Australian Monitor KA1500 - Manual (Page 9)

Rear Panel
6 Balanced Input
A female 3-pin XL type connector is provided on
each input:
Pin 1 = Signal Ground;
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 switch is engaged it disconnects signal
ground from the input connectors on both channels.
It 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. (It does not interrupt signal ground
continuity on the strapping connector). The
amplifier should be turned off before engaging
this switch!
8 Binding Post Outputs
Touch proof binding posts (banana jacks) are
provided for speaker output termination with
banana plugs or bare wire. The red post is used as
positive and the black post is used as negative.
8a SPEAKON Output Connector
The NEUTRIK (NL4MP) 4way SPEAKON
connector is provided as an additional speaker
output. This emerging standard of loudspeaker to
amplifier connection allows access to both
channels of the amplifier via the one connector for
bi-amp applications. 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 Lead
Your amplifier is supplied with a heavy duty mains
lead (power cord) appropriately rated for the
mains supply voltage marked on the rear panel of
your amplifier.
Controls & Connectors 9
The wires in the mains lead are colored in
accordance with the following code:
BROWN = ACTIVE;
BLUE = NEUTRAL;
GREEN AND YELLOW = EARTH.
Your unit must always be earthed!
10 Mains Circuit Breaker
A “push to reset” thermal circuit breaker is supplied
on your amplifier providing overall protection of
your amplifier’s power supply. It will isolate the
"active" mains conductor in the event of a high
current internal fault or in continued overload
conditions.
Please ensure that the connecting mains lead for
use with this connector is of an approved type and
is of sufficient current carrying ability.
11 Bridge Switch
Pushing this switch in engages the BRIDGED/
MONO mode of operation. In this mode your
amplifier will 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 reveal PCB mounted
fuse holders holding the 10 Amp rail fuse for each
supply to each channel. These 10 Amp, 3AG “fast
blow” type fuses are in series with the positive and
negative supply rails for each channel of your
amplifier’s output stage. These fuses provide
overall protection of the output stage and can also
be used to isolate individual channels in case a
fault condition exists.
If you need to replace the rail fuses they must be
replaced with the same type and current rating:
NOTE: Replacement of the fuses should only be
carried out by a competent and experienced
person.