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more rapidly than its response to pitch centered in the mid-
tonal range. The LOUDNESS switch converts the volume
control to a loudness compensated control. Use LOUDNESS-
IN to listen at low volume and still hear full-frequency range.
VOLUME ON/OFF
The VOLUME control regulates the loudness in both
channels. The VOLUME control has been precision tracked
throughout the listening range (0 to -65 dB) for accurate
stereo balance. When rotated to the counterclockwise posi-
tion the AC power to the MX 113 is turned off.
Using the Pushbuttons
MODE SELECTOR
Stereo
With the pushbutton at the OUT position the left channel
is heard from the left loudspeaker and the right channel is
heard from the right loudspeaker.
Mono (L + R)
With the pushbutton at the IN position the left and right
channels are added together and are heard from both
loudspeakers.
LF FILTER
With the pushbutton at the IN position the low frequency
response is attenuated below 50 Hz. The slope is 12 dB
per octave. Use of the LF filter reduces unwanted low fre-
quency noise such as rumble. With the pushbutton released,
the response of the MX 113 is flat.
HF FILTER
With the pushbutton at the IN position high frequency
response is attenuated above 5000 Hz. The slope is 12 dB
per octave. Use of the HF filter reduces unwanted high fre-
quency noise like hiss or scratch. With the pushbutton re-
leased, the response of the MX 113 is flat.
TAPE
The TAPE pushbutton allows instantaneous comparison
of recorded material and the program source. With the push-
button at the IN position, the recorded tape is heard. With
the pushbutton at the OUT position the program being
recorded is heard.
IMPORTANT: When the MX 113 is operated with the
TAPE pushbutton at the IN position, signal from any
other source will not be heard from the loudspeakers.
To hear any other program source, the pushbutton must
be at the OUT position.
MUTING
MUTING suppresses the background noise and hiss
normally heard between FM stations. With the pushbutton
at the IN position the muting is turned on. Weak stations
that may not override noise and interference are also sup-
pressed by the muting. With the pushbutton at the OUT
position, the muting is turned off. This allows conventional
FM tuning with the between station noise and interference
present.
SELECT
With the SELECT pushbutton at the IN position the selec-
tivity of the MX 113 is increased in both FM and AM. The
sides of the IF curve are compressed which increases the
ability of the tuner to separate a weak (distant) station
from a strong (local) station on adjacent channels.
PANLOC
Mclntosh developed PANLOC mounting brings profes-
sional installation technique to stereo. Depressing the
PANLOC buttons will lock the instrument firmly in the
installation. Depressing the PANLOC buttons a second time
will release the instrument. It can then be pulled toward
you to the "adjustment" position. In this position the top
panel controls can be adjusted.
7
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