Any enclosure ideas for the "new" JX92S?

Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Jump to Latest
C

Colin

Member
Joined 2003
ejjordan.co.uk
I've been in touch with Ted Jordan and alerted him to Zaph's findings, in case anything is going adrift with current units.

The first thing he noticed was that the web published spec was out on resistance and should read 6 ohms, not 4.5. Department of mea culpa as that typo was probably mine when I worked on the site. The published spec will be updated.

Ted is going to pull out a recent sample JX92S and check the spec. I'll post here when I hear from him. (Ted prefers not to join in the forums.)
 
GM

GM

Member
Joined 2003
Colin said:

The first thing he noticed was that the web published spec was out on resistance and should read 6 ohms, not 4.5.
Click to expand...

If the other specs are 'correct', then the slightly increased BL in theory is an improvement, though I seriously doubt it would be audible in-room with any TL, MLTL alignments and my SWAG not even the tiniest sealed ones.

Anyway, looking forward to his thoughts/findings on the subject.

GM
 
GM

GM

Member
Joined 2003
A Sanchez said:

I hope the discrepancies will have no siginificant impact on, for example, GM's MLTLs dimensions.
Click to expand...

Worst case scenario based on my comments here is you may want to either increase the vent length some or add a bit of stuffing inside the existing one to suit, though I imagine had these specs discrepancies not been noted you would be pleased with the design as is since the room dominates the BW they affect: http://www.diyaudio.com/forums/showthread.php?postid=1465991#post1465991

GM
 
gmilitano

gmilitano

Member
Joined 2004
diyAudioProjects.com
Colin said:
I've been in touch with Ted Jordan and alerted him to Zaph's findings, in case anything is going adrift with current units.

The first thing he noticed was that the web published spec was out on resistance and should read 6 ohms, not 4.5. Department of mea culpa as that typo was probably mine when I worked on the site. The published spec will be updated.

Ted is going to pull out a recent sample JX92S and check the spec. I'll post here when I hear from him. (Ted prefers not to join in the forums.)
Click to expand...

Is there any update on this? I had emailed them on March 25 and sadly there has been no response.

Perhaps I am thinking about this too much.

If you take the specified Qes = 0.58 and Qms = 1.35, I calculate Qts = 0.406 which matches the specified Qts = 0.4.

However, using the specified Fs = 45 Hz and Vas = 15.28, I calculate SPL = 85.84. Jordan has specified 88.

Is this another typo, or is it possible that have they used a specified SPL to calculate Vas?!

Am I making too much out of this? Is a 30% variation Qts no big deal?

Also, note that their impedance plots are only from 30 Hz to 10kHz. Is this why they have Re = 6 and others are measuring closer to 5 ohms?
 
C

Colin

Member
Joined 2003
ejjordan.co.uk
No update received yet. Jordan commercial business is handled by EAD or the distributors. Ted is mostly consultancy now. As soon as I hear anything from Ted I'll post here.

This month's HiFi News review of the Aurousal A1 mk 2 seems to fit with the Jordan sensitivity, as far as I can tell. The mk 2 features the recommended BSC for the 8 litre enclosure so loses 3-4dB from the raw Jordan spec.
 
J

jkeny

Banned
Joined 2007
As per the title of this thread, I'm embarking on an enclosure that has not been tried before with the JX92S drivers, AFAIK (mine are not from the GB) - see the thread here: http://www.diyaudio.com/forums/showthread.php?s=&threadid=119903

The final version I am having built, by the kindness of WoddturnerFran (as the name suggests he's a dab hand at wood & just finished some Fonkens), is this one: http://spiralspeaker.web.fc2.com/aaaspeaker/extra/engag180z/eng-ag180z.html

These cabinets are originally for the Fostex FE126E drivers & I'm wondering what, if any, changes to dimensions should be made?

Any comments/changes appreciated before wood is cut,etc?
 
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Top Bottom