Basically, if you are just KJ'ing, mono is probably fine. If you are DJ'ing & KJ'ing you're probably best to run stereo for the best effect for DJ stuff recorded in stereo. Then again, it's probably all going to sound good as long as you have good recordings and you know how to tweak your system for whatever venue are playing.
Just remember that if you're coming out of a stereo jack
(e.g. headphone jack) and youre going to mono, you should always use a stereo jack that converts to mono jack. Gotta go!
Wally
