Rich, maybe your note to Mark made him feel a bit better(at least until he reads this). Yeah, my undergraduate degree is a B.S. in Chemistry, so I still fool around a bit with the scientific stuff that got pounded into me.
The tilting and toeing-in would more likely have some effect on the 2500Hz crossover dip, in that getting a little more on-axis sound(which shouldn't have the dip)would help, although the off-axis sound which also reaches the on-axis listener from reflections(which actually makes up the majority of the sound in a room)would still show the dip. The 250Hz dip results from the distance situation that we discussed and changing the distances, rather than toe-in or tilt would be attempted remedies.
