Specifications

PRECISION VOLUME CONTROL
Left and Right sections of the volume control are
trimmed for superior tracking.
DOUBLE SHIELDED POWER TRANSFORMER
Copper and steel shielding eliminate hum pickup from
the power transformer.
ELECTRONICALLY REGULATED POWER SUPPLY
Regulators maintain stable operation even during
"Brown Outs" or low line voltage.
AUTO MUTING
The outputs are muted for 2 seconds during power
up to prevent hearing annoying clicks and pops
generated by other equipment.
EXTRA SWITCHED OUTPUTS
Extra switched audio outputs are provided to feed
additional amplifiers for remote areas.
HEADPHONE JACK
A HEADPHONE JACK and amplifier are provided for
private listening.
BALANCED INPUTS AND OUTPUTS
XLR connectors are provided for balanced audio inputs
and outputs.
COMPANDOR SYSTEM
The Mclntosh COMPANDOR System can be used to
control the dynamic range of program material. It can
be used in two different ways: to function as an
expander or as a compressor. Expansion can restore
the dynamic range of records tapes or broadcast music.
Compression decreases dynamic range. It can be used
for making tape recordings or for listening to background
music. The Compandor can be switched to either the
RECORD or LISTEN lines, by means of the REC
COMPAND pushbutton.
MONITOR AMPLIFIER
The MONITOR AMPLIFIER provides power to
headphones or speakers. It will furnish 20 watts per
channel across 8 ohms.
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 rear panel of the C40.
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 C40 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.
PREAMP SECTION
FREQUENCY RESPONSE
+ 0, -0.25dB from 20Hz to 20,000Hz
RATED OUTPUT
2.5V at MAIN and SWITCHED 1 and 2 Outputs.
2.5V at BALANCED Output.
OUTPUT IMPEDANCE
Main and switched 600 ohms unbalanced. Balanced
600 ohms.
MAXIMUM VOLTAGE OUTPUT
Main, switched 1 and 2 and balanced, 8V from 20Hz
to 20,000Hz.
TOTAL HARMONIC DISTORTION
0.002% maximum from 20Hz to 20,000Hz at rate
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.
MCINTOSH LABORATORY INC., 2 CHAMBERS STREET, BlNGHAMTON, NEW YORK 13903
C40 Product Preview Page 2