Clarion APX1000.2 - Manual (Page 6)

APPLICATIONS
The Clarion APX1000.2 2-channel car audio amplifier can be used in a variety
of system applications. Here are some examples to help plan your own
installation.
Bridged- Mono Subwoofer System
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Figure 3 - In this application the amplifier is bridged for mono operation to
drive a subwoofer.
Set X-Over Mode to LP and adjust
FREQ to speaker specifications.