Sunfire XTEQ8 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 speakers
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 position, 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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User's Manual
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