Sunfire Atmos XTATM265 User Manual page 16

Using the line-level outputs
If you are using a preamplifier
that does not have a sub/LFE
output, you can send its left
and right front output into
the subwoofer's line-level
inputs and then connect the
subwoofer's line-level outputs
to the inputs of your amplifier.
The subwoofer will play the
low frequencies and your
amplifier and front speak-
ers will play the frequency
range of the subwoofer's
outputs.
The subwoofer's
output switch lets
you select BYPASS
or 85 Hz.
In the 85 Hz posi-
tion, the signals
coming out of the
subwoofer's outputs
are a copy of the
signals going into
the subwoofer,
except that the
low bass is filtered
out. This uses
the subwoofer's
passive crossover
network, rather than
the active network
and controls. This
is an excellent
method if your front speakers are
small satellites or mini-monitors, and/or
your power amplifier is of limited power,
such as a tube amp.
If the switch is set to BYPASS, then the
amplifier and speakers receive the full
frequency range. This is a good position
if your speakers are capable of good low
frequency performance.
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