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hiss
is
too loud, turn up the CSP-I and turn
down
the
amplifier
gain or
visa
versa
to
achieve the
best
signal-to-
noise
performance. Adjust subwoofer
levels
for
bass
output
equivalent
in
level
to the
other speakers. lncrease
in
bass
output can then
be
achieved with
the
bass equalizer
after
completing
all
other
level
adjustments.
SYSTEM
PHASING CHECKOUT
Please note
that you must
be
certain there is proper
phas-
ing
throughout the system before final
level
calibration
can
be accurately
and
reliably established.
Accurate
phasing
of the loudspeakers in the system is also essential for
pre-
cise localization
of
images
and deep bass
response.
lnsure proper
phasing by
verifying that the speaker
wiring
color coding indicates correct phasing connections
between all
amps and
speakers.
After system phasing
checks are
completed use
the
inter-
nal noise
sequencer within
the
CSP-1
to verify
proper
hookup. The burst
of
noise
will
come from
the
LF,
CF,
RF,
LR,
and
RR
speakers and
move
clockwise around
the car.
SETTING
SPEAKER LEVELS
Adjusting the
CSP-1
output levels is done after completing
all
amplifier
level
adjustments and verifying correct
phasing
of
all
speakers as
discussed
in
the two previous sections.
A dB Sound Pressure Level (SPL) meter
is
required
to
properly
adjust output levels
of the
CSP-1
in
conjunction
with
the built
in noise
sequencer.
The noise
sequencer
but-
ton is
located
on
the end panel of the
CSP-1. The
goal
is to
set
the volume at
the
primary listening position
to
read
the
same
dB
SPL
level (C-weighted, slow mode) from
each
speaker. The levels of
each
speaker may
be
ad.iusted with
the individual speaker level
controls. You
should
use
the
meter pointing straight up at the
roof so
as
not
to favor
one
speaker over
another.
ldeally,
the
]average"
setting
of the
individual
output
level
controls should
be
near the middle
of
their range.
The sim-
plest way to achieve
this
is
to set
a
single channel's output
level control in
the middle
of
its range and then use
the
reading obtained
on
this speaker
(with
the
noise
sequencer
button on) as the reference
SPL level.
Then adjust the
rest
of the individual output level controls to match the
refer-
ence sound
pressure level using the test tones generated
by the
noise
sequencer.
ln the absence
of
a dB
SPL
meter,
it
is possible
to
set
the
output level controls by ear.
Use
the built-in
noise
sequencer on the
CSP-I
to adjust
all
volumes to sound
the
same as
they cycle
arourid the various
speaker;.
The
test
signal
is
bandwidth-limited pink
noise
to
minimize
the prob-
lem
of timbre shifts
influencing
the
setting
of
levels.
Even
so, using
non-matched speakers,
especlally
mis-matched
Left-Front,
Center,
or
Right-Front,
may make
lt difficult
to
judge
proper balance due to variations
in
spectral
balance.
Simply
get as close as you
can!
The system
will
then
be
reasonably well balanced.
13
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