McIntosh MC 2100, Руководство пользователя

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INSTALLATION
Adequate ventilation extends the trouble-free
life of electronic instruments. It is generally found
that each 10° centigrade (18° F) rise in tempera-
ture reduces the life of electrical insulation by one
half. Adequate ventilation is an inexpensive and
effective means of preventing insulation break-
down that results from unnecessarily high operat-
ing temperatures. The direct benefit of adequate
ventilation is longer, trouble-free life.
The suggested minimum space for mounting the
MC2100 is 20 inches deep x 9½ inches high x 12
inches wide. Always allow for air flow by either
ventilation holes or space next to the bottom of
the amplifier and a means for the warm air to
escape at the top.
It is recommended that the MC2100 be mounted
in a normal or horizontal position. However with
adequate ventilation, the amplifier can be mounted
in any position except upside down. If the ampli-
fier is to be installed on a vertical surface it is
recommended that the autoformers be on the
down side. This position permits greater air flow
around the transistors and component parts there-
by extending the trouble-free life of the amplifier.
HOW TO CONNECT
INPUT-STEREO
The shielded cable from the left output of the
Mclntosh preamplifier is plugged into the left jack. The
shielded cable from the right output of the Mclntosh
preamplifier is plugged into the right jack. The INPUT
switch must be in the STEREO position and the OUT-
PUT properly connected to the stereo loudspeakers
or distortion and loss of power may result.
INPUT-MONO
The shielded cable from the program source is
plugged into the right jack. The INPUT switch must
be in the MONO position and the OUTPUT properly
connected for mono loudspeaker operation or distor-
tion and loss of power may result.
OUTPUT-STEREO OR TWIN AMPLIFIERS
For stereo or twin channel operation it is not nec-
essary to use the same impedance loudspeaker on
each output. Simply connect each channel for the
impedance desired.
SPEAKERS
Speakers are connected at the barrier strips marked
OUTPUT on the sloped panel of the amplifier. Use
lamp cord, bell wire, or wire with similar type of insula-
tion to connect the speakers to the amplifier. For the
normally short distances of under 50 feet between the
amplifier and speaker, #18 wire or larger can be
used. For distances over 50 feet between the amplifier
and speaker use larger wire.
The loudspeaker impedance is usually identified on
the loudspeaker itself. Connect one of the leads from
the left loudspeaker to the screw marked COM on the
LEFT OUTPUT barrier strip. Connect the other lead
from the left loudspeaker to the screw marked with the
number corresponding to the speaker impedance on
the LEFT OUTPUT barrier strip. Connect one of the
leads from the right loudspeaker to the screw marked
COM on the RIGHT OUTPUT barrier strip. Connect the
other lead from the right loudspeaker to the screw
marked with the number corresponding to the speaker
impedance on the RIGHT OUTPUT barrier strip.
The only adverse effect on the operation of a
Mclntosh amplifier when it is improperly matched is a
reduction in the amount of distortion-free power avail-
able to the loudspeaker. Close impedance matching is
desirable for maximum distortion-free power.
SPEAKER CONNECTIONS
Use this table to determine proper speaker connec-
tion:
Connect the
If the speaker impedance speaker leads
is between: between COM and:
3.2 to 6.5 ohms 4 ohms
6.5 to 13 ohms 8 ohms
13 to 26 ohms 16 ohms
STEREO OUTPUT-CONNECTING TO BARRIER STRIPS
Use this table for stereo connections using the
barrier strips:
Connect one right
Connect one left speaker lead to
speaker to screw the screw marked
If the speaker LEFT-COM and RIGHT-COM and
impedance is: other to: the other to:
4 ohms LEFT-4 RIGHT-4
8 ohms LEFT-8 RIGHT-8
16 ohms LEFT-16 RIGHT-16
For 25 volt line operation connect one of the left leads
to the screw marked COM on the LEFT OUTPUT
barrier strip. The other left lead is connected to the
screw marked 8 on the LEFT OUTPUT barrier strip.
Connect the right leads in the same manner on the
RIGHT OUTPUT barrier strip.
When connected as above the MC 2100 operates as a
105 watt per channel stereo amplifier.
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