New MJK Baffle Article

Nelson Pass · 19th September 2007, 08:27 PM

There's a great new MJK article on baffles and crossovers
focusing on full-range drivers:

http://www.quarter-wave.com/General/

Netlist · 19th September 2007, 08:34 PM

Link doesn't work, Nelson.
Was this the one you had in mind?

http://www.quarter-wave.com/General/..._Articles.html

/Hugo

Vix · 19th September 2007, 08:50 PM

Or this?

http://www.quarter-wave.com/General/OB_Design.pdf

A very nice article

Nelson Pass · 19th September 2007, 09:11 PM

Yes, thank you. Everytime I don't check my work....

Brett · 20th September 2007, 02:07 AM

Very good article, as Martin's usually are.
I'd still go active, but it was very informative and answered a couple of questions I had re OB design.

happy.gringo · 20th September 2007, 02:46 AM

I wonder if it could be built and then different full range drivers tried on top, as long as they are 8 ohms and about 90db?

planet10 · 20th September 2007, 04:03 AM

I just read that this afternoon. Another excellent treatise,

The graphs showing hoe the driver response, baffle response and XO response all work together to get a flat response are particularily illustrative.

dave

britbug · 20th September 2007, 04:27 PM

Yes, very cool study, as always.
I wonder if it would be possible to use a JX92S instead of the fostex, and so crossover at lower frequencies? That could be a very desirable speaker.
Graham

planet10 · 20th September 2007, 05:20 PM

Quote:

Originally posted by britbug
I wonder if it would be possible to use a JX92S instead of the fostex, and so crossover at lower frequencies?

The study shows that each combination of mid/tweeter and bass driver needs to be considered together with the baffle as a system, and that changing any drivers requires a reconsideration of all the parameters of the system.

I do expect you would have an easier job of substituting a similar efficiency mid/tweeter. Adapting the sytsem for active XO would give even more flexibility with the mid-tweeter but at nominally higher cost (but when one considers that many diyers have more than a single amp kicking around, it may actually take less cash flow)

dave

Scottmoose · 20th September 2007, 05:24 PM

Sensitivity of the Jordan is a bit lower at 88db, and the parameters are different, so as Dave says, you'd have to design something for it from the ground up. There's no reason why that's not possible though. I suspect the Jordan would work rather well run on a baffle, with a suitable woofer in support.

Yet another superb paper on design; one of the best available. Actually, I'd call it the best, period, given that Linkwitz's commentaries, superb though they are, have a somewhat different purpose. Thank you, Martin.

19th September 2007, 08:27 PM	#1
Nelson Pass The one and only Join Date: Mar 2001	New MJK Baffle Article There's a great new MJK article on baffles and crossovers focusing on full-range drivers: http://www.quarter-wave.com/General/

20th September 2007, 04:03 AM	#7
planet10 frugal-phile(tm) diyAudio Moderator Join Date: Oct 2001 Location: Victoria, BC, NA, Sol III Blog Entries: 4	I just read that this afternoon. Another excellent treatise, The graphs showing hoe the driver response, baffle response and XO response all work together to get a flat response are particularily illustrative. dave __________________ community sites t-linespeakers.org, frugal-horn.com ........ commercial site planet10-HiFi p10-hifi forum here at diyA

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19th September 2007, 08:34 PM	#2
Netlist diyAudio Moderator Join Date: Jan 2003	Link doesn't work, Nelson. Was this the one you had in mind? http://www.quarter-wave.com/General/..._Articles.html /Hugo

19th September 2007, 08:50 PM	#3
Vix diyAudio Member Join Date: Nov 2003 Location: Somewhere on Planet Earth	Or this? http://www.quarter-wave.com/General/OB_Design.pdf A very nice article

19th September 2007, 09:11 PM	#4
Nelson Pass The one and only Join Date: Mar 2001	Yes, thank you. Everytime I don't check my work....

20th September 2007, 02:07 AM	#5
Brett diyAudio Member Join Date: Jan 2002	Very good article, as Martin's usually are. I'd still go active, but it was very informative and answered a couple of questions I had re OB design.

20th September 2007, 02:46 AM	#6
happy.gringo diyAudio Member Join Date: Sep 2005	I wonder if it could be built and then different full range drivers tried on top, as long as they are 8 ohms and about 90db?

20th September 2007, 04:27 PM	#8
britbug diyAudio Member Join Date: Nov 2005	Yes, very cool study, as always. I wonder if it would be possible to use a JX92S instead of the fostex, and so crossover at lower frequencies? That could be a very desirable speaker. Graham

20th September 2007, 05:24 PM	#10
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	Sensitivity of the Jordan is a bit lower at 88db, and the parameters are different, so as Dave says, you'd have to design something for it from the ground up. There's no reason why that's not possible though. I suspect the Jordan would work rather well run on a baffle, with a suitable woofer in support. Yet another superb paper on design; one of the best available. Actually, I'd call it the best, period, given that Linkwitz's commentaries, superb though they are, have a somewhat different purpose. Thank you, Martin.

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