Owner`s manual

HEADPHONE—The headphone jack is for use with low im-
pedance headphones. With the switch in the SPEAKER OFF
position the loudspeakers will turn off when you insert your head-
phone jack. With the switch in the SPEAKER ON position the
loudspeakers will remain in the system.
LOUD ... An abbreviation of loudness
OUT . . . This is the normal position for moderate to loud
listening levels. Use the LOUD ... IN position to listen to low
listening levels. It will allow you to hear the full frequency
range. With the volume turned down there is an apparent loss
of bass and treble response. When the volume is low the
human ear's response to bass and treble decreases more
rapidly than its response to notes in the mid-range. The LOUD
control automatically boosts the bass and treble. With the
switch IN the bass and treble are heard in correct proportion
to the mid-range at low listening levels.
FILTER (Combination High Frequency and Low Frequency)
Use the filter switch to reduce both high frequency and low fre-
quency noise.
OUT . . . Filter disconnect for normal flat cycles and low fre-
quency response.
onto the tape at the record head. The signal follows a difficult
path ... the tape is played by the playback head . . . through
the playback preamplifier in the tape recorder . . . out of the
tape recorder into the tape monitor inputs on the MAC 1700
. . . then through the power amplifier of the MAC 1 700 and to
the loudspeakers.
CAUTION: IF THE MONITOR LIGHT IS ON SWITCH TO THE
OUT POSITION FOR NORMAL LISTENING.
STEREO MON.
Stereo . . . for all normal stereo listening.
Mono ... for all normal monophonic listening.
IN ... reduce high frequencies above 5,000 cycles and low
frequencies below 50 cycles.
MUTING
IN ... turns on the muting circuit. Muting suppresses back-
ground hiss and noise usually heard when tuning between
stations. Weak or distant stations that cannot override the
background noise and interference are suppressed by the
muting.
OUT . . . turns off the muting to allow conventional tuning.
Interstation noise will be present. Use this setting to listen to
weak or distant stations that have noise or interference.
TAPE MON.
The MAC 1700 tape switch makes it possible to instantly com-
pare recorded material with the source signal. Tape jacks on the
back panel accept a signal from a tape recorder with a monitor
head and preamplifier. Add light information.
OUT . . . the program source is fed through the MAC 1 700 to
the loudspeakers.
IN ... the program source is fed from the MAC 1 700 to the
tape output jacks to the tape recorder. The signal is recorded
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