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4. Balanced Input
Provides left and right-channel audio input. One stereo XLR
connector 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 Nº432/431 XLR
input pin assignments correspond to the associated preamplifier
XLR output pin assignments. 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 Nº432/431 XLR
inputs and save them for possible future use. These shorting-
straps are installed when the Nº432/431 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 control is available.
6. Communication Ports
Provide “links” to compatible Mark Levinson preamplifiers
and power amplifiers, allowing the Nº432/431 and linked
preamplifiers or power amplifiers to share Link controls. Two
6-pin modular RJ-11 jacks labeled input and
control 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
control communication ports can be connected to a
compatible Mark Levinson power amplifier that offers
communication ports.
Note Refer to “Linking” BEFORE linking the Nº432/431 to other Mark
Levinson components.