Performance Limits
Performance limits are the maximum deviation from
perfection permitted for a Mclntosh instrument. We
promise you that when you purchase a new MR 75
from a Mclntosh Franchised dealer it will be capable
of performance at or exceeding these limits or you
can return the unit and get your money back.
Mclntosh is the only manufacturer that makes this
statement.
FM SECTION
Tuning
88 to 108 MHz
Antenna Inputs
One 300ft balanced and one 75 unbalanced.
Intermediate Frequency
10.7 MHz
Usable Sensitivity
2µM (11.2dBf) IHF
Quieting Sensitivity
5µV (19.1dBf) IHF - 5 0 dB (Mono)
50µV (39.5dBf) IHF - 5 0 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
Audio Frequency Response
20 Hz to 15 kHz + 0 , - 1 dB
Capture Ratio
1.8 dB
Spurious Rejection
100 dB IHF minimum
SCA Rejection
60 dB minimum
AM SECTION
Sensitivity
75µV 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 Selectivity
30 dB minimum IHF
Image Rejection
65 dB minimum from 550 kHz to 1600 kH
GENERAL INFORMATION
Audio Output
Variable: 2.5V into 5k
Fixed: 1V into 5k
Audio Hum
75 dB down from 100 % modulation
Power Requirement
120 Volts 50/60 Hz, 20 Watts
Semi Conductor Complement
22 Bipolar Transistors
4 Field Effect Transistors
23 Silicon Diodes
15 Integrated Circuits
19 LED's
2 Bridge Rectifiers
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 connectors.
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/tea! nomenclature illumination. Chassis is black.
MOUNTING:
Exclusive Mclntosh developed professional PANLOC.
WEIGHT:
23 pounds (10.43 kg) net, 35 pounds (15.88 kg) in
shipping carton.
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