Peavey DPM V3 Owner's Manual page 58

Left out
Parallel Configurati
The dual connection feeds the left channel to one stage and the right channel to the
other stage. Each effect synthesizes a stereo output, and these are mixéd together into
a master stereo output. Each output has an associated level parameter.
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Dual Configuration ©
Effect 2 does not offer different configurations. If Effect 2 includes a pair of effects,
these are always set up in series (in a manner identical to Effect 1 when it's set up in
series).
However, Effect 2 does include a send control. This allows you to "send" some or all
of the pre-panned program output to Effect 2. Example: You might want to add a
very subtle amount of the exciter effect; set up Effect 2 as an exciter, then send a
small amount of the program sound to Effect 2.
The following diagram shows how Effect 1 and 2 are configured. The diagram
assumes that both Effect 1 and Effect 2 are set up as dual effects, yielding four effects
in total. However, either or both could also be set up as single effects, or be bypassed
if you don't want any effects at all. Note how the send parameter determines how
much signal goes to Effect 2.
4.3