Impedance Phase Plot Question

[Marzen]

What do I need to be aware of when viewing the impedance phase plot when modeling a crossover network?
Thanks,
Ward

[Paul H]

Depending on the amplifier(s) and/or receivers you're using, you may need to be concerned with minimum impedance. Anything below 4 Ohms is going to start putting more of a strain on some amps if you push the speakers hard.

If you look closely at the impedance curves, assuming they're accurately measured and represented, as opposed to smoothed-over marketing material, you may see little humps or glitches in an otherwise smooth curve. These tend to be indicators of problems at those frequencies with cone-breakup, system resonance or other distortion-inducing issues.

Paul

[Marzen]

Thanks Paul. I can tame the rise/fall fairly well. I was more interested in the impendance phase plot, I don't think it looks terribly reactive, but then I'm basing that on other designs I've looked at. I wanted to post a graph but I can't seem to open the project file looking the same as I left it in Sound Easy. I also wanted to post some measurements of a change in the Modula MTM tweet network suggested by Jon, but I kept getting target level errors while running sweeps. It's been one of those days :roll:
Thanks,
Ward