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Nº433 Power Amplifier
4. Balanced Input
Provides left, center and right-channel audio input. One XLR
connector per channel is available to accept balanced input signals
from an associated preamplifier.
For best performance, use balanced connections whenever possible.
Refer to the illustration below and to the associated preamplifier
documentation to ensure that Nº433 XLR input pin assignments
correspond to the associated preamplifier XLR output pin assign-
ments. If not, wire the cable so that the appropriate input pin
connects to the appropriate output pin.
Pin 1: Signal ground
Pin 2: Signal + (non-inverting)
Pin 3: Signal – (inverting)
Connector ground lug: chassis ground
Note
Before making balanced connections, remove the U-shaped shorting-
straps between pins 1 and 3 on the Nº433 XLR inputs and save them
for possible future use. Shorting-straps are installed when the Nº433 is
shipped.
5. RS-232 Communications Port
Provides serial control, performing flash memory software upgrades
and facilitating external control in AMX™ and Crestron™ systems.
One connector labeled RS-232 is available.
6. Communication Ports
Provide “links” to compatible Mark Levinson preamplifiers and
power amplifiers, allowing the Nº433 and linked preamplifiers or
power amplifiers to share Link controls. Two (one 8-pin RJ-45 and
one six-pin RJ-11) modular jacks labeled input and
output are available.
The input communication port can be connected to a
compatible Mark Levinson preamplifier that offers Link or
communication ports. Both the input and output
communication ports can be connected to a compatible Mark
Levinson power amplifier that offers communication ports.
Note
Refer to “Linking” on page 20, BEFORE linking the Nº433 to other Mark
Levinson components.