Page
3.
SE-400
Instruction
Manual
continued
to
the
left
of
center
to
cause
a
decrease
.
of
volume
in
that
band.
Next,
we
would
turn
the
frequency
control
and
"tune
in"
on
the
problem
f~eauencv.
Finallv,
the
bandwidth
co~trol
would
be
adjusted
to
some
point
where
the
hum
is
made
inaudible,
but
the
other
musicul
information
is
not
affected.
This
setting
would
probably
be
towards
the
far
counterclockwise
setting
of
the
control.
In
general
(but
not
always)
narrow
bandwidth
settings
(counter-clock-
wise
positioning3)
will
·
produce
less
audible
effects
thin
wide
bandwidth
settings.
The
Input
Level
Control
The
input
level
control
for
each
channel
of
the
SE-400
is
found
just
to
the
right
of
the
high
band
arr.plitude
control.
The
color
coding
cap
used
is
light
grey.
The
control
is
calibrated
in
dB.
The
purpose
of
the
input
level
control
is
two
fold:
1)
the
control
can
be
used
to
raise
the
level
of
inco~ing
signals
to
the
equalizer
by
up
to
lOdB
if
these
signals
are
weak
or
lower
than
standard
"line
level";
2)
the
control
can
also
be
used
to
decrease
the
signal
level
coming
into
the
equalizer
by
up
to
20dB.
This
should
be
done
when
one
is
either
dealing
with
very
large
level
incoming
signals
or
wh~n
the
equalizer
is
being
used
to
boost
one
or
~ore
frequency
bands
by
signifi-
cant
amounts.
In
this
case
the
input
level
control
should
be
decreased
(turned
counter-clockwise)
so
-
that
neither
the
output
stage
of
the
SE-400
nor
the
input
stage
of
the
follow-
ing
equipment
is
overloaded
so
as
to
cause
distortion.
The
Peak
Level
Indicator
An
excellent
feature
of
the
SE-400
which
aids
the
user
in
adjusting
the
input
level
control
to
the
correct
or
opti-
mum
positio~
is
a
red
LED
labeled
+18
dBm
PAak.
When
~he
output
level
of
the
SE-400
equals
~exceeds
+18d8m
this
LED
will
flash.
+18
dBm
is
JdB
lo"wer thcJ.n
the
SE-400's
clip
point.
Thus,
the
user
is
warned
in
advance
of
a
posibblc
distortion
condition.
By
turning
the
input
level
control
downward
until
the
LED
stops
flashing
the
109
Bell
Street,
Scattle,_Vla.98121.U.S.A.
(206)
624-5012
