Horn crossovers are hard- this can help

badman · 10:30 PM

Find attached a handy CD EQ filter calculator. It's rough but does the job. If you use nominal impedance... be sure to notch out any spikes.

col · 29th December 2009, 11:42 PM

can you give more details on what it does and how to use it? At the moment I have opened it up in openoffice.org but thats about it.

col.

badman · 30th December 2009, 06:26 AM

It's pretty app-specific. You use a parallel cap/resistor combo to roll off the midband relative to the highs in a constant-directivity horn, which tends to have a "lump" response centered around 1-2k. So, you need to roll off the lump without throwing away the bottom end of the passband. I'll try to get a better version put together with 2nd order filter support (did some testing of this method tonight) and expanded displays (summed impedance, etc) later on this week.

SunRa · 31st December 2009, 03:10 AM

This can prove to be very useful, thank you!

29th December 2009, 11:42 PM	#2
col diyAudio Member Join Date: Feb 2008 Location: Melbourne, Victoria, Australia	can you give more details on what it does and how to use it? At the moment I have opened it up in openoffice.org but thats about it. col. __________________ http://www.minirig.org.au

30th December 2009, 06:26 AM	#3
badman Custom Title diyAudio Member Join Date: Sep 2003 Location: Sunny Tustin, SoCal	It's pretty app-specific. You use a parallel cap/resistor combo to roll off the midband relative to the highs in a constant-directivity horn, which tends to have a "lump" response centered around 1-2k. So, you need to roll off the lump without throwing away the bottom end of the passband. I'll try to get a better version put together with 2nd order filter support (did some testing of this method tonight) and expanded displays (summed impedance, etc) later on this week. __________________ I write for www.enjoythemusic.com in the DIY section. You may find yourself getting a preview of a project in-progress. Be warned!

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31st December 2009, 03:10 AM	#4
SunRa diyAudio Member Join Date: Aug 2004 Location: Romania	This can prove to be very useful, thank you!

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