Ferrite Coils for passive crossovers?

[Norm Dresner]

What would be the likely result of using a ferrite-core coil in a
loudspeaker passive crossover instead of an air-core? I'm interested in
both the theoretical and practical aspects of this and was hoping that
someone would know and save me the trouble of winding some coils just to
find out.

TIA
Norm

 

[Tim Wescott]

Norm Dresner wrote:

What would be the likely result of using a ferrite-core coil in a
loudspeaker passive crossover instead of an air-core? I'm interested in
both the theoretical and practical aspects of this and was hoping that
someone would know and save me the trouble of winding some coils just to
find out.

TIA
Norm

The obvious thought is that the ferrite would saturate and create weird

harmonics, or that you'd have problems with the repeatability of the
inductor value and inductance changes with temperature.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com

 

[Dave VanHorn]

The inductance varies with current, so you'll see your cutoff frequencies
dithering with the bass.
I don't know if that would be audible or not, but given what's claimed to be
audible in those circles, it wouldn't surprise me.

--
KC6ETE Dave's Engineering Page, www.dvanhorn.org
Microcontroller Consultant, specializing in Atmel AVR