“PSEUDO STEREO WITHOUT PHASE ISSUES
Wider takes the massively popular stereo section from its sibling, Manipulator, and creates the illusion of an expanded stereo image of a mono signal to an awe-inspiring amount of width. However, Wider is a unique stereo plugin in the sense that it is completely “mono-compatible”, meaning that any signal that has been extended will always remain in phase with itself,even if summed to mono.
BROADEN YOUR HORIZONS
Many stereo effects currently in use have the nasty habit of knocking signals out of phase, which can quickly make a track sound muddy and unbalanced, or make sounds seem flat and lacking dynamics if one isn’t mindful of the effect. Thanks to Wider’s one-of-a-kind all pass and comb filtering algorithm, a natural sounding stereo image is created from a mono channel, without compromising the phase between the sides! Instead, Wider cancels itself out when summed to mono, so the original signal is left intact.
Wider can be used to increase the stereo image of any mono signal up to 200% of full stereo for an extra wide, exaggerated effect.”
Source : polyversemusic.com