Thanks.


Yes. Linkwitz and Reily have become quite famous for designing a crossover filter that is not only is flat in frequency but quite well behaved in phase too. What this means for the speaker is that, in the crossover region, they are moving in the same direction at the same time (i.e. in phase).

With digital signal processing becoming affordable for home theaters it became possible to design filters with perfectly linear phase (FIR filter-Finite Impulse Response filter). These types of filters are popular because linear phase implies that the output in the pass band is the same as the input except shifted in time, usually by half the filter length. It's simple to line up multiple filter outputs (say 10) when you reconstruct the signal.

That's the purist view. Infinite impulse response filters can be made to work also and usually require fewer computations.


idk. I understand the signal processing aspects well enough but the human perception of the acoustics is not my area of specialty. I just do what the experts say. The trick is figuring out who the experts are.