McIntosh C27 Owner's Manual page 7

CONNECTING THE C 27 TO POWER AMPLIFIERS
Connect the MAIN OUTPUT jacks to the input of a
stereo power amplifier. The Left MAIN jack is connected
to the left amplifier input jack. The Right MAIN jack is
connected to the right amplifier input jack.
A second pair of MAIN OUTPUT jacks have been supplied
to feed a second power amplifier. In the event it is desired
to tape record after the tone filter and volume controls
the second set of MAIN OUTPUT jacks can be connected
to the tape recorder input. The controls are then all avail-
able to alter the signal before recording. Remember, any
change in the setting of the controls will change the pro-
gram to the tape recorder. Since the recording signal
available at the MAIN OUTPUT is much higher than the
output available from the TAPE 1 or TAPE 2 OUTPUT
jacks, be sure not to overload the tape recorder input. It
will not be possible to monitor from the tape recorder via
the TAPE MONITOR pushbuttons while feeding the recorder
from the MAIN OUTPUT jacks. Depressing the TAPE
MONITOR pushbutton will disconnect the program source
and may cause feedback oscillation.
Cables are supplied with the C 27 to interconnect to
the power amplifier. Longer cables can be used if needed.
The length of the cable is limited by the capacity of the
cable. The total capacity must not exceed 1,000 pF. For
instance: cables with a capacity of 25 pF per foot may be
40 feet long. 13.5 pF per foot cable may be 75 feet long.
The input impedance of the amplifiers should be 22k
ohms or greater.
CTR CHAN
Use the CenTeR CHANnel output to feed left plus right
signal to a separate power amplifier for monophonic back-
ground music or for a center channel.
CONNECTING FOR SPEAKER SWITCHING AND
HEADPHONE
When the power amplifier output is properly connected
to the rear panel FROM AMPLIFIER push connectors,
speakers in two separate areas can be turned on or off
and the C 27 front panel HEADPHONE jack will receive
the program signal.
Connect a wire from the proper impedance output
connection on the power amplifier to the FROM AMPLIFIER
push connectors on the C 27 rear panel. Connect the first
pair of speakers to the rear panel SPEAKER 1 push con-
nectors and a second pair of speakers to the SPEAKER 2
push connectors. When connecting the speakers and power
amplifier it is important to connect the power amplifier
output impedance tap for the parallel impedance com-
bination of the two speaker systems used. The front panel
SPEAKER switch permits routing program to either
SPEAKER 1, SPEAKER 2, both 1 and 2, or OFF. In the
SPEAKER OFF position, the program is fed only to the
HEADPHONE jack for private listening.
AC OUTLETS
There are 4 black AC outlets and one red AC outlet. The
power to the black AC outlets is controlled by the front
panel AC power switch. Use these outlets for a tuner, tape
recorder, etc. The total capacity of all AC power outlets is
600 watts. The red receptacle is on at all times to feed
AC power to a turntable so that it can be turned on or off
with its own AC switch.
FUSE
A 0.5 AMP fuse protects the preamplifier circuits. The
fuse does not protect additional equipment connected to
the back panel AC outlets.
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