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By directly wiring the monitors or towers to the amplifier, the bottom octaves blend
smoother with the output.
Line Level Inputs
If your receiver or preamplifier has a set of full range RCA line outputs that are not
already being used, you can connect these into the subwoofer’s LEFT and RIGHT Line
Input jacks (pictured at right in the illustration). When using these inputs, the crossover
is still active so a full-range input will be filtered to allow
only bass to reach the subwoofer. Many subwoofers do not
have line outputs on them to use as a “feedthrough” to other
audio equipment. If you have more equipment that needs
the full-range audio signal, but only one pair of RCA preamp
outputs, you can use RCA “Y adapters” to split the signal. We
do not recommend splitting it to more than two devices and
each should have an input impedance of 20k Ohm or more.
Otherwise you may experience signal loss (a lower volume)
from one or more devices.
Dedicated LFE Input (Labeled as “Subwoofer Input”)
The dedicated LFE input is labeled “Subwoofer Input” (pictured
at left in the illustration). This is the recommended input to
use if your subwoofer is part of a multi-channel home theater with a discrete “LFE” (Low
Frequency Effects) output jack on the preamplifier/processor. There is only a single RCA
for this input because the signal has already been summed to mono in the preamplifier.
Additionally, the subwoofer’s internal crossover is disabled (bypassed). Instead, the
subwoofer’s crossover is now provided by the LFE processing within the receiver. Along
with speaker level matching by way of the Gain control (and using the 0 or 180° Phase
switch), this is the easiest method of connecting the subwoofer in a home theater
application. Remember that you
must make sure the preamplifier/processor has been
configured to enable the LFE channel output so the subwoofer will receive a signal.
Wiring for Correct Polarity
When connecting the speakers to the amplifier you need to observe the proper polarity.
This simply means that you should connect the positive terminal on your receiver or
amplifier (may be marked “+” or be colored red) to the positive terminal (red) on your
AV123 ELT525 speaker. Connect the negative terminal on the amplifier (“-” or black) to
your speaker’s negative (black) terminal. Don’t worry about damaging anything if you
make a mistake here. Sound quality will suffer but you won’t ruin anything. You can
definitely hear a difference if it gets connected backwards though. It really affects the
imaging and low frequency response in a negative way, so double check your work!!
Use the LINE INPUT (right)
for standard full range inputs
OR the SUBWOOFER INPUT
(left) for applications where
a home theater processor is
used. The difference is that the
SUBWOOFER INPUT bypasses
the active crossover because
the preamplifier already
takes care of that in the LFE
processing.
