McIntosh MAC 4100, Owner'S Manual

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wish to hear. Set the MONO pushbutton out for
stereo. Adjust the VOLUME to desired volume. Ad-
just the LOUDness control to any desired compensa-
tion.
TAPE MONITORING
To MONITOR the program being recorded, press the
corresponding MONITOR TAPE pushbutton in.
A program being recorded may be monitored from
the playback head of the tape recorder as the pro-
gram is being recorded if the tape recorder has
s e p a r a t e playback heads and associated
preamplifiers.
A program may be modified with equalizer,
balance and loudness controls before recording, by
connecting the tape recorder inputs to the JUMPER
PREAMP OUT jacks on the rear panel. All front panel
controls, then, influence the output of the tape
recorder. Note that once recording has started, ad-
justment of the controls will change the program to
the tape recorder. In addition, the available signal
output is much higher than the output available from
the RECORDER TAPE OUT jacks. Be sure the signal
does not overload the tape recorder input. To hear
the program from the loudspeakers a "Y" connector
must be used to join the tape recorder, the
preamplifier output and power amplifier input.
choice. For most accurate fine tuning of the station,
adjust the tuning knob until the AFL indicator lights;
a sure indication that the station is exactly tuned
and locked in. Adjust the VOLUME to a comfortable
level. The FM muting circuit suppresses noise bet-
ween stations. It also suppresses weaker stations
not strong enough to override the background noise.
Muting threshold, carefully adjusted to optimum at
the factory, determines the strength of the signal
which can be heard with muting in operation. While
tuning you may notice the tuning indicator will show
a station yet no program is heard from the
loudspeakers. The muting circuit in the tuner has re-
jected the station because there is noise accompa-
nying the weak signal. Push the FM MUTE pushbut-
ton to the out position and the station will be heard.
Most programs that can be tuned in this manner are
of poor quality due to interfering noise.
LISTENING TO AM
Turn the INPUT SELECTOR to AM. Rotate the tun-
ing knob so the station of your choice shows max-
imum deflection of the SIGNAL strength meter. Ad-
just the VOLUME to a comfortable level.
LISTENING TO FM OR FM STEREO
Turn the INPUT SELECTOR to FM. Set the MONO
pushbutton in the stereo or out position. The MAC
4100 uses a Mclntosh developed automatic
mono/stereo switching circuit. The switching is
electronic and switches smoothly and silently
without clicks or transients. When the 19 kHz pilot
signal for stereo transmission is received the
automatic circuitry switches the MAC 4100 to stereo
and the FM MPX LED indicator is turned on. If the
FM station is" not broadcasting a 19 kHz pilot signal
the FM MPX Indicator will remain off and the tuner
will automatically switch to mono.
Rotate the tuning knob to the station of your
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