McIntosh MC611, Owner'S Manual

Page: 9 / 20

9
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
6. 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, care-
fully twist the
strands together
as tightly as pos-
sible.
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.
How to Connect for Bi-Amp
1. For Remote Power Control, connect a power control
cable from the Audio Preamplifier or A/V Proces-
sor Power Control Trig 1 Output to Amplifier One
POWER CONTROL IN.
2. Connect a power control cable from Amplifier One
Power Control OUTput 1 to Amplifier Two POW-
ER CONTROL IN.
3. Connect XLR cables from the Balanced Output 1
Right Channel (refer to note 2 below) of an Audio
Preamplifier or A/V Processor to Amplifier BAL-
anced INput. Place the INPUT MODE Switch in
the BALanced Position.
Notes: 1. An optional hookup is to use an unbalanced
cable and place the INPUT MODE Switch in
the UNBALanced Position.
2. When multiple MC611s are used in a Stereo
or Multichannel System, match up the
Preamplifier or A/V Processor Channel
Output designation to each MC611 with
Loudspeaker and the Loudspeaker location
in the room.
4. Connect XLR cables from Amplifier One Audio
BALanced OUTput to Amplifier Two BALanced
INput.
5. 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.
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:
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 “ Mc1B ”, 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
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 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 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 figure E.
Figure A
Opening
Figure B
Figure C Figure D
Figure E
Output Terminals
Figure 1
Remove Screws