Peavey DPM V3 Owner's Manual page 66

Delay/Chorus and Chorus/Delay Placing delay before chorus means that chorus will
produce an overall modulation of the delayed sound. Placing chorus before delay pro-
duces a more diffused sound as the echoes repeat different parts of the chorused
signal.
Distortion/EQ and EQ/Distortion With distortion before EQ, the EQ shapes the
distorted sound. Placing EQ prior to distortion changes the character of the distortion
by emphasizing or de-emphasizing those frequencies to be distorted.
Reverb/EQ and EQ/Reverb This is an example of a combination effect where the dif-
ference between the two options is not particularly noticeable; EQing reverb or
reverberating EQ makes little practical difference.
Also, remember that you can obtain combination effects by using individual effects for
Effect 1 and Effect 2. One very useful-combination is assigning both effects to reverb.
Due to the extensive computing power required to produce reverb effects, there is a
noticeable periodic variation on long reverb tails. Using two reverbs set for different
reverb times and equivalent levels can produce a much smoother sound.
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