Specifications

separation—noise reduction control circuit. When
listening to weak or distant FM stations, optimum
stereo separation and signal to noise ratio is
automatically provided.
UNIQUE AM TUNER SECTION
The AM circuit in the MX 117 is unique in design
for a superheterodyne tuner. The AM RF amplifier
circuit has constant selectivity, constant sensitivity
and high image rejection across the complete AM
band. In addition there is no loss of audio frequency
response at the low end of the band. It is the only AM
circuit that has all these features simultaneously.
These advanced AM performance characteristics
bring about a re-discovery of AM listening.
PERFORMANCE LIMITS and RATINGS
PREAMPLIFIER SECTION
FREQUENCY RESPONSE;
+ 0 - 0.5 db from 20 Hz to 20 kHz
RATED OUT PUT LEVELS:
Main Out 2.5V
Line Out 1.25V
Headphone 750mV
Tape Out 250mV
DISTORTION:
0.02% maximum at 2.5V output from
20 Hz to 20 kHz
INPUT SENSITIVITY AND GAIN:
Input to Main Out
Phone 1 and 2 2.2mV in for 2.5V out
(61.1 dB gain at 1 kHz)
Aux, Tape 1 and 2 250mV in for 2.5V out
(20 dB gain at 1 kHz)
Input to Line Out
Phono 1 and 2 2.2mV in for 1.25V out
(55 dB gain at 1 kHz)
Aux, Tape 1 and 2 250mV in for 1.25V out
(14 dB gain at 1 kHz)
Input to Headphone Out
Phono 1 and 2 2.2mV in for 750mV out
(50.7 dB gain at 1 kHz)
Aux, Tape 1 and 2 250mV in for 750mV out
(9.5 dB gain at 1 kHz)
Input to Tape Out
Phono 1 and 2 2.2mV in for 250mV out
(41.1 dB gain at 1 kHz)
Aux, Tape 1 and 2 250mV in for 250mV out
(0 dB gain at 1 kHz)
SIGNAL TO NOISE:
Phono 1 and 2 -90 dB IHF A-weighted,
below 10mV input
-80 dB unweighted,
below 10mV input
Aux, Tape 1 and 2 - 100 dB IHF
A-weighted, below 250mV
input -90 dB
unweighted, below
250mV input
INPUT IMPEDANCE:
Phono 1 and 2 47kW and 50pF
Aux, Tape 1 and 2 47kW
OUTPUT IMPEDANCE:
Main Out less than 100S7 (to
operate into 5kW or
greater)
Line Out 600(2 (to operate into a
600W line)
Headphone 8W
Tape Out less than 200W (to
operate into 5kW or
greater)
EQUALIZER CONTROL RESPONSE:
Center Frequencies 30, 750, and 10 kHz
Boost and Cut ±12 dB
AM SECTION
SENSITIVITY:
75mV IHF with external antenna
SIGNAL TO NOISE RATIO:
45 dB minimum IHF or 55 dB at 100%
modulation
FREQUENCY RESPONSE:
+ 0 -6 dB from 20 Hz to 3500 Hz
HARMONIC DISTORTION:
0.8% maximum at 30% modulation
ADJACENT CHANNEL SENSITIVITY:
30 dB minimum IHF
IMAGE REJECTION:
65 dB minimum from 540 kHz to 1600 kHz
FM SECTION
USABLE SENSITIVITY:
2mV (11.2dBf) IHF
QUIETING SENSITIVITY:
5mV (19.1dBf) IHF -50 dB (Mono)
50mV (39.5dBf) IHF -50 dB (Stereo)
SIGNAL TO NOISE RATIO:
70 dB IHF minimum both Mono and Stereo
HARMONIC DISTORTION:
0.18% (Mono) IHF maximum
0.38% (Stereo) IHF maximum
ALTERNATE CHANNEL SELECTIVITY:
75 dB IHF minimum
IMAGE REJECTION:
100 dB IHF minimum
STEREO SEPARATION:
45 dB minimum at 1 kHz
GENERAL INFORMATION
POWER REQUIREMENT:
120 Volts 50/60 Hz, 45 Watts
SEMI CONDUCTOR COMPLEMENT:
24 Bipolar Transistors
18 Field Effect Transistors
62 Diodes
24 Integrated Circuits
MECHANICAL INFORMATION
SIZE:
Front panel measures 16 inches wide (40.6 cm) by
5 7/16 inches high (13.8 cm). Chassis measures 14
3/4 inches wide (37.5 cm) by 4 13/16 inches high
(12.2 cm) by 13 inches deep (33 cm), including con-
nectors. Knob clearance required is 1 1/4 inches
(3.2 cm) in front of mounting panel.
FINISH:
Front panel is anodized gold and black with
special gold/teal nomenclature illumination.
Chassis is black.
MOUNTING:
Mclntosh developed professional PANLOC.
WEIGHT:
24 pounds (10.9 kg) net, 36 pounds (16.3 kg) in
shipping carton.
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