Aperion Audio SW-12 - Manual (Page 13)

Stereo Connection - Speaker Level Sub Output
There are a few reasons why one might choose to use the speaker
level inputs on the subwoofer instead of the low level inputs. RCA
terminated coaxial cable can be hard to find in long lengths. Some
older stereo receivers or preamplifiers are not equipped with "sub-
out" or “pre-out” jacks or you may want bypass the hi/lo filters
on your AVR receiver, thereby activating the sub's crossover which
will allow you more control in selecting the crossover point. In
these instances, connecting a powered subwoofer with speaker
wire is the best method.
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Left Front Right Front
Receiver
Processor/Amplifier
Left
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Right
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SW-12 Amplifier Shown