McIntosh MX 114 Service Manual

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HItIniush

MX 114

SERVICE INFORMATION

STARTING WITH SERIAL N0. IOVOI

McINTOSH LABORATORY INC. 2 CHAMBERS STREET BINGHAMTON, NEW YORK

Irll XW

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x ELECTRICAL smmcmous

TUNER SECTION

USABLE SENSITIVITY

Better than 2-5HV (IHF usable sensiti-
vity)

SIGNAL T0 NOISE RATIO

Better than 65dB

HARMONIC DISTORTION

Mon%, less than 0.5%. Stereo, less than
0.8 .

FREQUENCY RESPONSE

Flat from 20Hz to 20kHz with standard
de-emphasis and l9kfiz pilot filter

CAPTURE RATIO
Better than 1.5dB

SPURIOUS REJECTION

90dB or greater

IMAGE REJECTION

75dB or greater (at 100MHz)

STEREO SEPARATION

Better than 30dB at lkfiz

PREAMPLIFIER SECTION

FREQUENCY RESPONSE
:O.5dB, ZOHZ to 20,000Hz

DISTORTION

Less than 0.1% at 2.5 volts onz to 20kHz

INPUT SENSITIVITY (Phone 1 and phone 2)

2 millivolts for 2.5 volts output at lkHz

INPUT SENSITIVITY (aux, tape)

0.25 volts for 2.5 volts output

HUM AND NOISE (phono l and phono 2)

72dB below 10 millivolt input

RUM AND NOISE (aux, tape)

85dB below rated output

OUTPUT (main)

2.5 volts with rated input. Up to 10
volts can be developed without distor-
tion. PM will produce up to 10 volts
output at 100% modulation.

OUTPUT (tape)
0.25 volts with rated input. Phono input
signal of 10 millivolts produces 1.2

volts output. PM will produce 1 volt out-
put at 100% modulation.

OUTPUT (center channel)

2 volts with rated input to both channels

BASS CONTROL
-leB to +16dB at 20Hz

TREBLE CONTROL

:ZOdB to 20,000Hz

LF FILTER

Flat or roll off below 50Hz, down 12dB
at 20Hz

HF FILTER

Flat or roll off above 5000Hz, down 12dB
at 20,000Rz