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Impact Series User’s Manual
T
o 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
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. (See figure 2a
on page 7.)
2) If using a receiver with LFE out, be sure the LFE channel is sending adequate signal to the
subwoofer. We recommend setting the subwoofer’s level to the 9 o’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!!!
Do 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 - r
ed (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. A good 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 a minimum level.
It is ver
y impor
tant to verify that your r
eceiver 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 pr
ocedur
e. If your receiver Sub-Out channel is set too low, the subwoofer may
appear to have a weak output, it may sound noisy or distor
ted, and the Auto On/Off feature
may not operate properly.