Originally posted by Will:
I'm not sure adding a phase shift in the low frequencies where a subwoofer crossover occurs (with an analog crossover) counteracts harshness in the higher frequencies where harshness generally occurs.
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Adding phase shift in the low frequencies would do nothing for the highs, as you said. But dubbing stage speaker systems have analog active electronic crossover networks, analog 1/3rd octave equalization, and use horns for the high frequencies. The mixing engineers hear the sound through this system and mix accordingly.
[This message has been edited by soundhound (edited August 14, 2002).]