
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 the subwoofer's input comes
from
the
LFE
channel of your receiver, use the included
"Y"
splitter
to
supply the single input
to
both
connectors
for
the Left and Right subwoofer inputs. If using line
level
connections from
apreamp
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.
(See
figure 2a
on
page 7.)
2) If using areceiver with
LFE
out,
be
sure the
LFE
channel
is
sending adequate signal
to
the
subwoofer.
We
recommend setting the subwoofer's
level
to the 9o'clock position (the
1/4
volume setting) and then 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.
(See
figure 2b
on
page 8.)
The
SPEAKER
LEVEL
jacks connect directly
to
the speaker outputs of
any
amplifier, integrated
amplifier,
or
receiver. Your amplifier section will notice no additional loading effects when
you
use these inputs due
to
their
very high impedance. If using the
SPEAKER
LEVEL
inputs,
you
DO
want
to
connect both channels, since different bass information might
be
present
in
each
channel going
to
your main speakers.
Important!!!
00
not
use both LINE
LEVEL
and
SPEAKER
LEVEL
connections simultaneously!
Caution!!!
To
avoid damage to your main amplifier, be sure to maintain
correct
polarity when making all
connections -
red
[positive) to red, and black (negative) to black. Be sure all connections are
tight, and
that
there are no loose strands
or
frayed wires.
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. Agood starting point for the volume control
is
two
or
three graduations from minimum.
Warning:
Some manufacturers
preset
their
receivers with the Sub-Out channel signal
at
aminimum
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 aweak output,
it
may sound noisy
or
distorted, and the Auto
On/Off
feature
may
not
operate properly.
WWW.VELODYNE.COM
Impact
Series
User's
Manual
3