This one is magic! I can't figure out how they've done it, it's impossible. I have tried a lot of stereo wideners before and the drawback has always been that the process would make the signal incompatible with mono. Not this one. Put it on a ping pong delay or anything panned really and experience how stereo should sound like. To get wide stereo, use mono signals panned hard or use the bx_stereomaker.