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General speaker questions for audio and home theater.

Response at the crossover frequency

Any second order (12 db/octave) filter, Butterworth, Linkwitz-Riley, Bessel will create an 'infinite' hole at the crossover frequency if the two drivers are hooked up with the same polarity.
If you reverse the polarity of one of the drivers, you get a 'bump' of 3 db with a Butterworth filter, a flat response with a Linkwitz-Riley. When your ears are at the same distance from each driver.
I really like the results with a second-order L-R, when the woofer and the tweeter, as well as the choice of the crossover frequency, are adequate.


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