Where to get decent inductors for 40 and 160 Hz crossovers?

[Guest]

I've found some nice 5 kHz crossover inductors in cassette players... I mean, magnetic heads. They perform surprisingly nice!
Now, what to use for 40 and 160 Hz?
PS filter chokes have huge capacitances that don't satisfy me... Any ideas?

I need one at 30 H, another one about 2.5 H

 

[burdij]

There's always Madisound . . .

http://www.madisound.com/catalog/index.php?cPath=404_20

Did you really mean H, rather than mH? Usually the values for crossovers are in the milliHenry range.

 

[Guest]

Yes, I mean Henries.



I've found already how to make nice 160 Hz crossovers using primaries of small power trannies: for LPF to use a Q-adjusting pot in series with an inductor, for HPF to use a parallel one to it, though an HPF will require more current capability from a driver, a simple opamp may not fit...

Now, I need for 40 Hz... Something around 10H...


Thank you for the link! I'll go now and check if they have something affordable...

 

[skipwave]

Check with Max, aka ioaudio, he can do 10H.

http://groupdiy.com/index.php?topic=23964

 

[Guest]

[quote author="skipwave"]Check with Max, aka ioaudio, he can do 10H.

http://groupdiy.com/index.php?topic=23964[/quote]

Oops.... No, thank you... I'll better continue using active filters to divide between woofers and subwoofers: it is much cheaper, and I think distortions below 40 Hz in subwoofers and between 40 and 160 Hz in woofers are not so audible like on higher octaves. At least, I don't hear a binaural effect from subwoofer under a floor which throat opens up near a wall to the left from a coach, I assume it is because no higher frequencies going from it are audible.