Owner's Manual

10
Caution: Do not connect the AC Power Cord to the
MXA70 Rear Panel until after the Loudspeaker
Connections are made. Failure to observe this
could result in Electric Shock.
Warning: Loudspeaker terminals are hazardous live and
present a risk of electric shock. For additional
instruction on making Loudspeaker Connec-
tions contact your McIntosh Dealer or McIn-
tosh Technical Support.
The McIntosh MXA70 Power Amplifier Circuitry is
designed for a single 8 ohms Loudspeaker connected
to the Right and Left Output Terminals.
The recommended cable size is shown below:
Cable Distance vs American Wire Gauge (Size)
Loudspeaker
Impedance
25 feet
(7.62 meters)
or less
50 feet
(15.24 meters)
or less
100 feet
(30.48 meters)
or less
8 Ohms
16AWG 14AWG 12AWG
1. Prepare the Loudspeaker Hookup Cable for attach-
ment to the MXA70:
Bare wire cable ends:
Carefully remove sufficient insulation from
the cable ends, refer to figures F, G & H. If the
cable is stranded,
carefully twist the
strands together as
tightly as possible.
Notes: 1. If desired, the twisted ends can be tinned
with solder to keep the strands together.
2. The prepared bare wire cable ends may be
inserted into spade lug connectors.
3. Banana plugs are for use in the United
States and Canada only.
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2. Attach the previously prepared bare wire cable ends
into the banana plugs and secure the connections.
Refer to figure I.
Connecting Components
The MXA70 has the ability to automatically switch
power On/Off to McIntosh Source Components via
the Power Control connection.
The connection instructions below, together with
the MXA70 Connection Diagram on the next page is
an example of a typical audio system. Your system
may vary from this, however the actual components
would be connected in a similar manner. For addition-
al information refer to “Connector and Cable Informa-
tion” on page 4.
Note: When the MXA70 is being added to an existing
Audio (or Audio/Video) System, please proceed to
page 12. If the MXA70 will be used with an external
Power Amplifier, please refer to page 13.
Power Control Connections:
1. Connect a Control Cable from the MXA70 PWR
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Control In on the Tuner.
2. Connect a Control Cable from the Tuner Power
Control Out Jack to the Disc Player Power Control
In Jack.
3. Connect any additional McIntosh Components in
a similar manner, as outlined in steps 1 thru 2.
Audio Connections:
4. Connect the Audio Cable from the MXA70 UN-
BAL 1 L & R jacks to the Disc Player Fixed Audio
Output Jacks.
Note: The Balanced Input may be used instead of the
UNBAL Unbalanced Inputs.
5. Connect any additional Components in a similar
manner, as outlined in step 4.
Optional Digital Audio Connections:
6. Connect an Coaxial Cable from the MXA70 DIGI-
TAL AUDIO INPUT COAX connector to the
Digital Audio Out Optical Connector on the Tuner.
Note: The OPTICAL Input (on the MXA70 and on the
Tuner) may be used instead of the Coaxial Con-
nections.
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nectors from the MXA70 USB Input to an avail-
able USB connector on a Computer.
Output Terminals
When connecting the Loudspeaker Hookup Cables to
the MXA70 Output Terminals please follow the steps
below:
1. Rotate the top of the Output Terminal Post coun-
terclockwise until an opening
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B.
2. Insert the Loudspeaker hookup
cable into the Output Terminal
Post opening or the cable spade
lug around the center post of
the Output Terminal. Refer to
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3. Rotate the top of the Output
Terminal Post clockwise until it
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4. Place the supplied McIntosh
Wrench over the top of the Out-
put Terminal and rotate it one
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the Loudspeaker Cable Connec-
tion. Do not over tighten. Refer
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Figure A
Opening
Figure B
Figure C
Figure D
Figure E
Optional Loudspeaker Connections
Figure F
Figure G
Figure H
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5. The supplied Loudspeaker Connecting Cables are
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tween the MXA70 Electronic Chassis Output Ter-
minals to the Input Terminals on the Loudspeak-
ers, being careful to observe the correct polarities.
Note: If the long cables are need, proceed to “Op-
tional Loudspeaker Connections”.