McIntosh MX113, Owner'S Manual

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What the Controls Do and How to Use Them
INPUT SELECTOR
Select any one of five program sources:
AUX: Connects the output from any high level program
source requiring flat amplification to the high level
input stage. In the AUX position the gain is 20 dB to
the MAIN outputs and 0 dB to the TAPE outputs. The in-
put impedance is 250,000 ohms.
TAPE: Connects the output from a complete tape re-
corder to the high level input stage of the MX 113. The
TAPE position has flat amplification. The gain is 20 dB
to the MAIN outputs. The gain is 0 dB to the TAPE
outputs.
AM: Connects the AM tuner portion of the MX 113 to
the output jacks.
FM: Connects the FM tuner portion of the MX 113 to
the output jacks.
PHONO 1: Connects the output of any magnetic phono
cartridge to the low level input stage. The response of
the low level stages has been shaped to conform to
RIAA standards. The gam at 1000 Hz is 62 dB to the
MAIN outputs; 42 dB to the TAPE outputs. The input
impedance is 47,000 ohms.
P H O N O 2: Same as PHONO 1
BASS
The BASS is a concentric control. The outer knob controls
the low frequency response in the right channel. The center
knob controls the low frequency response in the left chan-
nel. The two knobs are friction coupled. This permits them
to be adjusted together or independently. Clockwise rota-
tion increases lows and counterclockwise decreases lows.
Turn the control to the center position for flat response.
TREBLE
The TREBLE is a concentric control. The outer knob con-
trols the high frequency response in the right channel. The
center knob controls the high frequency response in the
left channel. The two knobs are friction coupled. This per-
mits them to be adjusted together or independently.
Clockwise rotation increases highs and counterclockwise
decreases highs. Turn the control to the center position for
flat response.
BALANCE/LOUDNESS
The BALANCE/LOUDNESS is a concentric control. The
outer knob controls the balance between channels. The
center knob is a switch that adds loudness compensation
for low volume listening.
BALANCE
The BALANCE control adjusts for unequal volume in
either the left or right channels. The volume of each chan-
nel can be varied relative to the other without affecting
their combined loudness.
LEFT . . . turning the control to the left accents the left
channel by reducing the right channel output
RIGHT . . . turning the control to right accents the right
channel by reducing the left channel output.
LOUDNESS
The LOUDNESS control automatically provides the cor-
rect amount of bass required to compensate for the change
in response of the human ear at low-loudness levels.
When the volume is reduced, the music will seem to lose
much of its bass and some of its treble. This effect is due
to the sensitivity characteristic of human hearing. The re-
sponse of the human ear to bass and treble pitch decreases
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