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The ranges are conventions for each kind of speaker, not rules. A design outside one is unusual, and plenty of good speakers are unusual on purpose. The plot compares enclosures on their own, without a cabinet model: the baffle step applies to every one of them alike.
Named alignments solved for this driver. Nothing is scored.
Ordered by how close the alignment lands, not by which is
better. That is your call, so the differences are shown instead.