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May 28, 2019 / consort3

Sixth order active LR crossover

For the sake of completeness in Consorts cornucopia of crossover circuits, I thought I would design an active sixth order LR crossover. I had just finished a design, when I found those nice people at Rane had said you can do it with two cascaded third order Butterworth filters. Shades of the 4th order LR being cascaded 2nd order Butterworths. This would save an op-amp and it worked in Ltspice so here it is. Note the tweeter has to be reversed.

6thorder2

6thorder1

How to do this with passive components:

6thorederP2
a
6thorderP1

I used the application here, note the tweeter has to be reversed.
http://www.carstereo.com/help/Articles.cfm?id=13

I came across this useful article in my research:

http://www.torean.dk/artikel/Crossover.pdf

and this:

http://www.bcae1.com/xoorder.htm

The low pass filter might be useful in a TAD type crossover:

https://www.diyaudio.com/forums/multi-way/231594-quasi-optimal-crossover-efficiency-loudspeaker-system.html

The originator of the above thread has had second thoughts about it (post#6)

https://www.diyaudio.com/forums/multi-way/345388-crossover-time-delay-offset-horns-particularly.html

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