Fostex 126e in the 108-sigma enclosure - 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 29th November 2005, 04:49 PM   #1
santiu is offline santiu  United States
diyAudio Member
 
Join Date: Feb 2005
Location: Los Angeles
Default Fostex 126e in the 108-sigma enclosure

Hey everybody,

So I was about to order up some 108-sigmas and make the fostex recommended BLH, but then I saw that Ed Schilling has switched from the 108-sigmas to the 126e in his horn and has nothing but positive comments about it.

I was really excited to build the 108-sigma recommended enclosure (I like how it looks, and it's about the size I'm looking for). Do you guys think it would be a bad idea to just plop a 126 in the 108 enclosure? All Ed did to put the 108's in his horn was to dampen the basket and put some foam in the compression chamber. So I was hoping that maybe I could do something similar and get good results (hopefully better results than just using the 108 in the same enclosure).

what do you guys think?

thanks a bunch...
  Reply With Quote
Old 29th November 2005, 09:52 PM   #2
diyAudio Member
 
Scottmoose's Avatar
 
Join Date: Mar 2005
Location: UK
First time I've heard the phrase 'just' the FE108ESigma...

Seriously though, it could work, though you'd likely need to do a fair bit of tweaking. My gut suspicion is that the compression-chamber could be too small in the Sigma enclosure though. I believe Eds Horns are based upon the Buschorn folding (which version I'm not sure), which I suspect has a bigger chamber. However, as the new FE126Es (if you can even get hold of them, I believe Ed has got the world monopoly on these new drivers at the moment!) aren't too expensive, it wouldn't be a terribly costly experiment to go pear shaped, and you could easily revert back to the original plan of using the Sigmas if it didn't work out. (which would then allow you to go crackers at a later date, and indulge in those over-priced, but spectacular brass-rings.). I like the Fostex Factory Sigma horns too -they're much better than people often believe (look good as well don't they).

I haven't heard the new FE126E, though there's lots of good comments emerging, and I've a few ideas kicking around that I'm looking into refining when I get a moment.

Best
Scott
__________________
Community site www.frugal-horn.com Commercial site www.wodendesign.com
  Reply With Quote
Old 1st December 2005, 04:22 PM   #3
diyAudio Member
 
Join Date: Nov 2005
Location: Sweden
Is there a new FE126ES coming out? Does anyone know any more about this?

I am also planning to build a pair of BH2, using the 108ES. Perhaps I should wait a bit for this new speaker, if it is reality

Michael
  Reply With Quote
Old 9th December 2005, 04:42 PM   #4
diyAudio Member
 
Join Date: Jul 2004
Location: West Midlands, England
I've just applied the compression chamber equation from the Full Range Driver website:

http://melhuish.org/audio/horndesign.html

to see what it came up with.
Based on the parameters for the 108ez, it suggests a 2.4l compression chamber for a 77Hz cut-off horn, and 2.9l for the 126e.

The actual chamber volume (not accounting for driver) in the Fostex recommended design is 1.53l, so at first glance it looks as though the calculation is not useful.

However, when I scaled the volumes so that the result for the 108ez driver matches with the fostex design, the 126e result changes to 1.8l, which is almost exactly the volume you get if you remove the 'packing pieces' from the chamber!

Does this suggest hope for trying the 126e in this design, or am I being hopelessly simplistic in my thinking?

Dave
  Reply With Quote
Old 9th December 2005, 06:28 PM   #5
diyAudio Member
 
Join Date: Nov 2005
Location: Sweden
I think it looks quite promising. I am planning to use 126 E also, very much based on the very positive reviews from Ed Schilling

You will probably have to dimenson the chamber by trial and error. The BH enclosure has quite a big chamber so it is not so difficult to make it smaller by blocking it off or putting wood blocks in there

Michael
  Reply With Quote
Old 9th December 2005, 09:05 PM   #6
chrisb is offline chrisb  Canada
diyAudio Member
 
Join Date: Aug 2002
Location: victoria BC
Default which BH?

Ed has released photos of the innards of The Horn"ette", that are artfully enough composed so as to not reveal the entire story, but cleary indicate the folding is "based" on the original BH (MkI) design.

Of course it has been scaled up a bit in overall dimensions, and there are other secrets that have yet to be reverse engineered. (not for the lack of trying by many a DIY - clonehack )


Oh yeah, if you're situated in North America, try and buy a new pair of these drivers right now.
  Reply With Quote
Old 10th December 2005, 07:33 AM   #7
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Default Re: which BH?

Quote:
Originally posted by chrisb
Oh yeah, if you're situated in North America, try and buy a new pair of these drivers right now.
I think i bought the last 4 -- 2 for me & 2 for Chris

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 10th December 2005, 01:32 PM   #8
diyAudio Member
 
Join Date: Apr 2002
Location: Cayman Islands
Remember Solen in Canada is also a Fostex dealer and may have them in stock. Its not just Madisound anymore (and I understand Madisound is out of stock at the moment).

Andrew
__________________
None of us are leaving this world alive. Enjoy it responsibly as you may.
  Reply With Quote
Old 10th December 2005, 08:16 PM   #9
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Quote:
Originally posted by Andrewbee
Remember Solen in Canada is also a Fostex dealer and may have them in stock.
The 4 i got were the last 4 Solen had Pricey thou... Solen's dealer price is more than Madisound's retail....

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  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
best enclosure for fostex 208 sigma? dondiba Full Range 71 6th December 2013 10:31 PM
108E Sigma vs. 126E cervelorider Full Range 14 3rd March 2009 07:43 PM
Fostex 126e or 127e germpod Full Range 71 9th May 2008 07:26 PM
Fostex FE 126E HoJ Multi-Way 9 29th August 2007 04:42 PM


New To Site? Need Help?

All times are GMT. The time now is 02:31 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