Second Generation Jordan JX92S MLTL Designs - Page 2 - diyAudio
Go Back   Home > Forums > Loudspeakers > Full Range

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 26th December 2009, 03:06 PM   #11
diyAudio Member
 
R-Carpenter's Avatar
 
Join Date: Oct 2007
Location: Brooklyn Navy Yard
Hi Jim. Would you recommend any additional bracing to a cabinet of this size? If so, would it necessarily have to a longitudinal brace not to interfere with TL loading?
Also, is there a tmm version of this loudspeaker? I am thinking myself of using a secondary xj96 to add +6db down around 500hz. Of cause that would affectively requier internal volume change and crossover modifications, so it's just an idea at this point.
Best, Roman.
  Reply With Quote
Old 27th December 2009, 02:49 AM   #12
diyAudio Member
 
Join Date: Jun 2003
Location: Tennessee
R-Carpenter,

I use a brace around the inside (all four sides) of my MLTL cabinet. The brace is implemented with 0.75 inch square dowel stock. This brace is located below the JX92S. It strengthens the cabinet in this area of the enclosure plus it provides a ledge for the stuffing which extends from below the driver to the top of the box.

No TMM version exists for this design but you would double the box cross-sectional area if you used a second JX92S inside the box. I've had success with a bipolar style MLTL speaker with other full range drivers though I have not yet incorporated a tweeter into a bipolar design. Essentially the bipolar version is a double size box with one forward and one rear firing driver. Either a TMM or a bipolar variant with a tweeter would be a new speaker design vs. just modification of the existing design. Essentially the rear driver adds 6 dB to counter the normal baffle step effect.

Jim
  Reply With Quote
Old 29th December 2009, 02:19 PM   #13
Colin is offline Colin  United Kingdom
diyAudio Member
 
Join Date: Aug 2003
I notice the Jordan USA website has a little more detail online now, which helps discriminate between the three designs (advantages of each and their design aims). I suspect the 35 will be the most popular but the 31 look interesting for a small, discrete floorstanding MLTL.

Designs
  Reply With Quote
Old 3rd January 2010, 10:19 AM   #14
lydan01 is offline lydan01  Australia
diyAudio Member
 
lydan01's Avatar
 
Join Date: Jul 2007
I knocked together the 35" version over the holidays to replace my VTL... While I haven't listened too much yet, its definitely leagues ahead to my ears in the bass department.

These were built using the narrower front baffle Jim recommended on the first page of this thread.

I was going to order a pair of Aurum Cantus G2Si to give those a shot but can't seem to get onto Parts Express... I'm tempted to try the G3Si that I already have - from memory they're a little more sensitive. Any thoughts on whether its a viable substitute?

Last edited by lydan01; 3rd January 2010 at 10:19 AM. Reason: Typo...
  Reply With Quote
Old 3rd January 2010, 11:07 AM   #15
Colin is offline Colin  United Kingdom
diyAudio Member
 
Join Date: Aug 2003
Hi Lydan - did you use the BSC with the 35 design? I've found it isn't needed with the VTL but found it helped with the original 48 MLTL.
  Reply With Quote
Old 3rd January 2010, 11:11 AM   #16
diyAudio Member
 
Join Date: Jun 2003
Location: Tennessee
lydan01,

Great to hear that you like the results. I suggest that you listen to the just the Jordan driver full range for a while. Perhaps try a baffle step circuit of a paralleled inductor and resistor placed in series with the positive terminal feeding the driver.

Hold out for the G2si.

Jim
  Reply With Quote
Old 3rd January 2010, 11:19 PM   #17
lydan01 is offline lydan01  Australia
diyAudio Member
 
lydan01's Avatar
 
Join Date: Jul 2007
Quote:
Originally Posted by Colin View Post
Hi Lydan - did you use the BSC with the 35 design? I've found it isn't needed with the VTL but found it helped with the original 48 MLTL.
I did try a very rough BSC when I first ran them at my parents place but the values of the components were only ballpark. The plan is to order some new bits today to try.

However, after listening again this morning at my apartment I am thinking that they might not need the BSC in this location... I'll try anyway and also have a mess around with the stuffing.
  Reply With Quote
Old 3rd January 2010, 11:26 PM   #18
lydan01 is offline lydan01  Australia
diyAudio Member
 
lydan01's Avatar
 
Join Date: Jul 2007
Quote:
Originally Posted by Jim Griffin View Post
lydan01,

Great to hear that you like the results. I suggest that you listen to the just the Jordan driver full range for a while. Perhaps try a baffle step circuit of a paralleled inductor and resistor placed in series with the positive terminal feeding the driver.

Hold out for the G2si.

Jim
I'm very happy with the sound of the Jordan by itself - but I'm keen to hear how the ribbons sound too. Unless I can find a local source for the G2Si's it'll take ages for them to arrive anyway... is it just me or is the Parts Express site down at the moment?

At my parents place where I first tested them the BSC was definitely needed and they were still a bit bass shy... However, now they're sitting in my apartment the bass is romping through without any BSC attached - I will still experiment with this though.
  Reply With Quote
Old 4th January 2010, 02:05 AM   #19
diyAudio Member
 
Join Date: Jun 2003
Location: Tennessee
lydan01,

Parts Express has had some web site problems the last week or so. Keep trying as P-E seems to be back on-line by now. At one time another Aurum Cantus source was Creative Sound Solutions in Canada. They are at: Creative Sound Solutions - Loudspeakers, Parts and DIY Speaker Kits

Jim
  Reply With Quote
Old 4th January 2010, 03:35 AM   #20
lydan01 is offline lydan01  Australia
diyAudio Member
 
lydan01's Avatar
 
Join Date: Jul 2007
Quote:
Originally Posted by Jim Griffin View Post
lydan01,

Parts Express has had some web site problems the last week or so. Keep trying as P-E seems to be back on-line by now. At one time another Aurum Cantus source was Creative Sound Solutions in Canada. They are at: Creative Sound Solutions - Loudspeakers, Parts and DIY Speaker Kits

Jim
Thanks Jim - looks like the P-E website is still a bit flaky, at least from here. And, CSS have as much stock of the Aurum Cantus as the local reseller. Seem's like it'll be straight Jordan's for awhile yet. Not a bad thing...
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Jordan JX92S MLTL-48 Front Baffle Question batdan Full Range 2 2nd December 2009 08:32 AM
First Impression: GM's Jordan JX92S MLTL Speaker abpea Full Range 147 7th October 2009 11:00 PM
Aurousal MLTL using paired JX92s Nardis Full Range 31 22nd January 2009 12:46 PM


New To Site? Need Help?

All times are GMT. The time now is 02:05 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2