Alexander E. Patrakov <patrakov at gmail.com> wrote: > In other words, a filter formed by summing the two outputs or an LR4 > crossover filter is a 4th order allpass filter different from the one > obtained by cascading two 2nd order Butterworth allpass filters with > the same corner frequency. I need to write such mails when I am not sleepy. Corrected version: A filter formed by summing the two outputs of an LR4 crossover filter is an _8th_ order allpass filter. Of course, it is different from the 4th order allpass filter obtained by cascading two 2nd order Butterworth allpass filters with the same corner frequency. -- Alexander E. Patrakov Sent from Nokia N900
