dbx 463X - Page 8

HP
1
POWER
LED. This
indicates when
the
unit
is
connected
to
a
live
ac
outlet.
2
STEREO
SLAVE
LED. See previous
page;
this
indicates
that
the
unit
has
been
set
by
its
rear
switch
to be the
Slave
in
a
1 63X
or
463X team.
3
DOWNWARD
EXPANSION
LEDs. These
12 LEDs
show
in
dB
how
much
the
signal
is
being
gated.
4
DOWNWARD
EXPANSION
slider. For
any signal that
goes
below
the
threshold
point
(see
below),
moving
this slider
to the right
—
MORE
—
increases the
amount
of
gating,
pushing
that
signal's
level
down
both farther and
faster than the
signal's
natural
decay
rate.
The
ultimate
amount of
this
attenuation
depends
on the
slider
position,
of
course,
as
well
as
on how
far
below
threshold
the
signal
is
in
the
first
place.
We'll
discuss
this in
detail
presently.
5 THRESHOLD.
This thumb
knob
sets
the point where
gating begins,
the
level
below
which
a signal
is
attenuated.
Set
fully
clockwise
(+10)
and
the
signal
will
begin
to
be
pushed
down
even when
it's still
loud.
Turn the knob
counterclockwise
and the
signal
is
not
gated until
it has
dropped
to a low level
on
its
own.
At
full
ccw, the
gate
is
inactivated
and the
463X
effectively
bypassed.
Ideally,
the
knob
should
be
set
such that
only
wanted
signal
is
above the threshold,
and
below
it
is only
unwanted
signal
or noise.
THRESHOLD
LED. This
will
light
whenever
the signal
level
goes
above
the
threshold
point.
It's very
useful
for setting
levels
and
adjusting
the
463X
to work
at
exactly
the
right
times.
6
Hi
-2 input
jack.
This
connects
to
the 463X's low-noise
FET preamp.
There's
enough
gain
that
virtually
ail
low-level
instruments
can be
plugged
in
directly
—
guitars,
basses,
keyboards,
even
high-impedance
mikes.
As
explained,
there's
a gain
trim
on
the
rear
for
ve
|7
hot
instruments
(likely to
be
useful
with
some
synthesizers,
etc.).
Note
that this
jack
overrides
the
rear
line-level
input.
-
3
-