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Marantz Model 4300 Manual

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SPEAKER PHASING
To
assure
the
best 4-channel or Stereo separation
and frequency response,
the
following tests will
verify
that
all four speakers are correctly phased.
1.
After
the
speakers are connected
to
the
4300,
place
all
four speakers in
the
center of
the
room.
2. Set MODE Switch
at
MONO.
Play a record
(or radio
or
tape) with strong bass tones,
at
a
low volume level. Center
the
FRONT
L-R
and REAR
L-R
BALANCE controls.
Set
FRONT-REAR BALANCE control
at
extreme
FRONT position.
3.
Position
the
front (left and right) speakers
about
six inches apart, face-to-face. Listen,
particularly
to
the
apparent loudness
of
the
bass tones.
4. Next, turn off all power,
but
do
not
disturb
the volume,
tone
or balance settings. Reverse
connections on the right-front speaker only.
Turn on
the
power, and listen again.
If
the
bass tones now seem louder than
in
(3), you
have corrected
the
phasing between
the
front
(left and right) speakers. If the bass tones
now sound softer, then turn
off
all
power and
re-connect
the
right-front speaker as you first
had it connected.
5. Now check phasing between
the
two
left (front
and rear) speakers.
Set
both FRONT
L-R
and
REAR L-R BALANCE controls
at
extreme L
position, and set FRONT-REAR BALANCE for
equal loudness from
the
two
speakers. Posi-
tion
the
two
speakers face-to-face,
about
six
inches apart, and listen
for bass as
in
(3).
'.
,~
~
6.
Turn
off
power. Experimentally reverse con-
nections only on
the
left-rear speaker.
Use
the
connection which gives the
"best"
bass,
as
in
(4).
7. Last, check phasing between
the
two
rear
(left and right) speakers. Center both FRONT
and REAR BALANCE controls.
Set
FRONT-
REAR BALANCE control
at
extreme REAR
position. Position
the
two rear speakers face-
to-face as before. Listen for bass.
8. Turn off power. Experimentally reverse con-
nections only on
the
right-rear speaker. Listen
again
to
determine
the
"best"
bass method
of
connecting
the
right-rear speaker.
All
speakers
will
then be
in
phase, and you may use all
controls normally.
9. Once having phased
your
four speakers, you
need
not
repeat
the
procedure in
the
future if
you now code
the
speaker connections and/or
the
speaker cables. Any
method
of
coding
is
satisfactory, provided
it
enables you, in
the
future,
to
duplicate
your
now-correct hookup
between speakers and amplifiers.
SPEAKER PLACEMENT
Experimentation will reveal
the
best speaker
locations in
your
room. The placements are
shown in Figure
4.
… 7 …


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