directly to a power amplifier if desired.
Since the MR66 does not include a front
panel volume control, all volume adjust-
ments must be made at the preamplifier.
The MR66 rear panel output level controls
provide means for setting and balancing the
volume levels of the AM and FM outputs.
AM monophonic and FM monophonic pro-
grams appear at both STEREO MON 1 and
2 jacks, depending on whether the MODE
SELECTOR switch is set to MON AM or
MON FM.
STEREOPHONIC FM AND AM
Connect one end of a shielded cable sup-
plied with the MR66 to the STEREO MON
1 output jack on the back panel of the MR66.
Connect the other end of this cable to the
left-channel high-level auxiliary or tuner in-
put of a stereophonic control preamplifier.
Connect one end of another shielded cable
from the STEREO MON 2 output jack to the
right-channel high-level auxiliary or tuner
input of the stereophonic control preampli-
fier. Two separate monophonic preampli-
fiers may also be used for the separate
channels in a similar manner. :Channe!s 1
and 2 refer to left and right respectively.)
AM-FM stereophonic programs will be
heard with the AM through the left channel
and the FM through the right channel. Mono-
phonic AM and monophonic FM programs
will also be heard with these connections
depending on the MR66 MODE SELECTOR
switch setting. Monophonic programs will
appear through both channels simultane-
ously.
STEREOPHONIC FM MULTIPLEX
For reception of FM Multiplex Stereo, con-
nect the MR66 tuner the same as for stereo-
phonic FM-AM. Then connect the Mclntosh
MA6 Multiplex Adapter to the MR66 as
follows.
Connect the MA6 Multiplex Adapter power
plug to the FM multiplex power socket on the
MR66 back panel. Connect a 24-inch shielded
cable supplied with the MA6 adapter from
the adapter INPUT jack to the FM MULTI-
PLEX OUTPUT jack on the MR66 back panel.
Connect a 24-inch shielded cable from the
LEFT OUTPUT jack on the MA6 adapter to
the MULTIPLEX INPUT 1 on the MR66 back
panel. Connect a 24-inch shielded cable from
the RIGHT OUTPUT jack on the MA6 adapter
to the MULTIPLEX INPUT 2 on the MR66
rear panel. The numbers 1 and 2 on the
MR66 back panel refer to left and right
channels respectively.
REMOTE AMPLIFIERS
The AM and FM OUTPUT jacks on the
MR66 back panel provide separate AM and
FM signals at all times, regardless of the
MR66 MODE SELECTOR switch setting.
These jacks may be connected to external
power amplifiers for purposes of feeding
AM and FM programs to other speaker loca-
tions apart from the main sound system.
OFF-THE-AIR TAPE RECORDING
Tape recorders or tape decks with record-
playback preamplifiers are normally con-
nected to the Tape Output jacks on the con-
trol preamplifier. Any FM or AM program
coming from the tuner into the preamplifier
can then be recorded on tape. You may also
connect the AM and FM or STEREO-MON
jacks directly to the recorder inputs if desired.
AM ANTENNAS
INDOOR LOOP
For most local and moderately distant AM
reception the convenient loop antenna wire
supplied with the MR66 may be used. Re-
move the metal link between the AM AN-
TENNA terminals marked LO and GND on
the MR66 back panel. Connect one end of
the loop to the HI terminal. Connect the other
end of the loop to the LO terminal. Set the
AM ANTENNA slide switch on the MR66 back
panel to the LOOP position. (See Figure 11.)
Figure 11. Indoor Loop Antenna Connections.
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