Stacking crossovers, Active to Passive

I'm not sure why, but I'm interested in the idea of stacking different types of crossovers and how each type would affect one another.  I found a thread that began to touch upon the topic, but no one ever went anywhere with it before it was closed.

I know that if you stack two 12dB active crossovers, the slopes add together and become 24dB.  I also know that the frequency will shift downward.  Two 80Hz crossovers become a 65Hz crossover. 

I was wondering if passive crossovers acted in a similar fashion to one another.  I am also interested in how an active crossover might affect a passive crossover.

If anyone has any ideas on this subject, I'm all ears.  I'd alslo appreciate any resources including other threads that might touch upon this paticular topic.  I checked a few, but only one touched upon the topic and it never went anywhere and is currently closed.  I have gathered what information is available to me through "The Car Stereo Cookbook."

Once again, all help and input is very much appreciated!!

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...typically, I just run whatever I randomly pick up off the floor.
1995 Ford Ranger Supercab
MECA member
Team CSS

wormy:

Buy "The Loudspeaker Cookbook" by Vance Dickason if you are interested in crossovers.

Read the relevant material at https://www.bcae1.com/

I'm not sure if either of these sources discuss stacking crossovers, but should give you some more information regarding crossover basics.

I don't think stacking complex passives would be a good idea. You will end up creating a network with a result you did not intend, I think.

Adding an active to a passive or 2 actives, on the other hand, is likely much more predictable.

Unless you're interested in taking some EE classes, which I'll assume you aren't, and you just want to try some ideas out for your own pleasure, I would try modeling crossovers with WinISD.

You can get started with the sticky tutorial at the top of this forum that Stevdart authored. I might have thrown in some information as well.


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New Project: 2003 Pathfinder

Actually, I already own "The Loudspeaker Cookbook by Vance Dickason" and I do intend to pursue a career in electrical engineering and wind up in the transducer engineering field with the electrical engineering background as well as an aerospace engineering background.  I don't think I'd really want to stack passive crossovers much less actually use one for anything more than the tweeter.  I'm just interested in understanding little tid bits about them.

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...typically, I just run whatever I randomly pick up off the floor.
1995 Ford Ranger Supercab
MECA member
Team CSS

Well, I'd probably just recommend that you get started in a university E.E. program. Are you looking at schools now?

My wife is an IE and I'm a CIS grad, but we always had EE friends taking filter design classes and the such.

They seemed like great classes and seemed to teach our friends how to actually analyze filter networks from scratch, rather than just use rules of thumb and hobbyist books.

Computers were my thing at the time, although I now wish I would have enrolled in more solid electronics courses or picked a double major. Engineering Physics I & II gave me some rudimentary tools for understanding electronics with the aid of references, but I still have more questions than answers when it comes to things electronic.

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New Project: 2003 Pathfinder