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RE: drivers out of phase?

Posted by DMW (S) on December 9, 2009 at 03:51:39

In Reply to: drivers out of phase? posted by vad69 on December 8, 2009 at 18:01:07:

Are you asking this because of some "absolute polarity" concern?

If a simple single section Butterworth filter were used with a woofer and tweeter, or a capacitor to the tweeter and an inductor to the woofer, and with both drivers wired with the same polarity, there is still a 90 degree phase difference between the two drivers. The human ear cannot detect this (though some would claim that they can). Such a crossover is called "minimum phase." As some already said the crossover topology and the individual driver responses might require that the polarity of one driver be reversed. If you reverse the polarity of a driver to have both wired the same polarity, the result might be anything but the drivers sounding "in-phase" and this can result in peaks or dips in response.

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