McIntosh MX 112 Service Manual

Page 2

.un Ill

ELECTRICAL

FM TUNER SECTION

USABLE SENSITIVITY

Better than 2.5uF (IHF usable sensiti-
vityl

SIGNAL TO NOISE RATIO

Better than 65dB

HARMONIC DISTORTION

Mono, less than 075%. Stereo, less than
0.8%.

FREQUENCY RESPONSE

Flat from 20Hz to 20kHz with standard
de-emphasis and l9kHz pilot Filter

CAPTURE RATIO

Better than l.SdB

SPURIDUS REJECTION

90dB or greater

IMAGE REJECTION

75dB or greater (at IOOMHZ)

STEREO SEPARATION

Better than 30dB at lkHz

AM TUNER SECTION

SENSITIVITY

Better than l2uV at IOOOkHz (using ex-
ternal antenna input)

SIGNAL T0 NOISE RATIO

Better than 55dB

HARMONIC DISTORTION

Less than I% at 30% modulation

FREQUENCY RESPONSE
Down 6dB at SkHz

SELECTIVITY
lokHz at -6dB

IMAGE REJECTIDN

60dB or greater at IUOOkHz

SPECIFICATIONS

PREAMPLIFIER SECTION

FREQUENCY RESPONSE
:D.5d8, ZOHZ to ZO,OOOH2

DISTORTION

Less than 0.l% at 2.5 volts ZOHZ to 20kHz

INPUT SENSITIVITY (phono I and phono 2)

2 milllvolts for 2.5 volts output at IkHz

INPUT SENSITIVITY (aux, tape)

0.25 volts for 2.5 volts output

HIM AND NOISE (phono I and phone 2)

72dB below l0 millivolt Input

HIM AND NOISE (aux. tape)

SSdB below rated output

OUTPUT (main)

2.5 volts with rated input. Up to lo

volts can be developed without distor-

tion. FM and AM will produce up to lo

volts output at l00% modulation.
OUTPUT (tape)

0.25 volts with rated input. Phono input

signal of IO mlllivolts produces I.2

volts output. FM and AM will produce 1
volt output at IOO% modulation.

OUTPUT (center channel)

2 volts with rated input to both channels

BASS CONTROL
-I8dB to +l6dB at 20Hz

TREBLE CONTROL
iZOdB to 20,000Hz

LF FILTER

Flat or roll off below SGHZ, down l2dB
at 20H:

HF FILTER

Flat or roll off above SODOHZ, down lde
at 20,000H2