Jeff,
Quote:
many experts claim that it's too localizable and that THX should have chosen a lower crossover point.
I think there are relatively few "experts" that claim THX should have chosen a lower crossover point. Bob Stuart, THX, Bose, Dolby, M&K and others have actually put trained ears to the test and found that it is extremely rare for people to be able localize the bottom two octaves. I got a practical demo of this when I visited the facilities of M&K Speakers a few years ago (I used to live near them in Culver City). I'll have to agree with Kevin: 80Hz is a pretty safe crossover point.

Sanj
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Sanjay