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officeboy 27th January 2004 06:04 PM

Help me build a semi-active crossover
I've been searching for a few hours, and I can't find anything simple enough for what I need.
I want to make something very similar to these fmod crossovers

The only designs I can find for active type crossovers include opamps and that seems much too complicated.

Essentially I want to build a passive low pass crossover for a line out I guess. But since I donít know the speakers resistance I canít calculate things like inductors etc.

Can anyone point me in the right direction?

tiroth 27th January 2004 06:07 PM

You need to know the input impedance of the following stage (probably an amp in your case). Apply the same equations using this resistance.

officeboy 27th January 2004 06:18 PM

You always find it yourself after a post right?

Thatís got just what I was looking for.

Basically the same thing that fmod does.

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