McIntosh MXA70, Owner'S Manual

Page: 4 / 32

4
by the MXA70 Remote Control. For additional
information refer to the Owner’s Manual supplied
with the other McIntosh Component and look in
the “Setup Section - Remote Control Codes” of
the manual. In those rare instances where using
the “Alternate Codes” is not possible, the Remote
Control Sensor on the MXA70 can be switched Off
and the Front Panel Controls can be used for opera-
tion instead of using the Remote Control. Refer to
page 20.
7. For the best performance and safety, it is important
to always match the impedance of the Loudspeaker
to the Power Amplifier connections. Refer to pages
10 and 11.
Note: The impedance of a Loudspeaker actually var-
ies 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 Manufac-
turer for additional information about the actual
impedance of the Loudspeaker before connecting
it to the McIntosh MXA70.
8. Sound Intensity is measured in units called Deci-
bels and “dB” is the abbreviation.
9. When discarding the unit, comply with
local rules or regulations. Batteries
should never be thrown away or inciner-
ated but disposed of in accordance with
the local regulations concerning battery disposal.
10. For additional information on the MXA70 and
other McIntosh Products please visit the McIntosh
Web Site at www.mcintoshlabs.com.
XLR Connectors
Below is the Pin configuration for the XLR Balanced
Input Connectors on the MXA70. Refer to the diagram
for connection:
PIN 1: Shield/Ground
PIN 2: + Input
PIN 3: - Input
XLR Connectors (Digital Audio)
Below is the Pin configuration for the XLR Balanced
Digital Audio Input Connector on the MXA70. Refer
to the diagram for connection:
PIN 1: Shield/Ground
PIN 2: + Signal
PIN 3: - Signal
Note: When connecting to the MXA70 Digital XLR Input
connector it is important to use a twisted pair
shielded cable.
Power Control Connectors
The Power Control Input Jack receives Power On/
Off Signals (+12 volt/0 volt) when connected to other
McIntosh Components. The Power Control Output
Jack sends Power On/Off Signals
(+12 volt/0 volt) when connected to
other McIntosh Components. An
additional connection is for control-
ling 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 Jacks.
1. For additional connection information, refer to the
owner’s manual(s) for any component(s) connected
to the MXA70.
2. Apply AC Power to the MXA70 and other McIn-
tosh Component(s) only after all the system compo -
nents 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 MXA70 includes an Auto Off Power Save
Feature and the default setting is enabled. For
additional information including how to disable it,
refer to page 19.
4. When Power Amplifier Protection Circuitry of
the MXA70 has activated, the Front Panel Power
Guard LEDs are illuminated continuously and the
sound will be muted.
5. If the Power Transformer has overheated due to
improper ventilation and/or high ambient operat-
ing temperature, AC Power is removed from the
MXA70. Normal operation will resume when the
operating temperature is in a safe range again.
6. The Remote Control supplied with the MXA70 is
also capable of operating other McIntosh Com-
ponents. These other components may include
Preamplifiers, A/V Control Centers, Integrated
Amplifiers, Source Components and Integrated
Audio Systems. There is a chance the MXA70 and
one of these other components may both respond
to a command issued by the MXA70 Remote
Control or the Remote Control supplied with the
other component. This could affect operations such
as Volume Up/Down and Power On/Off. Many of
these other McIntosh components have the ability
to utilize what is known as “Alternate Codes” to
prevent them from responding to commands issued
Connector and Cable Information General Information
General Information, Connector and Cable Information
Power
Control
Meter
Illumination
Control Ground
PIN 1 PIN 2
PIN 3
PIN 1 PIN 2
PIN 3