Crossover types? (1 Viewer)

[Ed C]

Can somebody explain what the difference is between a 3rd-order crossover, a 4th-order crossover, and a 6th-order crossover?
Is there such a thing as a 1st-order, 2nd-order, or 5th-order crossover?
Thanks.

 

[James Mudler]

The order and slope are the same.
6db = 1st order
12db = 2nd order
36db = 3rd order
48db = 4th order
A link below for you
http://www.josephaudio.com/essay.islope.html
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Luke, I'm your father

 

[Ed C]

Thanks!

 

[ling_w]

First order = 6dB/oct phase shift = 90 deg @ crossover point
Second order = 12dB/oct phase shift = 180 deg @ crossover point
Third order = 18dB/oct phase shift = 270 deg @ crossover point
Fourth order = 24dB/oct phase shift = 360 deg @ crossover point
Fourth order is equivent to 0 deg phase shift, but 1 wavelength behind.
A 2nd, 3rd, 4th... crossover could be a cascade of lower order crossovers.
Then there are different types of crossovers, some with gentler initial rolloff, other goes for a summed flat response. The Linkwitz-Reily 4th order is -6dB at the crossover freq instead of the usual -3dB.