Not Cover Ed Unde R Warranty - Marantz 2245 Instruction Handbook Manual

C
(Note:
Close inspection
of
ständard zipcord will
'pvaal
\orp lorr
o'codinq
o'1
lhp r1'ulatron,4,q,,
rioqF
o'
g'oovp on ono pouo. onp
o
ll'F wrrp"
näy
be
"silver" while
the other is
bare
copper.)
Coded
wires help insure identical connections
for
each
channel,
For
each
channe. the coded wire can
be
connecred
between
the
"commoi"
termjnal
of
your
loudspeaker
and the
GROUND terminal
of
the
amplifier channel. The remaining
uncoded
wire
is
then connected between the remaininq Loudspeaker
and amplifier lerminals.
This
insures
correct
polarity or phasing o{ identical
loudspeakers.
l{
there is any doubt about phasing o{
loudspeaker
pairs,
or if
they
are
not
identical loudspeakers,
a
simple listeninq
test
can verify correct
phasing.
With
program
signals
fed
to
both
channels,
and
with the MONO
pushswitch
depressed,
the
sound
should appear
to
originale
at a
point
midway
between
the
loudspeakers,
with the
balance
control
centered. As the
balance
contro
is turned
away
from the
center position,
the
sound source shou
d
appear
to
move
toward one
of the
Loudspeakers.
Room acoustics
can somelimes make
this
test
ambiquous
or
confusing.
lf
so, lemporari
y
rnove
the loudspeakers
as
c
ose
toqether
as
possible.
Then
set
the controls
for
balanced IMONO
operätion
and
listen
to
program material
with
strong
bass
pass
ages. Reverse
the wires
to
one
of
the
loudspeakers
and listen
to
the
same passage again-
lf
there
is
.ofic"obly
less
b"\s
w
l I'
c 'Fvp
'ad
,
orn"cr:on.
change
the
connections back
to
the original
ar
ranqement.
lf
there
is
noticeably more
bass,
leave
the wires connected in
reverse,
These phasinq procedures
should
be used
with
each
stereo
pair
of
Loudspeakers,
whether IMAIN
or
REMOTE.
lf
both pairs of
loudspeakers
are
used in
the
sanre
listening area,
ensLrre
that
the
[4AlN
peir is
also
"in
phase"
with the
REMOTE pair.
CAUTION:
NEVER DIRECTLY CONNECT THE
LOUD
SPEAKER TERIV]INALS OF ONE CHANNEL
IN
PARALLEL WITH THOSE
OF
ANY
OTHER.
ANY
RESULTING DAMAGE
IS
NOT
COVER
ED UNDE R WARRANTY.
FM
ANTENNA
The
best
F
[/]
reception
is
obtained
with
a
Log-Periodic
type
antenna, moLnted
on a
qood
quality rolor
system.
For
fringe
areäs,
I\4arantz
recommends
a
Log
Periodic
antenna
with
six
or
more
elements designed expresslV
Jor
FM
reception. For minimum local
noise and
multipath
picl<Lrp
by the
lead
in
wires,
Lrse
a
balanced änd
shielded
300ohm cable.
(An
unshielded
lead-in
wire can act as än omnidirectional antenna,
and
can
cancel
the
directional benefits
of
your
ä1'pr1a.) Lolv los.300.ol_Tl
\'
eld"d cdb'p ' or\,sls
of two inner conductors plus an ouler shield
and
insulating jacket.
This type
of
shielded cabe
effectively prevents the lead-in from contributifg
multipath distortion.
For
rural areas,
it
is
recommended
that a
loca
dealer be
consulted about antenna installation
and
lightning arrestor protection-
I\,4aster antenna
system are
not
recommefded
{or
use
with
your
Model 2245; such systems are usually
designed
expressly
{or
television reception and
frectuently
suppress
FM
siqnals before distribution.
ln
addition, rnaster antenna systems
often
severely
limit good qLrality
FIVI
reception.
Where
ouldoor
antennas
are prohibited
or
inconvenient, use
a
simple
form of
300-ohm, TV
"rabbit ear"
antenna
or the
simple ribbon type
{olded dipole
anterrna supplied
with the
lvlodel
2245. Aarh
are
practical änd
will
qive
satisfactory
results
in primarv siqnal
areas.
Your
[,4odel 2245
Receiver
will
accept either a
75
ohm or 300
ohm
antenna. (See diagram Figure
3.) The 300ohm
inrenna cable should be connecled
to
the
two
terminals marked
FIM
on the ANTENNA terminal.
When using 75 ohm coaxial antenna cable,
connect
its sh;eld
to
the
"G"
(GROUND) terminal, and its
inner
or
center conductor
to
either
of
the
FM
üü
Fiqure
3.
Fl',4/A[4
Antenna
Connection