McIntosh MAC 4100, Owner'S Manual

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heard from the speakers. In this position a copy of
the program on tape recorder 1 can be made on tape
recorder 2. To monitor the original use MONITOR
TAPE 1 pushbutton and to monitor the copy use
MONITOR TAPE 2 pushbutton.
TAPE COPY T2 - T1 pushbutton in: connects the
output from tape recorder 2 to the input of tape
recorder 1 without affecting the program being
heard from the speakers. In this position A copy of
tape program on recorder 2 can be made on recorder
1. To monitor the original use MONITOR TAPE 2
pushbutton and to monitor the copy use MONITOR
TAPE 1 pushbutton.
MONO: The MONO pushbutton switches the audio
sections of the receiver from stereo mode to MONO.
When the INPUT SELECTOR is in the FM position
the FM multiplex light will remain on when tuned to
a FM stereo station regardless of the position of the
MONO pushbutton. The program heard will be
mono. The TAPE OUT jacks are not affected by the
MONO pushbutton.
FM MUTE: With the pushbutton in, interstation noise
and weaker stations are suppressed; pushbutton
out: noise between stations, as well as very weak
stations, will be heard as you tune across the dial.
SPEAKERS 1, 2 and 3: When each of these pushbut-
tons is pushed in, a pair of loudspeakers is con-
nected to the power amplifier outputs. Speaker 1, 2
and 3 may be selected one at a time, any combina-
tion or all at once.
POWER ON: The POWER ON pushbutton shares AC
power control, through a current sensing switch cir-
cuit, with the AC power switch on a turntable. On the
rear panel the TURNTABLE AUTO/MANUAL switch
selects the mode of operation.
When the switch is in the AUTO position and a
turntable is plugged into one of the green AC power
outlets, the AC power to the receiver and to the
black AC power outlets can be controlled by the
turntable on/off switch. When AC power to the turn-
table is turned on. automatically the receiver and the
SWITCHED black AC power outlets are turned on.
The system will remain on until the turntable is turn-
ed off. The POWER ON pushbutton controls the AC
power for any source other than the turntable.
In the MANUAL position only the POWER ON
pushbutton will turn receiver AC power on or off.
EQUALIZER FREQUENCY CONTROLS
Each of five EQUALIZER FREQUENCY controls
modifies upward or downward the tone balance of a
band of frequencies centered on the frequency
marked above the control. The flat position of the
control has a detent for easy reference. Each control
provides 12 dB boost or cut at the specified center
frequency.
Use the EQUALIZER FREQUENCY controls to
modify the sound and tone balance of program
material. Here are some suggestions from which to
start:
Problem Equalizer Correction
Bass too weak Raise 30 and/or 150
Male vocalist needs reinforcing Raise 150
Female vocalist reinforcing Raise 500
Hum on program Reduce 30
Violins, trumpets dull Raise 1500
Drum "brushes" not audible Raise 10 K
BALANCE and
LOUDness
The BALANCE and
LOUDness controls are
concentric. The BAL-
ANCE control [large
outer knob] adjusts for
equal volume of either
the left or right chan-
nels. The volume of the channels can be varied
relative to each other without affecting their combin-
ed volume.
l e f t . . . turning the control to the left accents the left
channel by reducing the right channel output.
right . .. turning the control to the right accents the
right channel by reducing the left channel output.
The LOUDness control [small center knob] in-
creases both bass and treble frequencies of both
channels as it is turned clockwise. Adjustment of
the LOUDness control allows life-like frequency
balance when playing music softly. Its contour is the
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