12
Caution: Do not connect the AC Power Cord to the
MC275 Right Side Panel until after the Loud-
speaker Connections are made. Failure to
observe this could result in Electric Shock.
The following information is applicable to audio sys-
tems using more than one MC275. This would include
a stereo system where one MC275 Power Amplifiers
operating in Mono Mode for the Right Channel and
another MC275 for the Left Channel.
The following connection instructions, together
with the MC275 Connection Diagram located on the
separate folded sheet “Mc1B”, illustrates the con-
nections for the Left Channel. The connections also
applies to a second MC275 Power Amplifier for the
Right Channel.
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 7.
1. For Remote Power Control, connect a power control
cable from the Audio Preamplifier Power Control
Main Output Jack to the first MC275 Power Ampli-
fier POWER CONTROL IN Jack.
2. Connect a second Power Control Cable from the
POWER CONTROL Output of the first MC275
to the second MC275 Power Amplifier POWER
CONTROL IN Jack.
3. Connect an XLR cable from the Balanced Main
Output Left Channel connector of the Audio
Preamplifier to the first MC275 Power Amplifier
BALanced INPUT R/MONO. Place the INPUT
Switch in the BALANCED position and the MODE
Switch in the MONO 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 MC275s are used in a
Stereo System, match up the Preampli-
fier Channel Output designation to each
MC275 with the Loudspeaker location in
the room.
4. Connect an XLR cable from the Balanced Main
Output Right Channel connector of the Audio Pre-
amplifier to the second MC275 Power Amplifier
BALanced INPUT R/MONO.
The McIntosh MC275 Power Amplifier in MONO
Mode is designed for Loudspeakers with an imped-
ance of 2 ohms, 4 ohms or 8 ohms. Connect a single
Loudspeaker only to the Output Terminals.
When connecting Loudspeakers to the MC275 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 12 AWG 10AWG
8 Ohms
16AWG 14AWG 12 AWG
5. Prepare the Loudspeaker Hookup Cables for attach-
ment to the MC275 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.
3. Banana plugs are for use in the United
States and Canada only.
How to Connect for Monaural Operation
Output Terminals
When connecting the Loudspeaker Hookup Cables to
the MC275 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
To Next Page
Loading...
Need help?
General
