When I got the PC212, the first thing I did was set the Stereo Width to 200% (MAX) and loaded up a stereo preset. It sounded like the speakers were 8 feet apart! I have my PC212 between my FRFR112 and my Studio Monitors which are about 4 feet to either side of the PC212, and it sounded like that was where the sound was coming from.
The preset has a phaser, and it was disorienting!
I had to narrow the field, finally settling on 125% as ideal for my ears. That sounds a bit wider than my Studio Monitors (6"), which are about 4 feet apart.
When I stated above that the the separation is AWESOME, that was NOT hyperbole! I have no clue how it works, but it sounds GREAT!