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Multi-Way Conventional loudspeakers with crossovers

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Old 4th January 2003, 05:59 PM   #11
BrianGT is offline BrianGT  United States
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I was planning on using Baltic birch inside and out. I think that it will help for rigidity. I was planning on using .75" thick throughout (19mm) and then double thickness on the sides and back, then 1" on the front.

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Old 4th January 2003, 06:03 PM   #12
zeno is offline zeno  Europe
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Sounds 'steady'...

It is actually a very female friendly speaker and that's why I will give it a try in 2003. New years' resolution...

Marc
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Old 4th January 2003, 11:00 PM   #13
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The JX92 is getting many, many accolades.

For a TL for these, i'd run some models using Martin King's software. The Jordan design (very similar to a Jordan-Watts design i did in 1976) seems a bit shy on box volume to get the most out of the driver.

Rick Shulz is using the JX92 as a design example in his upcoming alphaTL article in audioXpress.

dave
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Old 4th January 2003, 11:49 PM   #14
Variac is offline Variac  United States
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How about using the Oris horn/ Avant Garde horn idea with the Jordans? The advantage would be getting the efficiency from 88 db up to maybe 95 db?

Here's info on the Orris parts click around on the site and there is a lot of info:

http://www.welbornelabs.com/oris.htm

There is info online about designing your own tractrix horns, which is the most expensive part

I'm interested in opinions




Dave: I ordered my Fostex FE 208 EZ drivers yesterday, they might work well in an Oris type horn also?
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Old 5th January 2003, 01:06 AM   #15
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Quote:
Originally posted by Variac
[B]How about using the Oris horn/ Avant Garde horn idea with the Jordans? The advantage would be getting the efficiency from 88 db up to maybe 95 db?
But they would still be 88 dB in the mid & HF bands.

Quote:
Dave: I ordered my Fostex FE 208 EZ drivers yesterday, they might work well in an Oris type horn also?
They might well do. You should go look thru Bert's Forum and see if it has been asked already and if not you can ask the man himself.

dave
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Old 5th January 2003, 03:39 AM   #16
Variac is offline Variac  United States
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ohhhhhhhhhhhhhh-now I get it

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Old 5th January 2003, 06:13 AM   #17
BrianGT is offline BrianGT  United States
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Quote:
Originally posted by planet10
The JX92 is getting many, many accolades.

For a TL for these, i'd run some models using Martin King's software. The Jordan design (very similar to a Jordan-Watts design i did in 1976) seems a bit shy on box volume to get the most out of the driver.

Rick Shulz is using the JX92 as a design example in his upcoming alphaTL article in audioXpress.

dave
Dave,

Any clue on when that aXp issue is coming out?

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Old 5th January 2003, 06:35 AM   #18
BrianGT is offline BrianGT  United States
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Quote:
Originally posted by planet10
The JX92 is getting many, many accolades.

For a TL for these, i'd run some models using Martin King's software. The Jordan design (very similar to a Jordan-Watts design i did in 1976) seems a bit shy on box volume to get the most out of the driver.
I am trying to do some mathcad simulations. I have all of the parameters except for the voice coil inductance for the jx92s. Do you have any clue where I can find this? It isn't listed on the Jordan JX92S spec page ...

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Old 5th January 2003, 08:33 AM   #19
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Quote:
Originally posted by BrianGT
I am trying to do some mathcad simulations. I have all of the parameters except for the voice coil inductance for the jx92s. Do you have any clue where I can find this? It isn't listed on the Jordan JX92S spec page ...
It is not really a critical spec. You can pretty much get away with Vas, Qt, and Fs (i think).

I have also seen a geometric method of estimating it from the impedance curves. I can't remember where.

The date on the aXp article is unknown at this time. I hope it is soon.

dave
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Old 7th January 2003, 07:36 PM   #20
LBHajdu is offline LBHajdu  United States
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I to am planning on building a pair of the Jordan JX92S TL speakers based off the reference design on the Jordan website at some point.

One thing that can be done to improve the TL is to remove the sharp bands from the line. I have drawn a picture of the type of change I’m talking about. A very small compensation in volume may or may not be needed.

If as BrianGT says “the Essence is far, far superior” then I should very much like to know a little more about it. Perhaps someone who owns an Essence could with the aid of a mirror look up the transition line of the Essence to see if at least the last 1/3 of the tl is the same and report back on what they see.

Leve
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