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 15th October 2009, 01:26 PM   #101
diyAudio Member
 
Join Date: Jan 2007
Check this page: MathCad Computer Models : Upgraded Versions
  Reply With Quote
Old 15th October 2009, 01:51 PM   #102
ljfont is offline ljfont  Canada
diyAudio Member
 
ljfont's Avatar
 
Join Date: Feb 2008
Location: Vancouver, British Columbia
Quote:
Originally Posted by Geek View Post
So, what's the secret handshake to get at these worksheets. They aren't on his site

Cheers!
Get the license $25. Well worth the money. You can join his yahoo groups and he provides excellent support.
  Reply With Quote
Old 18th October 2009, 03:18 AM   #103
ljfont is offline ljfont  Canada
diyAudio Member
 
ljfont's Avatar
 
Join Date: Feb 2008
Location: Vancouver, British Columbia
Quote:
Originally Posted by planet10 View Post
For midrange use the stuffing gets denser as you approach the terminus, with almost none right behind the driver.

dave
How dense is dense? How dense is 1lb/ft^3 ? How do you estimate this when you're actually stuffing a box?

I've just been goin by ear to what I like then measuring afterwards.

Thanks,
Leo
  Reply With Quote
Old 18th October 2009, 03:40 AM   #104
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
I use experience and play until i'm happy. Quite dense as it gets to the terminus (likely > 1 lb/ft^3, i actually use a chunk of the dense open cel foam i commonly use for aperiodic ports)

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 21st October 2009, 11:16 PM   #105
ljfont is offline ljfont  Canada
diyAudio Member
 
ljfont's Avatar
 
Join Date: Feb 2008
Location: Vancouver, British Columbia
Default Another Variation

DIY never ends

I just came back from CSS and heard the EL70's and FR125SReN drivers and have been very impressed by them being so even and balanced.

Would an aperiodic midTL with dual EL70's or FR125SR work?

I just bought the SDX7's today. But after hearing these CSS drivers, I'm thinking of using either of those instead of the FE167E.

I should probably ask this question elsewhere but, would enabling the FE167E drivers and adding a phase plug make it more even and balanced.

Thank you.
  Reply With Quote
Old 22nd October 2009, 01:34 AM   #106
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 ljfont View Post

Would an aperiodic midTL with dual EL70's or FR125SR work?

I just bought the SDX7's today.
Sure... any FR will do, althou you like to squew them towards the ones that do top and mid best (usually smaller). RAW acoustics did an HT2 that was FR125 + Extremis 6.8 (then SDX7)

Make sure you do at least the minimal mods to the SDX7.

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 22nd October 2009, 06:29 AM   #107
chrisb is offline chrisb  Canada
diyAudio Member
 
Join Date: Aug 2002
Location: victoria BC
Quote:
Originally Posted by ljfont View Post
DIY never ends

I just came back from CSS and heard the EL70's and FR125SReN drivers and have been very impressed by them being so even and balanced.

Would an aperiodic midTL with dual EL70's or FR125SR work?

I just bought the SDX7's today. But after hearing these CSS drivers, I'm thinking of using either of those instead of the FE167E.

I should probably ask this question elsewhere but, would enabling the FE167E drivers and adding a phase plug make it more even and balanced.

Thank you.

In response to this and post in another thread, I think it's fair to say that at any "matching" level of stock or modified configuration, any Fostex and similar dimensioned Mark Audio / CSS driver will not exhibit the same degree of "balance" of tonality, dynamics or presentation (i.e. forward or relaxed). It's not necessary to choose exclusively between them - I have examples of each in my own systems, (FE127 / FE167 & EL70 - all with polka dots) and listen to both almost daily. And never underestimate the power of synergy ( i.e. to take something beyond the simple sum of the individual values).
__________________
you don't really believe everything you think, do you?
community sites t-linespeakers.org, frugal-horn.com commercial site planet10-HiFi

Last edited by chrisb; 22nd October 2009 at 06:32 AM. Reason: punctuation
  Reply With Quote
Old 22nd October 2009, 07:59 PM   #108
rx7mark is offline rx7mark  United States
diyAudio Member
 
Join Date: Jun 2009
Dave,
What line length would you recomend for the EL70 in a FAST design?

Also, have you had a chance to listen to the TRIO8 yet? Any thoughts or comparisons with the SDX7?

Mark
  Reply With Quote
Old 22nd October 2009, 08:24 PM   #109
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
With the EL70 a lower XO would be advisable, and the lower Fs also means a longer line. I'd fold it up like the FE167 sketch above and make the box at least 10" deep (deeper (up to ~14" wouldn't hurt). Keep in mind that as we are damping things aperiodically, actual design dimensions can vary quite a bit without a whole lot of impact on performance.

Alas Trio 8 is still sitting on my bench. 10 days down with the flue has me even further behind.

We do have a full-size FonkenPrime size box prtotype for the EL70 closing in on completion (probably ahead of me finishing EL70eN (intro special still stands therefore)).

dave

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 22nd October 2009, 11:01 PM   #110
rx7mark is offline rx7mark  United States
diyAudio Member
 
Join Date: Jun 2009
Hey Dave,
Thanks for the quick reply. I hope you feel better now, the flu can be tough at anytime.

I was hoping for some guidelines exactly like you mentioned. 10-14 inch depth, 10/1 area taper, folded, and aperiodically stuffed. Thanks for the guidlines. The design not being too critical is a bonus for my first effort.

I am trying to decide between the Tyson variant we are discussing with the EL70, or Alpair 7, on top and 1-2 SDX7's or Trio8's on the bottom sealed, and a Fonken type floorstander similar to your Bi-polar MiniOnken, but with 2 EL70's on top and one SDX7 or Trio8 on bottom.

Post you impressions of the big EL70 Fonken once they are done, I'de be very interested in your results.

Mark
  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
300B Set amp some variations MartinV56 Tubes / Valves 0 12th February 2008 09:22 PM
How fast are 'Fast Fuse' and how to identify? bigpanda Solid State 7 22nd March 2005 09:00 PM
Zen Variations 5 Nelson Pass Pass Labs 66 5th August 2003 04:57 PM
Zen & Zen Variations-Part.2 billy Pass Labs 1 7th August 2002 06:24 PM
Zen Variations 3 - Questions vpharris Pass Labs 0 22nd May 2002 07:08 PM


New To Site? Need Help?

All times are GMT. The time now is 11:31 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