Specifications

THE MAC 4100
A HIGH QUALITY, HIGH POWER
AM/FM STEREO RECEIVER
AUTOMATIC POWER TURN ON/TURN OFF
Power to the entire stereo system can be control-
led from either the front panel power switch or the
turntable's power switch. A current sensing relay
connected to the turntable AC power outlets is
controlled by the turntable power switch. The
relay, in turn controls the AC power to the re-
mainder of the system. Sensitivity of the circuit is
adjustable to match the current consumption of
your turntable.
POWER GUARD INDICATOR AND
PROTECTION CIRCUIT
Loudspeakers are protected from burnout by the
Power Guard circuit and also by other circuits
that instantaneously disconnect the speakers in
the event of the presence of DC on the output.
Two power guard indicators indicate when the
power amplifier has reached full output. At this
point the power guard circuit begins to control
amplification dynamically so that you will not
hear the harsh distorted sound of square wave
clipping. In addition your speakers are protected
from burnout.
SPEAKER SWITCHES FOR
THREE SETS OF SPEAKERS
Three sets of loudspeakers may be used one at a
time, two together, or all three simultaneously.
DUAL TAPE MONITOR AND
TAPE COPY SWITCHES
Two tape recorders can record simultaneously
from the program being listened to or you may
record from one to the other without interfering
with the "Listen" program.
FIVE BAND TONE SHAPING CONTROLS IN
EITHER THE RECORD OR LISTEN CIRCUITS
Five separate controls permit individual musical
spectra shaping to satisfy personal preference or
program limitations. There is 12 dB plus or minus
control at center frequencies of 30, 150, 1.500 and
10,000 Hz. In the center (detent) position the tone
shaping circuits are not active.
ACTIVE LOUDNESS CONTROL
Loudness controls typically are simple, passive
circuits connected to a portion of the rotation
range of the volume control. As a consequence,
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