General Information; Connector And Cable Information - McIntosh MA12000 Owner's Manual

General Information

1. For additional connection information, refer to the
owner's manual(s) for any component(s) connected
to the MA12000.
2. Apply AC Power to the MA12000 and other
McIntosh Components only after all the system
components are connected together. Failure to do
so may cause a malfunction of system operations
as the Microprocessor's Circuitry inside the
components is active when AC Power is applied.
3. The MA12000 includes a Power Mode Auto Off
Feature and the default setting is enabled. For
additional information including how to disable it,
refer to page 25.
4. When Power Amplifier Protection Circuitry of the
MA12000 has activated, the LEDs under the Tubes
illuminate the Tubes amber to alert you.
5. When the Power Transformer has overheated
due to improper ventilation and/or high ambient
operating temperature, AC Power is removed from
the MA12000. Normal operation will resume when
the operating temperature is in a safe range again.
6. For the best performance and safety, it is important
to always match the impedance of the Loudspeaker
to the Power Amplifier connections.
Note: The impedance of a Loudspeaker actually varies as
the Loudspeaker reproduces different frequencies. As a
result, the nominal impedance rating of the Loudspeaker
(usually measured at a midrange frequency) might not
always agree with the impedance of the Loudspeaker
at low frequencies where the greatest amount of power
is required. Contact the Loudspeaker Manufacturer for
additional information about the actual impedance of
the Loudspeaker before connecting it to the McIntosh
MA12000.
7. The MA12000 Remote Control is capable of
operating other components. For additional
4
information go to www.mcintoshlabs.com.
8. The IR Input, with a 1/8 inch mini phone jack, is
configured for non-McIntosh IR sensors such as
a Xantech Model DL85K Kit. Use a Connection
Block such as a Xantech Model ZC21 when two
or more IR sensors need to be connected to the
MA12000. The signal from a connected External
IR Sensor will have priority over the signal from
the Front Panel IR Sensor.
9. When discarding the unit, comply with local
rules or regulations. Batteries should
never be thrown away or incinerated but
disposed of in accordance with the local
regulations concerning battery disposal.
10. For additional information on the
MA12000 and other McIntosh Products please visit
the McIntosh Web Site at www.mcintoshlabs.com.

Connector and Cable Information

XLR Connectors
Below is the Pin configuration for the XLR Balanced
Connectors on the MA12000. Refer to the diagram for
connection:
PIN 1: Shield/Ground
PIN 2: + Output
PIN 3: - Output
PIN 2
Power Control and Trigger Connectors
The Power Control Trigger Output Jacks send and
Passthru Input Jack receives Power On/Off Signals
(+12 volt/0 volt) when connected to other McIntosh
Components. An additional
connection is for controlling the
illumination of the Power Output
Meters on McIntosh Power
Amplifiers. A 3.5mm stereo mini
phone plug is used for connection
to the Power Control, Trigger and
Passthru Outputs.
Data Port Connectors
The Data Out Ports send Remote Control Signals
to Source Components. A 3.5mm
stereo mini phone plug is used for
connection.
IR IN Port Connectors
The IR IN Port also uses a 3.5mm
stereo mini phone plug and allows
the connection of other brand IR
Receivers to the MA12000.
RS232-C Data Port Cable
The RS232 Data Cable is a 3.5mm
stereo mini phone plug to a sub miniature DB 9
connector:
Data In
(DB9-pin2)
Binding Connector
When cables with spade lugs are used for Loudspeaker
Connection, the spade lugs need an
opening of at least 3/10 inch (7.6mm)
McIntosh Plug-In Jumper Connector
PIN 1 PIN 1 PIN 2
The MA12000 utilizes two phono
PIN 3
PIN 3
style Plug-In Jumpers to connect the
Preamplifier Output to the Power
Amplifier Input.
Note: The Jumper Connector is available from the
McIntosh Parts Department:
Main, Trig 1&2
McIntosh Jumper Connector
and Pass-Thru
Part No. 11808000
Power
Control
Meter
Illumination
Control
Ground
Data
Signal
N/C
IR Data
Control
N/C
DB9
(male connector)
PIN 1
Data Out
(DB9-pin3)
Ground
PIN 6
(DB9-pin5)
Data
Ground
Ground
PIN 5
PIN 9
3/10 of an inch
(7.6millimeters)