Impedance v.s. frequency

maylar · 5th January 2005, 01:40 PM

Does the impedance of a speaker change drastically at frequencies higher than it can play?

I'm wondering how a simple coaxial with just a capacitor crossover for the tweeter stays anywhere near a constant impedance over frequency.

Jim York · 5th January 2005, 01:59 PM

It does change, the woofer voice coil inductance raises impedance drastically as frequency rises, one reason why the woofer response falls off. The impedance of the woofer section of the coax driver goes up, but the impedance of the tweeter does not, so system impedance remains more or less constant.

5th January 2005, 01:40 PM	#1
maylar diyAudio Member Join Date: Jun 2003 Location: Connecticut	Impedance v.s. frequency Does the impedance of a speaker change drastically at frequencies higher than it can play? I'm wondering how a simple coaxial with just a capacitor crossover for the tweeter stays anywhere near a constant impedance over frequency. __________________ dave

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5th January 2005, 01:59 PM	#2
Jim York Banned Join Date: Oct 2004	It does change, the woofer voice coil inductance raises impedance drastically as frequency rises, one reason why the woofer response falls off. The impedance of the woofer section of the coax driver goes up, but the impedance of the tweeter does not, so system impedance remains more or less constant.

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