Operating
Controls
Your Definitive Technology ProSub subwoofer is equipped with a full
complement
of
operating controls to ensure complete flexibility and maxi-
mum
performance in any installation. Most
of
them basically are the "set
and forget" type, although occasionally certain controls will require minor
adjustments.
Gain Control
On
the side
of
your subwoofer is a gain (volume) control. This control is
used to raise
or
lower the output level
of
your subwoofer in relation to the
other speakers in your system.
Low
Pass
Filter
Your subwoofer's back panel features a continuously variable low pass
filter. This filter is continuously variable between
40
and 150 Hz. This low
pass filter control is used to obtain the optimum transition between the sub-
woofer and your main speakers. This control should
be
set
by
ear for best
performance in your room.
Set
it to where it sounds best to you.
If
you are
running your main speakers full range,
we
would generally recommend
setting the low pass filter fairly
low
(40-70 Hz).
If
you are connecting
your ProSub using the
"LFE
In"
tum
the low pass filter all the
way
up in
order to get optimal impedance matching. When using the ProSub with
Definitive ProMonitors, please consult the instruction manual section
"Using the ProSub with Definitive ProMonitors."
Powering
Up Your
Subwoofer
.
Your subwoofer contains a built-in, active powered subwoofer section
as well as an electronic crossover and so each subwoofer must
be
plugged
into an electrical socket
of
the appropriate voltage (as indicated
on
the back
of
your unit) using the plug
on
the end
of
the black cord attached to the
electronics module on the
back
of
the loudspeaker.
The
subwoofer has a
special circuit
which
automatically turns the powered subwoofer section on
when
a signal is fed to the loudspeaker and does not require an on-off
switch.
The
red
LED
on
the
back
panel will light up
when
a signal is
sensed and the amplifier turns on.
It
will automatically
tum
off
a little
while after the signal is discontinued.
The
ProSub has a special circuit which automatically turns the powered
subwoofer section
on
when
a signal is fed to the loudspeaker and does not
require
an
on/offswitch. We suggest plugging the ProSub into a circuit
which is
on
all the time and not into a switched outlet.
When
the ProSub is
plugged into a circuit and receives
AC
current, initially
you
may
hear a
pop
which
is completely normal as the system first activates, itself to
stand-by mode. Then,
when
a program signal is fed to the speaker you may
hear a
pop
which is normal.
If
you unplug the speaker
or
turn
off
the
AC
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