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Old 22nd November 2002, 12:24 AM   #1
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Default Newbie crossover impedance question

There's one thing that I have never understood about crossovers (ok there's lots of things but this is a big one). Forgive my naivete but I have to ask it.

If I have an N ohm woofer crossed over to an M ohm tweeter what is the impedance of the entire speaker as a system? I'm assuming that it must depend on the type of crossover but I dont know. How do you predictively calculate this?
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Old 22nd November 2002, 01:16 AM   #2
f4ier is offline f4ier  Australia
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Try Speaker Workshop, Crossover Simulator and JeffB's PCDC which you can download from the FRD Group's site. Work with measured impedance curves rather than calculated curves.

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Old 22nd November 2002, 07:58 AM   #3
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Default Re: Newbie crossover impedance question

Originally posted by Xylenz
If I have an N ohm woofer crossed over to an M ohm tweeter what is the impedance of the entire speaker as a system?
The nominal impedance of a speaker is just that, nominal. In a situation like this the nominal impedance would probably be N ohms.

The actual impedance -- assumming a well behaved XO -- is a spiral in a 3-space with axes frequency, magnitude, & phase.

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