Marantz 2245 Instruction Handbook Manual page 8

AUXILIARY
High level
AUX
input
iacks are
for
miscellaneous
sources
such as extra tape players
with
self
contained playback
preampl
if iers,
phono cartridges
wilh
RIAA equalized
high-level
output,
additional
t!ners and/or
receivers,
TV
sound outputs,
and
other external components.
OUADBADIAL
ln
anticipation
of
rhe coming o{
4
channel stereo
broadcastinq,
your l\lodel 2245
is
equipped
with
an
ourpur OUADRADIAL jack. The
signal
available at
this jack is the unequalized, buffered output of the
Fl\,4
discriminator.
lts
level, frequency
response
characteristic and
output
impedance
are ideal to
drive anv
4
channel adaptor. This jack can also
be
used
as
a
simple
white noise generator
for
{re
quency
response
check
of
loudspeakers
or
ampli
fiers,
with the
lvlodel
2245 in
FI\4
mode and
tuned
off from
any FM signal.
MAIN lN
and
PRE OUT
Connections
Jrom
the
l!4odel 2245 preamplifier
outputs
to
the
power amplifier inputs are
per
+ormed
externally. Special jumper
plugs
normally
interconnect these
lvlAlN lN
and PRE OUT iacks
Removing these
two special jumper plugs allows
you 10
use
vour 2245
as
an
independent basic
stereo amplifier and/or
an
independent
stereo
control center,
Be sure
to
replace
the iumper
plugs
between
the MAIN
lN
and PRE OUT jacks for
normal operalion.
3
Figure
2.
Loudsteaker
System Connections
LOUDSPEAKEB SYSTEMS
The SPEAKEB
SYSTEIMS
terminals
on the
rear
panel will
accommodate
Iwo
stereo
paars of
loudspeaker systems
of rated impedance between 4
ohms
and 16 ohms. When using
only one
stereo
pair
o{
loudspeakers, connect
them
to
the MAIN
terminals. The
REII4OTE
{erminals
are
for
a
second
stereo
pair
of
loudspeakers.
Selection
of
loudspeaker systems
is made
wilh
the
lvlAlN-SPKR-REMOTE pushswitches
on lhe front
panel.
Use
caution
when connecting
your
lvlodel 2245
to
a
loudspeaker
with
bualt
in power supply
such
as
an
electro-static loudspeaker,
Tl,e
"common"
conneclion terminal
of
such
a
speaker
may
be
capacitivelv qrounded through its
power
supply.
Vlake sure
the GROUND terminals
of the
Model
2245 are connected
to
the
"common"
terminals
of
such
loudspeaker system.
Ordinarv
#18
qauge,
2
conduclor
lamp
cord
("zipcord"i
may be used
for
normal distances (to
about 25
Jeet) belween
your 2245
Receiver and
your
loudspeakers.
For longer lengths, +16 gauge,
or
heavier
wire should be used
to
ensure
optimum
speaker
performance.
When
connecting
a
slereo
pair of
loudspeakers,
it
is
important
to
ensure
correct relative
phasinq
(polarity). When usinq identical
loudspeakers,
simply code one wire
of
each pair
at
both
ends
with
a
knot,
tape. etc.
J