General Information; Connector And Cable Information - McIntosh C2500 Owner's Manual

General Information

1. The C2500 uses Vacuum Tubes for amplifying the
audio signal. The C2500 is designed to have only
qualified Service Personnel perform any part(s)
replacement including all the vacuum tubes.
2. For additional connection information, refer to the
owner's manual(s) for any component(s) connected
to the C2500 Tube Preamplifier.
3. The Main AC Power going to the C2500 and any
other McIntosh Component(s) should not be applied
until all the system components are connected
together. Failure to do so could result in malfunc-
tioning of some or all of the system's normal opera-
tions. When the C2500 and other McIntosh Com-
ponents are in their Standby Power Off Mode, the
Microprocessor's Circuitry inside each component
is active and communication is occurring between
them.
4. The C2500 includes an Auto Off Power Save
Feature and the default setting is enabled. For
additional information including how to disable it,
refer to page 16.
5. Balanced and Unbalanced Inputs and Outputs can
be mixed. For example, you may connect signal
sources to Unbalanced Inputs and send signals
from the Balanced Outputs. You can also use Bal-
anced and Unbalanced Outputs simultaneously,
connected to different Power Amplifiers.
6. The IR Input, with a 1/8 inch mini phone jack, is
configured for non-McIntosh IR sensors such as
a Xantech Model HL85BK Kit. Use a Connection
Block such as a Xantech Model ZC21 when two
or more IR sensors need to be connected to the
C2500. When an external sensor is connected to
the C2500 the Front Panel sensor is disabled to
avoid possible interaction.
7. The C2500 internal Digital to Analog Converter
Circuitry is designed to decode 2-channel PCM
4
(Pulse Code Modulation) Digital Signal present
at the Coaxial and Optical Digital Audio Inputs.
Other Digital Audio Signal Format Types will
cause the Audio Outputs of the C2500 to be muted
and the Front Panel Information Display will indi-
cate an error message.
8. The Remote Control Supplied with the C2500
Preamplifier is capable of operating other com-
ponents. For additional information go to www.
mcintoshlabs.com.
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 regula-
tions concerning battery disposal.
10. For additional information on the C2500
and other McIntosh Products please visit the Mc-
Intosh Web Site at www.mcintoshlabs.com.

Connector and Cable Information

XLR Connectors
Below is the Pin configuration for the XLR Balanced
Input and Output Connectors on the C2500. Refer to
the diagrams for connections:
PIN 1: Shield/Ground
PIN 2: + Output
PIN 3: - Output
PIN 2
PIN 3
Power Control and Trigger Connectors
The C2500 Power Control Out, Trigger and Pass-Thru
Output Jacks send Power On/Off Signals (+12 volt/0
General Information and Connector Information
volt) when connected to other
McIntosh Components. An
additional connection is for
controlling the illumination
of the Power Output Meters
on McIntosh Power Ampli-
fiers. A 3.5mm stereo mini
phone plug is used for con-
nection to the Power Control,
Trigger and Pass-Thru Outputs on the C2500.
Data Port Connectors
The C2500 Data Out Ports send Remote Control Sig-
nals to Source Components. A
3.5mm stereo mini phone plug is
used for connection.
RS232 DB9 Connector Pin Layout
1. N/C
2. Data Out (TXD)
3. Data In (RXD)
4. N/C
5. Gnd.
PIN 1 PIN 2
PIN 1
PIN 3
Main, Output 1&2,
Trig 1&2
and Pass-Thru
Power
Control
Meter
Illumination
Control
Ground
Data
Signal
N/C
Data
Ground
6. N/C
7. N/C
8. N/C
9. N/C