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Old 19th September 2007, 09:27 PM   #1
Nelson Pass is offline Nelson Pass  United States
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New MJK Baffle Article
Default 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/

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Old 19th September 2007, 09:34 PM   #2
Netlist is offline Netlist  Belgium
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Link doesn't work, Nelson.
Was this the one you had in mind?

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

/Hugo
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Old 19th September 2007, 09:50 PM   #3
Vix is offline Vix  Yugoslavia
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Or this?

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

A very nice article
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Old 19th September 2007, 10:11 PM   #4
Nelson Pass is offline Nelson Pass  United States
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New MJK Baffle Article
Yes, thank you. Everytime I don't check my work....

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Old 20th September 2007, 03:07 AM   #5
Brett is offline Brett
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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.
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Old 20th September 2007, 03:46 AM   #6
happy.gringo is offline happy.gringo  Costa Rica
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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?
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Old 20th September 2007, 05:03 AM   #7
planet10 is offline planet10  Canada
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New MJK Baffle Article
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
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Old 20th September 2007, 05:27 PM   #8
britbug is offline britbug  United States
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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
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Old 20th September 2007, 06:20 PM   #9
planet10 is offline planet10  Canada
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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)

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Old 20th September 2007, 06:24 PM   #10
Scottmoose is offline Scottmoose  United Kingdom
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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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