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"Most" designs do NOT "flip the polarity of the tweeter to gain better coherence"

Only TRUE second-order designs, with both drivers -6dB at crossover frequency, and rolling off at 12dB/octave for at least an octave above and below that frequency, do that. Utterly unnecessary with first, third, or fourth-order crossovers.

Remember, we're talking acoustic crossover here, with slopes being the sum of the electrical transfer function of the filters and the natural unfiltered response curves of the drivers. Unless there is a VERY broad, flat overlap of the unfiltered driver responses, like four octaves, true first or second order acoustic slopes are really difficult to attain.

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  • "Most" designs do NOT "flip the polarity of the tweeter to gain better coherence" - Brian H P 10:49:38 07/22/14 (0)
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