Planar Speaker Asylum

RE: Active crossover with 48dB slope capability?

130.76.32.167

In Reply to: RE: Active crossover with 48dB slope capability? posted by David Yost on October 23, 2009 at 04:41:08

David,
All the digital crossovers I've used will support at least 48 dB/octave filters in either Butterworth, Bessel or L&R configurations

I'm aware the DEQX box will support even higher order filters. The Rane RPM series allows you to design your own filters, thus one could cascade several 48 dB filters as well.

In theory, an infinitely steep crossover would prevent the two adjacent drivers from both radiating the same frequency. This approach eliminates any constructive/destructive interference (comb filtering).

In practice, fourth-order (24 dB/octave) passive crossovers have provided excellent sound for years. These eighth-order digital crossovers are twice as steep as any traditional crossover, which seem more than adequate. I'm not sure going to any higher orders (96 dB/octave?) would really provide any real-world audio improvement. At some point a cliff is a cliff.

regards,
Jim

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