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RE: Hiraga Altec crossover question

Posted by bwaslo (M) on July 3, 2016 at 11:59:47

In Reply to: Hiraga Altec crossover question posted by horny on July 2, 2016 at 15:47:06:

On the LF driver, it's a 12dB/octave slope lowpass. On the HF driver, it's a 12dB/octave highpass, with a broad notch at about 2kHz. Those are the ELECTRICAL responses, by the way, the drivers themselves will add a couple more 6dB/octave slopes as well, so the overall crossover order is probably around 4th or more.

"where is the 140 ohm for?" it just makes the load on the highpass look a little more resistive.

"and the 10 ohm 20 w?" Same, for the load on the notch (and the highpass). Also provides a little attenuation.

"i untherstand that the 6,6 mH coil 24 ohm resistor and 0,82cap parallel is a notch filter
to get some more treble out of the horns
or taming some mids i don't now."
No idea why, but it actually seems a pretty screwy way to go about it! 6.6mH inductors are expensive and not very well behaved. I'd think an RC combo could be configured to do the same thing cheaper and better (but I'm not the designer, so don't know his thought processes that led to this).
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Make easy high performance diffusors:-->http://www.libinst.com/diffusers/Depot_Diffuser.html

Horn Design Spreadsheet:--> http://libinst.com/SynergyCalc/

SmallSyns:-->http://www.diyaudio.com/forums/multi-way/292379-s

Edits: 07/03/16

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