Specifications

FINISH
The front panel is all glass with gold/teal nomenclature
illumination. The chassis is black.
WEIGHT
17 pounds (7.7 kg) net, 29 pounds (13.2 kg) in
shipping carton.
FRONT PANEL CONTROLS
The glass front panel contains 6 single shaft rotary
controls. At the bottom of the glass are 6 push buttons
and a HEADPHONE jack.
TONE CONTROLS
The TREBLE control can boost or cut the high
frequencies by as much as 12dB. It has 21 detent
positions. 10 for boost, 10 for cut and a center FLAT
or OFF position.
The BASS control can boost or cut the low
frequencies by as much as 12dB. It has 21 detent
positions. 10 for boost, 10 for cut and a center FLAT
or OFF position.
When either the TREBLE or BASS control is placed
in the center FLAT or OFF position all tone control circuit
elements are removed from the signal path.
INPUT SELECTOR
The 5 position switch selects the program source that
feeds the power amp and speakers.
PHONO/AUX, CD1, CD2, TUNER and VIDEO are the
input program sources.
LOUDNESS
The LOUDNESS control provides frequency response
contoured to compensate for the behavior of the human
ear at lower listening levels. At the fully counterclock-
wise position, the loudness contour is electrically flat.
As the control is turned clockwise, selected frequencies
increase in the correct proportion for proper listening
at softer volume levels. The frequency balance is not
affected by changes in the volume control settings.
First adjust the volume for the desired listening level.
Then adjust the LOUDNESS control or the preferred
compensation.
BALANCE
The BALANCE control adjusts the volume of the
channels relative to each other.
L, (left): Turning the control to the left accents the left
channel by reducing the volume of the right channel.
R, (right): Turning the control to the right accents by
right channel by reducing the volume in the left channel.
At the center detent position both channels are equal.
VOLUME
A motor driven precision VOLUME control is
provided. Left and right sections are electronically
trimmed for superior tracking over the operating range.
PUSHBUTTON SWITCHES
TAPE MONitor AND TAPE COPY
The C712 is designed to be used with two tape
recorders, either audio or video, or one of each. The
four buttons, TAPE MON 1, 2, TAPE COPY, 1 > 2, 2> 1,
control the signals in and out of the recorders.
TAPE MON 1
Depress this button to listen to a signal from the tape
recorder connected to the TAPE 1 inputs. The LED
indicator will illuminate above the button.
TAPE MON 2
Functions the same as the TAPE MON 1.
The MONITOR switches are electronically interlocked
to prevent simultaneous monitoring from two tape
recorders. They permit recordings to be monitored while
recording or copying tapes. It is possible to listen to
either recorder or a completely different program source
during the recording process.
TAPE/COPY
The 1 > 2 button connects the outputs from tape
recorder 1 to the inputs of tape recorder 2 without
affecting the program being heard from the speakers.
The 1>2 indicator will light above the button. A copy
of the program on tape recorder 1 will be made on tape
recorder 2. To monitor the original program, press the
TAPE MON 1 button. To monitor the copy, press TAPE
MON 2 button.
The 2>1 button connects the outputs from tape
recorder 2 to the inputs of tape recorder 1 without
affecting the program being heard from the speakers.
The 2>1 indicator will light above the button. A copy
of the program on tape recorder 2 will be made on tape
recorder 1. To monitor the original program, press TAPE
MON 2. To monitor the copy, press TAPE MON 1.
C712 Product Preview/Page 3
MClNTOSH LABORATORY INC., 2 CHAMBERS STREET, BlNGHAMTON, NEW YORK 13903