User`s manual
INSTALLATION
Inputs
Your new subwoofer is equipped with speaker-level and line-level inputs. Use
the
LINE
LEVEL
jacks when connecting your subwoofer
to
a pre-amp, signal
processor
[such as
LFE
out], line-
level crossover,
or
receiver with pre-amp level outputs.
When
using the line level jacks, some
receivers may
not
provide enough signal
to
have
the
unit's auto-on feature operate properly.
Additionally,
this
lack of signal may also cause
the
subwoofer
to
produce less output than
it
is
capable of.
To
alleviate
this
condition, we
recommend
the
following steps:
1) If using line level jacks, BOTH
THE
LEFT
AND RIGHT INPUT SHOULD ALWAYS
BE
USED
-
never use
just
the
left
or
just
the
right
input. If using line level connections
from
a
preamp
or
signal processor, use both Left and Right inputs
from
your preprocessor
or
preamp
and connect
them
to
the
Left and Right inputs on your subwoofer.
2) If using a receiver with
LFE
out, be sure
the
LFE
channel is sending adequate signal
to
the
subwoofer. The subwoofer's default volume setting is
30
on a
1-80
scale [roughly
1/3
volume). Adjust
the
LFE
channel on your receiver
or
processor
to
achieve the desired bass
output. See your receiver
or
processor's owner's manual
for
more
information.
Volume
Control
This control allows you
to
balance
the
output
from
the
subwoofer
to
the
main speakers
in
your
system. This control should
be
set
to
achieve similar output levels
from
both the main speakers
and subwoofer when listening
to
music. The default volume setting is
30
on
a
1-80
scale.
Warning:
Some
manufacturers
preset
their
receivers with
the
Sub-Out channel signal
at
a
minimum
level.
It
is very
important
to
verify
that
your
receiver Sub-Out channel is
set
to
the
same
output
level
as
your
front
right
and
left
channels.
Refer
to
your
receiver manual
for
the individual channel
level
adjustment
procedure.
If
your
receiver Sub-Out channel is
set
too
low,
the subwoofer
may
appear
to
have a weak output,
it
may
sound
noisy
or
distorted,
and
the
Auto
On/Off
feature
may
not
operate
properly
Low-pass
Crossover
-
40
to
120
Hz
All
inputs sum
the
left and
right
channels together, with
the
resulting signal passing through an
adjustable low-pass crossover before being amplified. The crossover control allows you
to
adjust
the
upper
limit of
the
subwoofer's frequency response
from
40
to
1
20
Hz.
The subwoofer's
response will begin rolling off above
the
frequency you
set
this control to.
You
should
set
the
crossover
frequency
to
obtain a smooth and seamless transition
from
the subwoofer
to
the
main speakers
in
your system. If your main speakers are smaller with limited low frequency
output, you may wish
to
choose a higher frequency [such as
100
-
120
Hz)
than you would with
larger
speakers which have
greater
low frequency output. The default crossover setting is
80
Hz.
With
larger
speakers, you may
want
to
set
this even lower,
for
example
70
Hz.
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Optimum
User's
Manual
3