A special type of magnitude complementary IIR filter pair with variable transition bandwidths and impulse response lengths was used to examine the effects of these two characteristics on the subjective perception of reproduced sound. Two types of listening tests were performed. In the first the sum of crossover outputs was compared to the original signal. In the second the IIR filter pairs were compared among themselves, as well as with linear-phase magnitude complementary FIR filter pairs as a reference. The results of the tests show that the overall differences are not significant. It was found that the filters considered are suitable for loudspeaker crossover applications.
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https://aes2.org/publications/elibrary-page/?id=14178
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