response is electrically flat. As the control is turned
clockwise, both bass and treble frequencies increase in
the correct proportion to each other. The contour is not
affected by different settings of the VOLUME control.
VOLUME
The VOLUME control is a precision step control
manufactured for Mclntosh Laboratory. It has 32 steps
with a 70 dB range. Left and right channel tracking is
within a fraction of a dB. This extreme accuracy is obtain-
ed through special electronically controlled resistance ele-
ment trimming.
HEADPHONE JACKS
Plug headphones into the front panel HEADPHONE jack.
Adjust the front panel VOLUME control for comfortable
headphone listening.
Signal to the headphone jacks is constant and is not af-
fected by the SPEAKER switches.
The circuits feeding the HEADPHONE jacks have been
designed to feed low impedance dynamic headphones.
Electrostatic headphones generally require higher power
than dynamic headphones. Connect electrostatic head-
phones to the SPEAKER push connectors on the rear
panel.
PRESET STATION SELECTING
FEATHERTOUCH-BUTTONS
A momentary press on one of the feathertouch-buttons
marked 1 through 6, will recall from the electronic
memory the preset AM or FM station assigned to that
feathertouch-button. The corresponding red indicator
above the digital frequency display will then light.
ENTER
The ENTER feathertouch-button and any one of the six
momentary feathertouch-buttons are used to insert into
the electronic memory the tuned FM or AM station. Six
AM and six FM stations can be preset.
To enter a station in the memory, tune to the desired
station with either the manual tuning knob or SCAN tun-
ing. Then, while pressing the ENTER feathertouch-button,
press feathertouch-button 1. Release both feathertouch-
buttons and the station tuned will be recorded in the
electronic memory for instantaneous recall when
feathertouch-button 1 is pressed.
The preset memory circuits are maintained by a special
long life battery power supply that is charged when the
AC power is turned "ON". When the receiver is first con-
nected it is wise to assume that the batteries have not
12 FRONT PANEL CONTROLS
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