OneLouder,
It's hard to describe- I almost want to say that it's
somewhere in between a phase shifter and a bass
expander. I got the unit used with no documentation
and liked what it does for the sound. If you get the
opportunity to try one out, definitely do so. It is one
really neat effect for bass.
But I disagree with the factory literature describing
how one can attain an almost "vocal" or "human
speech" effect with it.
Cheers!
Faithmonster