S-Frame subwoofer? - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers

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 9th January 2010, 10:01 AM   #1
diyAudio Member
 
chris661's Avatar
 
Join Date: Feb 2008
Location: Sheffield
Blog Entries: 8
Default S-Frame subwoofer?

I've had this idea (might even try it), where you (effectively) fold a baffle around a speaker, in the shape of an S

You'd put the woofer in the middle horizontal, and get a dipole output, but the baffle width would seem a lot higher (to the driver) which would result in increased bass output (there would be a lid on this design). I figure that, using an 8" woofer I have knocking around, I could make one that's 6" tall, and 9" square. These could be stackable, for increased bass output.

Someone may have already done this, but I thought it may be worth sharing as the search returned nothing.

Thanks for reading
Chris
__________________
"Throwing parts at a failure is like throwing sponges at a rainstorm." - Enzo
My setup: http://www.diyaudio.com/forums/multi...tang-band.html
  Reply With Quote
Old 11th January 2010, 03:24 AM   #2
diyAudio Member
 
Join Date: Jan 2009
Hi There: An enclosure of this type is patetened by Axel Ridthahler and information can be found by Googling: RIPOLE R30. I have constructed a DIY 12-inch single enclosure (operating) and a verticle stacked dual 12-inch DIY version is nearing completion. The single driver version needs a driver with considerable Xmax, so I will be connecting the 2 drivers in the dual version in series. Also you can read-up on ripole, in open back threads and OB theory on Siegfried Linkwitz's site.
... Michael Droke
  Reply With Quote
Old 11th January 2010, 07:21 AM   #3
diyAudio Member
 
chris661's Avatar
 
Join Date: Feb 2008
Location: Sheffield
Blog Entries: 8
Ok, thanks for that. Time to do some more reading.
__________________
"Throwing parts at a failure is like throwing sponges at a rainstorm." - Enzo
My setup: http://www.diyaudio.com/forums/multi...tang-band.html
  Reply With Quote
Old 12th January 2010, 12:20 PM   #4
Dr_EM is offline Dr_EM  United Kingdom
diyAudio Member
 
Dr_EM's Avatar
 
Join Date: Oct 2006
Location: Swindon
Quote:
Originally Posted by j.michael droke View Post
...The single driver version needs a driver with considerable Xmax...
Yes, when I was experimenting with OB, I found the dual driver W-baffle/Ripole to have far more output. Worth persuing imo
  Reply With Quote
Old 12th January 2010, 03:32 PM   #5
diyAudio Member
 
chris661's Avatar
 
Join Date: Feb 2008
Location: Sheffield
Blog Entries: 8
Thanks for the encouragement. I thought they'd be a good way of getting reasonable bass from a small package - for an 8" woofer, you'd need maybe a 10" square, and 5" deep?

Seems like a good way to reduce size to me...
__________________
"Throwing parts at a failure is like throwing sponges at a rainstorm." - Enzo
My setup: http://www.diyaudio.com/forums/multi...tang-band.html
  Reply With Quote
Old 12th January 2010, 04:12 PM   #6
diyAudio Member
 
Join Date: Jan 2009
Quote:
Originally Posted by chris661 View Post
Thanks for the encouragement. I thought they'd be a good way of getting reasonable bass from a small package - for an 8" woofer, you'd need maybe a 10" square, and 5" deep?

Seems like a good way to reduce size to me...
Hi there: My Ripoles use 12-inch driver(s) in 14x14-inch (14x28 for the dual) x 5.375-inch deep enclosures. ...regards, Michael
  Reply With Quote
Old 15th February 2010, 05:11 PM   #7
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
Anyone tried a ripole this way ?
Attached Images
File Type: jpg ripole sub.JPG (16.5 KB, 313 views)
  Reply With Quote
Old 15th February 2010, 06:10 PM   #8
diyAudio Member
 
chris661's Avatar
 
Join Date: Feb 2008
Location: Sheffield
Blog Entries: 8
Looks similar to a W-frame system, but with a lid, and more edges. If you put the drivers at an angle to each other, you'll see what I mean.

Here's an idea. Make a ripole sub, but then stuff (heavily) one side. Maybe the attenuation would be enough to have significant output at lower frequencies.
__________________
"Throwing parts at a failure is like throwing sponges at a rainstorm." - Enzo
My setup: http://www.diyaudio.com/forums/multi...tang-band.html
  Reply With Quote
Old 15th February 2010, 06:19 PM   #9
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
Quote:
Originally Posted by chris661 View Post
Looks similar to a W-frame system
It is
Someone created the "ripole" name fore commercial reasons

I think the original general describtion is "folded dipole"

I presented this, because I havent seen it this way before, with openings facing down and up
Drawing also shows kind of a marriage with H-frame, making the baffle effect more effective
Well, maybe kind of a dipole-omni hybrid
Attached Images
File Type: jpg ripole sub.JPG (16.5 KB, 289 views)
  Reply With Quote
Old 15th February 2010, 07:27 PM   #10
diyAudio Member
 
chris661's Avatar
 
Join Date: Feb 2008
Location: Sheffield
Blog Entries: 8
Here's a thought...

Instead of just folding the baffle once (ripole, S-frame, whatever you want to call it), why not fold it lots of times around the driver? You'd get some kind of spiral, not sure what that would do...
I don't know how you'd do it with 2 drivers, but it would be easy enough with one...
Chris
__________________
"Throwing parts at a failure is like throwing sponges at a rainstorm." - Enzo
My setup: http://www.diyaudio.com/forums/multi...tang-band.html
  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
H frame vs W frame dipole woofers rick57 Multi-Way 18 8th October 2011 05:58 PM
W-Frame or H-Frame dipoles? performace issues? JinMTVT Subwoofers 34 5th October 2006 05:44 PM
H frame/ Dipole/U frame ???????? j.burtt Multi-Way 24 1st May 2006 04:50 AM
H-Frame mcds Multi-Way 3 17th April 2004 04:50 PM


New To Site? Need Help?

All times are GMT. The time now is 12:00 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