McIntosh C34V Owner's Manual page 11

fects the program selected by the RECORD selector.
These jacks are used to add a noise reduction or
any audio signal processing device. Be sure to
match the left to left and right to right channels
when connecting external processors.
The EXTERNAL PROCESSOR jacks have switching
contacts which allow the signal to pass through
them when there is nothing plugged into the jacks,
When an external processor is used, the program is
routed to the external processor from the EXTER-
NAL PROCESSOR TO jack and back by the EXTER-
NAL PROCESSOR FROM jack.
WHEN AN EXTERNAL PROCESSOR IS USED, IT
MUST BE TURNED ON FOR THE PROGRAM TO
BE HEARD THROUGH THE SYSTEM.
9. AUDIO OUTPUT:
The third field of connectors are marked AUDIO
OUTPUT. Three sets of jacks (VCR 1/TAPE 1,
VCR 2/TAPE 2, and TAPE 3) connect the program
selected by the RECORD input selector. The MAIN
set of jacks connect the program selected by the
LISTEN input selector and connect to the power
amplifier. Output to the two sets of jacks (SWITCH-
ED 1 and SWITCHED 2) controlled by the front panel
SPEAKER/OUTPUT 1 and 2 pushbuttons can be con-
nected to additional power amplifiers for remote
area listening.
The Left MAIN jack is to be connected to the
amplifier left input jack. The Right MAIN jack is to
be connected to the amplifier right input jack.
Two additional stereo power amplifiers may be
connected in the same fashion to the SWITCHED
OUTPUT jacks. Audio output signal is supplied to
these jacks only when the front panel pushbutton
SPEAKER/OUTPUT 1 and/or 2 pushbuttons are
pressed in. This arrangement is useful to turn the
program on or off to its separate amplifiers and
loudspeakers.
10. MONITOR AMPLIFIER:
The MONITOR AMPLIFIER provides power to
headphones. It may also be used to drive speakers.
The MONITOR AMPLIFIER will furnish 20 watts per
channel across 8 ohms or 12.6 volts RMS to a 600
ohm line. For operation, see MONITOR AMPLIFIER
page 13.
The input to the MONITOR AMPLIFIER can be
selected from either the RECORD program, the
LISTEN program, or from a third source connected
to the EXTernal INPUT jacks on the rear panel. The
input selector switch is on the top panel of the C 34V.
HOW TO CONNECT 9
The EXTernal INPUT May be used for program
sources not originating in the C 34V. One use could
be to connect the output of a time delay device for
back channel speakers.
The output of the MONITOR AMPLIFIER is fed to
the front panel HEADPHONE phone jacks, to the
red and black posicontact push connectors and to
the jacks marked OUTPUT. Connect the left
speaker lead to the black COMmon push connector
and the red L terminal. Connect the right speaker
lead to the black COMmon push connector and the
red R terminal.
The OUTPUT jacks can be connected to drive a
low impedance (8 to 600 W) unbalanced line.
11. GROUND:
The ground (GND) post on the rear panel is pro-
vided primarily for a turntable or record changer
that has a separate ground lead in addition to the
signal leads.
12. AC POWER:
Plug the preamplifier AC power cord into a 120
volt 60 Hz wall outlet. The plug blades are polariz-
ed so be certain the plug is fully inserted in the
outlet to prevent blade exposure.
CAUTION: TO PREVENT ELECTRIC SHOCK, DO
NOT USE THE (POLARIZED) PLUG ON THIS UNIT
WITH AN EXTENSION CORD, RECEPTACLE, OR
OTHER OUTLET UNLESS THE BLADES CAN BE
FULLY INSERTED TO PREVENT BLADE EXPOSURE.
Three types of AC power outlets are provided on
the back panel of the C 34V. Three are black, two
are red, and one is green.
The black outlets are switched on or off when the
C 34V is turned on and off. Use these to provide AC
power to amplifiers, CD players, or other accessories.
The power capacity of all the outlets, totalled, is 1440
watts. The green outlet has a maximum capacity of
100 watts. For power consumption above 1440 watts,
it is necessary to add a Mclntosh SCR 2 (SPEAKER
CONTROL RELAY). The SCR 2 has two AC power
outlets that provide additional capacity of 1800 watts
switched on or off by the C 34V. Use these outlets to
supply AC power to amplifiers or other components
whenever the total load to be switched exceeds the
C 34V rating of 1440 watts.
The red outlets are on at all times and are used
with accessories that have their own power switches.
For example, a VCR should be plugged into one of
these outlets for it to be able to record TV programs
when the main audio system is turned off.