Mark Levinson 431 Owner's Manual download pdf (Page 17)

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.

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Mark Levinson 431 Owner's Manual Page 17