So i have been pondering the matter about using mono/stereo divisions when producing, (obviously having sub, kicks, low mids and bottom ends of snares in mono and pretty much everything else in stereo). What i was wondering is that i have read a lot of places, club systems are wired in mono so things like stereo panning wont ring true when you hear them out? I know that vinyl is mono but seeing that a large majority of DJs play CDs (in stereo format), does that mean that when you play the CD say in your car, you can hear the stereo effects, and when you play the same CD at a club, you wont hear them? Also can anyone shed any light on Phase cancellation with stereo/mono, as i have also read many places "always check your mix in mono to check for phase cancellation".... Cheers!