9
1. For Remote Power Control, connect a power control
cable from the Audio Preamplifier or A/V Con-
trol Center Power Control Output 1 to the MC462
POWER CONTROL IN Amplifier One.
Note: When a Power Control Cable is connected be-
tween the MC462 (Power Amplifier 1) and Pre-
amplifier (or A/V Control Center), the AUTO
OFF Feature is bypassed. Refer to page 13.
2. Connect a power control cable from Amplifier One
Power Control OUTput 1 to the MC462 POWER
CONTROL IN Amplifier Two.
Note: When the MC462 (Power Amplifier 2) has
Loudspeakers connected to it with a Power
Control Input, then connect the the MC462
Power Control Out 1 and Out 2 to the
Loudspeakers.
3. Connect XLR cables from the Balanced Output 1
(L&R) of an Audio Preamplifier or A/V Control
Center to the MC462 (Power Amplifier 1) Bal-
anced INput (RIGHT and LEFT). Place the INPUT
MODE Switch in the BALANCED Position.
Note: An optional hookup is to use unbalanced
cables and place the INPUT MODE Switch in
the UNBALANCED Position.
4. Connect XLR cables from the MC462 (Power
Amplifier 1) Audio Balanced OUTput (LEFT and
RIGHT) to the MC462 (Power Amplifier 2) Bal-
anced INput (RIGHT and LEFT). Place the INPUT
MODE Switch in the BALANCED Position.
5. Using a suitable tool remove the four screws from
the MC462 Rear Panel and temporarily place them
in a safe place. Refer to figure 1.
These McIntosh MC462 Stereo Power Amplifiers with
Quad Balanced Circuitry are designed for Loudspeak-
ers with an impedance of 2 ohms, 4 ohms or 8 ohms.
Connect a single Loudspeaker only to the Right and
Left Output Terminals.
Caution: Do not connect the AC Power Cord to the
MC462 Rear Panel until after the Loudspeaker
Connections are made and the protective Termi-
nal Connections Covers are installed. Failure to
observe this could result in Electric Shock.
The connection instructions below, together with the
MC462 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.
When connecting Loudspeakers to the MC462 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
6. Prepare the Loudspeaker Hookup Cable for attach-
ment to the MC462 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.
Figure 2
Figure 3
Figure 4
How to Connect for Bi-Amp
When connecting the Loudspeaker Hookup Cables to
the MC462 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.
Output Terminals
Figure A
Opening
Figure B
Figure C
Figure D
Figure E
Output Terminals and How to Connect for Bi-Amp
DISABLED
Figure 1
Remove Screws
Remove Screws
