"Sweet spot"

[SY]

Ken Kantor argues that the equilateral triangle is wrong for "normal" point-source speakers. His recommended starting point is listener distance 1.5 times the speaker-to-speaker distance, the former measured from the centerpoint of the line connecting the two speakers to the listener.

The rule is that there is no rule.

[hurdy_gurdyman]

With my fullrange driver based OB's, which are essentially point source, I find that everything gels better if I am listening farther back then the distance between the speakers. The center of my speakers are about 8 feet apart, while the listener chair is about 12 feet back.
Dave

[PeteMcK]

I've had a couple of tweeters sitting on top of the mid/bass enclosure, moving them backwards or forwards has quite a dramatic effect on the coherence of the sound when I'm standing close,
however maybe this changes when one is futher away and room reflections, etc take over.......

cheers,
Pete Mck