Speaker enclosure for FF125WK - 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 6th September 2011, 08:49 AM   #1
diyAudio Member
 
Join Date: Feb 2006
Location: Barcelona
Default Speaker enclosure for FF125WK

Hi all,
I'm planning to build a BR enclosure for the fostex FF125WK. It will be used next to a TV (home cinema, music from media center...) I have a few questions...

- Fostex suggests a building plan (9 litres, fb=57 Hz...). After entering the drivers TS parameters into WinISD, the resulting ideal box is quite different (smaller, higher fb..) Should I better stick to Fostex's dimensions?

- My idea is to build something more unique than the standard rectangular box. (I'd like non-parallel walls, etc.) Is it OK to modify the shape as long as I respect the inner volume and duct tuning?

- The speakers will be standing right next to the TV, but not touching. Has anybody studied the effect of the screen as an extension of the baffle?

Thank you for your suggestions!
  Reply With Quote
Old 6th September 2011, 05:10 PM   #2
chrisb is online now chrisb  Canada
diyAudio Member
 
Join Date: Aug 2002
Location: victoria BC
Quote:
Originally Posted by vintvolt View Post
Hi all,
I'm planning to build a BR enclosure for the fostex FF125WK. It will be used next to a TV (home cinema, music from media center...) I have a few questions...

- Fostex suggests a building plan (9 litres, fb=57 Hz...). After entering the drivers TS parameters into WinISD, the resulting ideal box is quite different (smaller, higher fb..) Should I better stick to Fostex's dimensions?

- My idea is to build something more unique than the standard rectangular box. (I'd like non-parallel walls, etc.) Is it OK to modify the shape as long as I respect the inner volume and duct tuning?

- The speakers will be standing right next to the TV, but not touching. Has anybody studied the effect of the screen as an extension of the baffle?

Thank you for your suggestions!
Having built several of the Fostex BR & BLH enclosures, I'd suggest you can do better - for the FF125WK, you might want to consider this one: ( approx 13 liters)

http://homepage.mac.com/tlinespeaker...-fonken-tn.gif


or for higher cutoff that's usually the case when using the bass management and separate powered woofer(s) in a HT/cinema set up, a smaller (4.5 liter) box that can easily be laid sideways for center;
http://homepage.mac.com/tlinespeaker...map-270509.pdf



While both of these were originally designed for the late FE127E, based on recently listening, I'd suggest the new WK would work just fine.
__________________
you don't really believe everything you think, do you?
community sites t-linespeakers.org, frugal-horn.com commercial site planet10-HiFi
  Reply With Quote
Old 6th September 2011, 06:45 PM   #3
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 chrisb View Post
While both of these were originally designed for the late FE127E, based on recently listening, I'd suggest the new WK would work just fine.
Fine tuned versions of the Fonkens for WK (FonkenWKs) are underway.

Just yesterday i sent Bernie away with plans for uFonkenSE-t. Regular uFonkenWK not far behind. FF125WK up next for FonkenWKprime, mFonkenWK and CGRs.

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 6th September 2011, 07:59 PM   #4
diyAudio Member
 
Godzilla's Avatar
 
Join Date: Nov 2005
Location: New York
Thanks, this may be timely for me. I was thinking about re working a smaller cab for my currently unused 127e... was thinking along the lines of a smallish cube for a bookshelf. That 4.5l looks interesting to me.

Zilla
  Reply With Quote
Old 6th September 2011, 08:58 PM   #5
chrisb is online now chrisb  Canada
diyAudio Member
 
Join Date: Aug 2002
Location: victoria BC
Quote:
Originally Posted by Godzilla View Post
Thanks, this may be timely for me. I was thinking about re working a smaller cab for my currently unused 127e... was thinking along the lines of a smallish cube for a bookshelf. That 4.5l looks interesting to me.

Zilla
I think you wouldn't be underwhelmed
__________________
you don't really believe everything you think, do you?
community sites t-linespeakers.org, frugal-horn.com commercial site planet10-HiFi
  Reply With Quote
Old 7th September 2011, 11:22 AM   #6
diyAudio Member
 
Join Date: Feb 2006
Location: Barcelona
Thanks all for your suggestions, especially to planet10 for the Fonken designs. The mFonkes seems particularly suited for my needs
When you say fine-tuned versions, do you mean you modify them empirically based on some theoretical calculations? I'm interested in the theory behind these. They are a type of bass-reflex boxes, but the slots/vents are filled with absorptive material, doesn't this eliminate the air-mass effect of the port?
Thanks
  Reply With Quote
Old 7th September 2011, 04:19 PM   #7
chrisb is online now chrisb  Canada
diyAudio Member
 
Join Date: Aug 2002
Location: victoria BC
Quote:
Originally Posted by vintvolt View Post
Thanks all for your suggestions, especially to planet10 for the Fonken designs. The mFonkes seems particularly suited for my needs
When you say fine-tuned versions, do you mean you modify them empirically based on some theoretical calculations? I'm interested in the theory behind these. They are a type of bass-reflex boxes, but the slots/vents are filled with absorptive material, doesn't this eliminate the air-mass effect of the port?
Thanks

"Fine-tuning" in the sense of (perhaps very minor) adjustments to net internal volume and slot port dimensions - we've found the basic architecture of this design to be compliant enough to suit a wide range (but certainly not all) small wide-band drivers that we've tried to date.

Not all vented enclosures are "simple bass-reflex". The slots in the P10 "mini-onken" family are not generally filled with absorptive material - their aspect ratio is intended to provide additional resistance to the panel lining. Ideally, the net effect would be controlled aperiodic / resistive loading.
__________________
you don't really believe everything you think, do you?
community sites t-linespeakers.org, frugal-horn.com commercial site planet10-HiFi
  Reply With Quote
Old 7th September 2011, 05:49 PM   #8
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
The design procesfor these is in my head. I take my modeler (MacSpeakerz) and generate a specific shape curve and then adjust that curve in my head to take into account the long, high-ratio vent slots.

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 25th October 2011, 03:51 PM   #9
diyAudio Member
 
Join Date: Nov 2006
Location: Milan
Quote:
Originally Posted by planet10 View Post
Fine tuned versions of the Fonkens for WK (FonkenWKs) are underway.

Just yesterday i sent Bernie away with plans for uFonkenSE-t. Regular uFonkenWK not far behind. FF125WK up next for FonkenWKprime, mFonkenWK and CGRs.

dave
Great news! are you planning to develop a fine tuned fonken box for FF105WK, as well?
I'm using these in a tqwt enclosure previously operated by a now defunct 103sigmas,..this new FF is a step forward in sound quality.. I just imagine what these can do with specific optimizations
Valeriano
  Reply With Quote
Old 25th October 2011, 04:16 PM   #10
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
Maybe... based only on the previous generation, i'm not overly stoked on them... very little money gets you the next size up. We'll see... we are slowly working thru the new drivers.

BTW, uFonkenSET is a big suxxess sonically.

miniOnken/Fonken Picture Gallery

Mar-Ken with Alpair 7.3


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
speaker enclosure asbn369 Multi-Way 10 18th February 2011 05:58 PM
Speaker Enclosure rudy129 Multi-Way 1 21st May 2009 03:52 PM
Most creative speaker enclosure? mashaffer Multi-Way 27 15th March 2006 02:07 AM
How do I know the best speaker for an enclosure? dohhhhh6 Subwoofers 2 3rd June 2005 05:19 PM
Right Sub for Speaker Enclosure Xyberz Multi-Way 3 9th September 2002 12:03 PM


New To Site? Need Help?

All times are GMT. The time now is 06:58 PM.


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