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Speaker Asylum General speaker questions for audio and home theater. |
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Speaker Asylum General speaker questions for audio and home theater. |
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In Reply to: REVIEW: Spica TC-60 Speakers posted by Bobsprit@aol.com on November 8, 2010 at 15:50:51:
If by time aligned someone is inferring a saw tooth response of both drivers, well that is not the case.
They were angled back as much for the tilt or lobing associated with the crossover choice as for time alignment. Height to ear placement is critical, so if flat front baffle, the unit would have to be setup almost completely above listeners head.
Phase tracking between 200 and 2000 is on par and often exceeds that normally associated with first order time/phase coherent designs. But as Mr Cheney points out first hand, this required actual driver unit matching plus xover matching/tuning for each unit pair.
Spent some time investigating/reverse engineering the design of the TC 50 couple years ago with drive units I had on shelves for years. Fun and enlightening task. No idea how Mr Bau identified/figured the combo of xover slopes and Bessel alignment to achieve that final phase coherent result.
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Follow Ups
- Phase coherent, but not actually time aligned - Edp 09:08:50 11/09/10 (1)
- RE: Phase coherent, but not actually time aligned - Presto 14:44:04 11/10/10 (0)
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