now, when would you use these different configuations (I just bought a matched pair of ADK-TLs).
so many different variables here. it depends upon these factors. anybody else please feel free to chime in on any i missed:
-how the PA(if any) is set up and sounds
-where you want/can set up in relation to the PA/stage. If you can find that sweet spot and can set up there, DO IT! depending where that is, set up a config that will yeild you the best possible soundstage and overall music response.
-basically how the room sounds in general
-if taping on stage the way the musicians are set up will ultimately determine the config to use IMHO.
there's lots of info about different configs on this board that will give you more help than this one lame post. do a site search for a config you want to learn about. lots of info on *omni's* and *DIN vs. ORTF* here especially.
Brian