
or
stray
magnetic
field
pick
up on
the
input
ground/shield
wiring.
(lt
does
not
intenupt
signal
ground
continuity
on
the strapping
connec-
tor). The
amplifier
should
be tumed
off before
engaging
this
switchl
8
Binding
Post
Outputs
Touch
proof
binding
posts
(banana
jacks)
are
provided
for
speaker
output
termination
with
banana
plugs
orbarewire.
The red
post
is
used
as
positive
and the
black
post
is
used
as negative.
8a
SPEAKON
Ouput
Connector
The NEUTRIK (NL4MP)
4way
SpEAKON
con-
nector is
provided
as
an additional
speaker
output.
This
emerging
standard
of loudspeakerto
amplifi
er
connection
allows
a@ess
to
both channels
of the
amplifier
via
the
one
connec{or
for bi-amp
appli-
cations.
Channel-A
is
considered
the
dominant
channel
and
has
both
channelS
wired
to
the
Speakon
connector.
See the installation
section
of this
manual
for
detailed
information
on
Speakon
wiring.
9
Mains
Connection
Your
amplifier
is fitted
with
an internationally
recognised
IEC
mains
inlet
connector.
Please
ensure
that
the
connecting
mains
lead
for
usewiththis
conneclor
isof
an approvedtype
and
is
of sufficient
current
carrying
ability.
Your Ptlauand
P4tzm
require
a minimum
mains
lead rating
of
1 0
amps
when
operate
dfrom
a22O
to
24O volt
mains supply.
NOTE:
Your unit
must always
be
earthedt
10
Mains
Fuse
A
20mm x
Smm fuse
drawer is
provided
within
the
housing
of the
IEC mains
connector.
When
you
recieve your
amplifier
it
will
have
a working
fuse
and
a spare
fuse inside
the fuse
drawer.
The
drawer
can only be
opened
once
the
mains
lead
is removed
from
the connector.
The fuse
is
provided
to
protect
both the
mains
and
your
amplifier
as
well
as reducing
the degree
of
damage
if an
internal
fault
exists.
When replacing
the fuse,
replace
with
an
anti-
surge (slow
blow)
type
of the
current
rating
indicated
on the
back
panelabovethefuse
holder.
Warranty
does
not cover
a
blown
fuse
or any
resulting
damage
due
to an incorrect
fuse
rating
or
type.
The
PAau
requires
a 8 Amp
Anti-Surge
fuse.
The
P4tzu requires
a 10
Amp
Anti-Surge
fuse.
1l
Bridge
Switch
Pushing
this switch
in engages
the
BRTDGED/
MONO
mode of
operation.
ln
this
mode
your
amplifierwill
only
accept
signal
applied
to channel
A's
input
XLRs and
the level
of
both channels
will
be
controlled
by
channel
A's attenuator.
The
output
from
channel
B will
automatically
be
of the
opposite
polarity
(reversed phase)
and speaker
termination
should
be sourced
from
the red
binding-post
outputs.
D.C.
Rail
Fuses (Internally
fitted)
Removing
the bottom
lid
will
show
PCB mounted
fuse
holders
holding
the
rail fuse
for
each
supply
to each
channel.
These
3AG
.fast
blou/' type
fuses
are in series
with
the
positive
and
negative
supply
rails
for each
channel
of
your
amplifier,s
output
stage. Thesefuses
provide
overall
protec-
tion
of the
output
stage
and can
also
be
used
to
isolate
individual
channels
in
case
a
fault condi-
tion
exists.
lf
you
need to replace
the rail
fuses
they must
be
replaced
with
the same
type
and
cunent
rating:
Prfu
=
8 Amp.
Plrm
=
10 Amp.
NOTE:
Replacement
of
the fuses
should
only be
carried
out by
a
competent
and
experienced
person.
Aushdian
Monitor:
lfu