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7
When connecting Loudspeakers to the MC611 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
2 Ohms
12AWG 10AWG 8AWG
4 Ohms
14AWG 12AWG 10AWG
8 Ohms
16AWG 14AWG 12AWG
4. Prepare the Loudspeaker Hookup Cable for attach-
ment to the MC611 Power Amplifier:
Bare wire cable ends:
Carefully remove sufficient insulation from the
cable ends, refer to figures 2, 3 & 4. 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.
Banana Plugs are for use in the United States and
Canada only:
5. Locate the Terminal Connections Cover from the
inside of the MC611 shipping carton. Insert the
just prepared Loudspeaker hookup cables thru the
How to Connect
1. For Remote Power Control, connect a power control
cable from the Audio Preamplifier or A/V Control
Center Power Control Output 1 to the Amplifier
POWER CONTROL IN.
2. Connect XLR cables from the Balanced Output 1
Right Channel, (refer to note 2 below) of an Audio
Preamplifier or A/V Processor to the Amplifier
BALanced INput. Place the INPUT MODE Switch
in the BALANCED Position.
Notes: 1. An optional hookup is to use an unbal-
anced cable and place the INPUT MODE
Switch in the UNBALanced Position.
2. When multiple MC611s are used in a Ste-
reo or Multichannel System, match up the
Preamplifier or A/V Processor Channel
Output designation to each MC611 with
Loudspeaker and the Loudspeaker loca-
tion in the room.
3. Using a suitable tool remove the two screws from
the MC611 Rear Panel and temporarily place them
in a safe place. Refer to figure 1.
This McIntosh MC611 Quad Balanced Power Ampli-
fier is designed for Loudspeakers with an impedance
of 2 ohms, 4 ohms or 8 ohms. Connect a single Loud-
speaker only to the Output Terminals.
Caution: Do not connect the AC Power Cord to the
MC611 Rear Panel until after the Loudspeaker
Connections are made and the protective Termi-
nal Connections Cover is installed. Failure to
observe this could result in Electric Shock.
The connection instructions below, together with the
MC611 Connection Diagram located on the separate
folded sheet “Mc1A”, 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 additional information refer to “Connec-
tor and Cable Information” on page 3.
Figure 2
Figure 3 Figure 4
Figure 1
Remove Screws
Output Terminals
When connecting the Loudspeaker Hookup Cables to
the MC611 Power Amplifier Output Terminals please
follow the steps below:
1. Rotate the top of the Output Terminal Post coun-
terclockwise until an opening
appears. Refer to gures 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
gure C.
3. Rotate the top of the Output
Terminal Post clockwise until it
is nger tight. Refer to gure D.
4. Place the supplied McIntosh
Wrench over the top of the Out-
put Terminal and rotate it one
quarter of a turn (90° ) to secure
the Loudspeaker Cable Connec-
tion. Do not over tighten. Refer
to gure E.
Figure A
Opening
Figure B
Figure C Figure D
Figure E
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