7
4. Prepare the Loudspeaker Hookup Cable for
attachment to the MI347 Power Amplifier:
Bare wire cable ends:
Carefully remove sufficient insulation from the
cable ends, refer to figures 1, 2 & 3. 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.
Banana Plugs are for use in the United States and
Canada only:
1. Attach the previously prepared bare wire cable
ends into the banana plugs and secure the
connections. Refer to figure 4.
2. Referring to figure 5, connect the
Loudspeaker hookup cables with
banana plugs into the hole at the end
of the MI347 Negative and Positive
Output Terminals, making sure to
match up channel designation with
Loudspeaker location.
WARNING: Loudspeaker terminals
are hazardous live and
present a risk of electric
shock. For additional instruction on
making Loudspeaker Connections
contact your McIntosh Dealer or
McIntosh Technical Support.
3. Connect the MI347 power cord to an active AC
outlet.
How to Connect for Multi Channel System
1. For Remote Power Control, connect a power control
cable from the A/V Control Center Power Control
Trigger/Output 1 to the Amplifier PWR CNTRL
Power Control INput.
Note: When the Power Control Cable is connected
between the MI347 and an A/V Control Center,
the AUTO OFF Signal Sensing Circuitry is
automatically disabled.
2. Connect XLR cables from the Balanced Outputs
(LF, C, RF, LB, LS, RS, RB) of an A/V Control
Center to the MI347 BALanced INPUTS
(CHANNELs- 1/LF, 2/C, 3/RF, 4/LB, 5/LS, 6/
RS, 7/RB ) making sure to match up channel
designations.
Note: The MI347 UNBALanced Inputs may be used
in place of the Balanced Inputs when the
A/V Control Center has Unbalanced Output
Connections instead of Balanced Connections.
This McIntosh MI347 Power Amplifier is designed
for Loudspeakers with an impedance of 4 ohms or
8 ohms. Connect a single Loudspeaker only to each
Channel Output Terminals.
When connecting Loudspeakers to the MI347 it
is very important to use cables of adequate size, so
there is little to no power loss in the cables. The size is
specified in Gauge Numbers or AWG (American Wire
Gauge). The smaller the Gauge number, the larger the
wire size:
Loudspeaker Cable Distance vs Wire Gauge Guide
Loudspeaker
Impedance
25 feet
(7.62 meters)
or less
50 feet
(15.24 meters)
or less
100 feet
(30.48 meters)
or less
4 Ohms
14AWG
12AWG
10AWG
8 Ohms
16AWG
14AWG
12AWG
Caution: Do not connect the AC Power Cord to the
MI347 Rear Panel until after the Loudspeaker
Connections are made. Failure to observe this
could result in Electric Shock.
The connection instructions below, together with
the MI347 Connection Diagram located on the
separate folded sheet “
Mc1A
”, is an example of a
typical Multichannel System. Your system may
vary from this, however the actual components
would be connected in a similar manner. For
additional information refer to “Connector and Cable
Information” on page 3.
Figure 1
Figure 2
Figure 3
Figure 5
Figure 4
Output Terminals
When connecting the Loudspeaker Hookup Cables to
the MI347 Amplifier Output Terminals please follow
the steps below:
1. Rotate the top of the Output Terminal Post
counterclockwise until an
opening appears. Refer to
figures A and 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
figure C.
3. Rotate the top of the Output
Terminal Post clockwise until it
is finger tight. Refer to figure D.
4. Place the supplied McIntosh
Wrench over the top of the
Output Terminal and rotate it
one quarter of a turn (90°) to
secure the Loudspeaker Cable
Connection.
Do not over
tighten.
Refer to figure E.
Figure A
Opening
Figure B
Figure C
Figure D
Figure E
How to Connect for a Multi Channel System
