Specifications

PRECISION VOLUME CONTROL
Left and Right sections for the volume control are
trimmed for superior tracking.
DOUBLE SHIELDED POWER TRANSFORMER
Copper and steel shielding eliminate hum pickup from
the power transformer.
REMOTE POWER ON AND MUTE INDICATION
On each keypad and remote sensor there is an LED
that lights when that area is POWERED and blinks on
and off when the area is MUTED.
ELECTRONICALLY REGULATED POWER SUPPLY
Regulators maintain stable operation even during
"Brown Outs" or low line voltage.
AUTO MUTING
The outputs are muted for 1 second during power
up to prevent hearing annoying clicks and pops
generated by other equipment.
NEW REMOTE SENSOR POWER SUPPLY
The design of the remote sensor power supply has
been changed to provide power to operate up to four
sensors or keypads wired in parallel on the same coax.
HEADPHONE JACK
A HEADPHONE JACK and amplifier are provided for
private listening.
PARALLEL DATA OUTPUTS
Two parallel data output connectors for Mclntosh CD
player and CD changer control plus a connector for tuner
control.
PERFORMANCE SPECIFICATIONS
PERFORMANCE LIMITS
Performance limits are the maximum deviation from
perfection permitted for a Mclntosh instrument. We
promise you that when you purchase a new C712 from
a Mclntosh franchised dealer, it will be capable of or
can be made capable of performance at or exceeding
these limits or you can return the unit and get your
money back.
FREQUENCY RESPONSE
+ 0, -0.5dB from 20Hz to 20,000Hz
RATED OUTPUT
2.5V at MAIN and BALANCED Outputs.
OUTPUT IMPEDANCE
Main 600 ohms
Balanced 600 ohms
MAXIMUM VOLTAGE OUTPUT
Main and Switched 1 and 2 outputs, 8V from 20Hz
to 20,000Hz.
TOTAL HARMONIC DISTORTION
0.002% maximum from 20Hz to 20,000Hz at rated
output.
SENSITIVITY
Phono: 2.5mV for 2.5V rated output, (0.5mV IHF).
High Level: 250mV for 2.5V rated output (50mV
IHF).
SIGNAL TO NOISE RATIO, A-WEIGHTED
Phono: 90dB below 10mV input, (84dB IHF).
High Level: 105dB below rated output (95dB IHF).
MAXIMUM INPUT SIGNAL
Phono: 90mV.
High Level: 10V.
INPUT IMPEDANCE
Phono: 47K ohm and 65pF capacitance.
High Level: 22K ohms
VOLTAGE GAIN
Phono to Tape: 40dB.
Phono to Main: 60dB.
High Level to Tape: 0dB.
High Level to Main: 20dB.
TONE CONTROLS
Bass and Treble variable 12dB boost to 12dB cut.
AC POWER OUTPUTS
1 Switched, and 1 unswitched.
POWER REQUIREMENTS
120 Volts, 50/60Hz, 15 watts.
MECHANICAL INFORMATION
SIZE
Front panel measures 16-1/8 inches wide (41 cm)
by 3-9/16 inches high (9 cm). Depth is 17.5 inches
(44.5 cm) including connectors. Knob clearance
required in front of the mounting panel is 1 -3/8 inches
(3.5 cm).
MCINTOSH LABORATORY INC., 2 CHAMBERS STREET, BlNGHAMTON, NEW YORK 13903
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