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-   -   looking for Jordan JX92 (Pre ”S”)/ JX125 project (http://www.diyaudio.com/forums/full-range/57634-looking-jordan-jx92-pre-s-jx125-project.html)

Earplug Addict 20th May 2005 07:39 PM

looking for Jordan JX92 (Pre ”S”)/ JX125 project
 
I have an older pair of Jordan JX92 drivers (Pre “S”) that have lain fallow for quite a while looking for a box. I bought them because the idea of crossover design gave me the hives and a single driver speaker sounded simpler than multi drivers. This was probably mid to late 90’s and there was not that much single driver info out where I could see it. I also have a pair of JX 125’s that were slated for bass duties.

So on to the question, what do I do with them?
I was interested in speaker building (as differentiated from speaker design) before things like kids and jobs took all my spare time, but now frankly I am quite out of touch. My level of skill is “trained monkey” show me some plans and I can probably build something.
Music taste (if I can be so bold as to call it that) cuts a wide swath from acoustic Jazz to Ambient Groove/Electronica. Lately most of my audio input time is spent in front of a computer and I thought something along the lines of nearfield monitor with bass augmentation would be nice.
Any directions to look in (remember these are NOT the “S” model) or should I sell these to a deserving party and stick with my Tivoli radio setup :)
(And yes I searched but everything seems to be for the "S" model)

soongsc 21st May 2005 02:18 AM

I think there was not that much change between the S and non-S version. The VC cap has changed, but maybe not much more. I would think the S plans would work on the non-S versions as well. Has anyone experienced these?

The newer caps seem to provide better mid range dispersion. It sounds like the JX125 you have probably use the smaller VC caps too.

I think you will like them.

planet10 21st May 2005 07:30 AM

Re: looking for Jordan JX92 (Pre ”S”)/ JX125 project
 
You've the bits to make a killer speaker...

The 125 is now unobtainum...

With it on the bottom a small sealed, aperiodic, or even open baffle for the JX92 makes sense.... 1st order XO almost anywhere between 150 (active) up to (or higher) 1k...

dave

Earplug Addict 21st May 2005 06:28 PM

Jordan Specs (Old JX 92)
 
2 Attachment(s)
Ok a little research says these speakers were @1999-2000 production. When I bought them there was little talk of Jordan driver speakers, fast forward a few years and there are all these really cool speakers being created by some obviously talented people. I knew my limitations when I bought the drivers and the only thing that has changed since then is, I have better access to high quality woodworking equipment, and even less of a clue about designing speakers.

I searched through an old backup tape and found the specifications for the old JX92. If anybody is interested I also have what appears to be a fair amount of the material (if not all) from the EJ Jordon site Circa Apr 2000. Including About Ted Jordan, System Designs, JX 92 & Linear Array plans, System Design, and Technical specifications of the JX series (52, 62, 92, 125, 150).

I am not sure of the best format to attach these files so for the moment I will use PDF and hope it works.

Earplug Addict 21st May 2005 06:28 PM

JX 125 SPecs
 
2 Attachment(s)
Not sure how to post multiple attachments so bear with me here a few more times.

JX 125 Specs (Again Circa 2000)

Earplug Addict 21st May 2005 06:28 PM

Linear Array & JX 92 Enclosures
 
2 Attachment(s)
This is Ted's box design for the old 92's. A friend built me a crude pair of boxes based on these dimensions a couple of years a go and they seemed pretty clunky (and too leaky to get a good feel for how the drivers sounded), I was hoping for something a bit sleeker but at this point I just want to hear some good sound.

Again I appear to have the complete contents from thr EJ Jordan site @ Apr 2000, if people are interested.

Earplug Addict 21st May 2005 06:28 PM

System Design (Base & Crossover)
 
2 Attachment(s)
So the question is did anybody build these back in the day? Are there better designs out now for a kid/wife friendly, small room, nearfield environment (loaded Q, I know)? Can I mount those boxes 2-3 feet apart on my wall in front of my desk and get decent sound?

planet10 21st May 2005 07:14 PM

Re: System Design (Base & Crossover)
 
Quote:

Originally posted by Earplug Addict
Can I mount those boxes 2-3 feet apart on my wall in front of my desk and get decent sound?
Probably better than that.

What are you using for speakers in your hifi right now?

dave

Colin 21st May 2005 08:12 PM

Howdy

You have the makings of an excellent sat/sub system. The 92 differs from the 'S' version in being a little less efficient and, I believe, no sheilded magnet. The current TL design on the Jordan website should work ok if you want to run these from 45Hz up. I'd guess that the MLTL designs are more critical wrt driver parameters. Alternatively, build a nice, solid sealed box of around 8 litres and crossover to the JX125s at around 100Hz.

Regarding the 125s, you could run these sealed or use in a ported enclosure. Although the old Jordan site gave a design for two 125s per side in a 66 litre box, it never gave an enclosure for a single 125. I asked Ted for a one a while back and he suggested 33 litres with a vent of 2 inches diameter and 11 inches long. You could use the 92s without any form of crossover (let the enclosure roll off the bass) and put an inductor in series with the JX125s to roll them in. (I have a value for that from the old site, if you don't have it.)

GM has also produced a MLTL for this driver. The enclosure would be bigger than the BR - It depends how you want to go. Any of these options should tell the Tivoli where to get off ...

Colin

planet10 21st May 2005 11:17 PM

2 Attachment(s)
and here is a tapered triangulated TL for the JX125....

dave


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