Crossover design

Brewboy · 27th December 2008, 10:39 PM

Hi.

Could you take a look at the attached crossover and describe what the design intent is. The drivers shown are highly rated for value on the Zaph audio site and I was planning on using them on a project. The crossover is from the SB Acoustics site, I had an idea of what these drivers would require before I located this one and am curious how far off I am.

PeteMcK · 29th December 2008, 12:59 AM

looks like 3rd order, slightly tweaked on the woofer...

tinitus · 29th December 2008, 02:16 AM

Two exactly alike series inductors in series with each other, and with a paralel cap in between...not really sure what to think about that, but seems a bit strange and "bungling", and doesnt look like a result of measurements
I have tried lots of strange crossover things that seemed to work, but showed to have a certain flavour, and such things never seem to work properly in the long run, so I have learned to stick to basics, more or less

Brewboy · 31st December 2008, 11:11 PM

So are you saying that this is a bad design? If so, what would you suggest with these drivers?

Moondog55 · 31st December 2008, 11:29 PM

I vaguely remember a similar XO on B-139s in IMF speakers, but having stated that I can't find the page when I search the web.
I always wondered how it worked.

Jay_WJ · 31st December 2008, 11:51 PM

Quote:

Originally posted by Brewboy
Hi.

Could you take a look at the attached crossover and describe what the design intent is. The drivers shown are highly rated for value on the Zaph audio site and I was planning on using them on a project. The crossover is from the SB Acoustics site, I had an idea of what these drivers would require before I located this one and am curious how far off I am.

The design you attached doesn't use any baffle step compensation. Do you want to build a 2-way with the SB17NRX? I have a design with this midwoofer and Vifa DQ25SC. See this:

http://techtalk.parts-express.com/sh...d.php?t=207805

rcw · 1st January 2009, 02:14 PM

That looks like a first order shelving low pass filtera t about 1300Hz.
rcw

29th December 2008, 12:59 AM	#2
PeteMcK diyAudio Member Join Date: Feb 2002 Location: Sydney	looks like 3rd order, slightly tweaked on the woofer... __________________ ‘today… there lives alongside the twentieth century the tenth or thirteenth. A hundred million people use electricity and still believe in the magic power of signs and exorcisms” Trotsky

31st December 2008, 11:29 PM	#5
Moondog55 diyAudio Member Join Date: Jun 2007 Location: Norlane; Geelong: Victoria: Australia	I vaguely remember a similar XO on B-139s in IMF speakers, but having stated that I can't find the page when I search the web. I always wondered how it worked. __________________ QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"

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29th December 2008, 02:16 AM	#3
tinitus diyAudio Moderator Join Date: Nov 2005	Two exactly alike series inductors in series with each other, and with a paralel cap in between...not really sure what to think about that, but seems a bit strange and "bungling", and doesnt look like a result of measurements I have tried lots of strange crossover things that seemed to work, but showed to have a certain flavour, and such things never seem to work properly in the long run, so I have learned to stick to basics, more or less

31st December 2008, 11:11 PM	#4
Brewboy diyAudio Member Join Date: Dec 2008	So are you saying that this is a bad design? If so, what would you suggest with these drivers?

1st January 2009, 02:14 PM	#7
rcw diyAudio Member Join Date: Jul 2005 Location: sydney nsw	That looks like a first order shelving low pass filtera t about 1300Hz. rcw

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