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 28th February 2011, 11:29 AM   #1
onform is offline onform  England
diyAudio Member
 
onform's Avatar
 
Join Date: Apr 2008
Talking Cardboard for open baffle

This is not your average cardboard mind! It is very strong and rigid but still very light. I'm going to give it a go anyway just wondered what you guy's thought?
  Reply With Quote
Old 28th February 2011, 12:00 PM   #2
diyAudio Member
 
picowallspeaker's Avatar
 
Join Date: Apr 2007
You can give it a try as long as you already have it. I have a cardboard mind !
But it's a well constrained layer damping...
  Reply With Quote
Old 28th February 2011, 12:23 PM   #3
onform is offline onform  England
diyAudio Member
 
onform's Avatar
 
Join Date: Apr 2008
You have a cardboard
Mind

What have you used to damp yours and how large is it?
  Reply With Quote
Old 28th February 2011, 12:41 PM   #4
diyAudio Member
 
picowallspeaker's Avatar
 
Join Date: Apr 2007
Skull being very tough
And I am an 'heavy smoker' , so many bitumen foils in the inside ,bracing...OH it's an OB vibrational modes should be stopped at their raising ,but steel + cardboard is not very clever . Some wooden frame may be unnecessary... So you loose the benefits of having some light material such CB ,I might say it could be useful in 3D applications such as little boxes where speaker's motor is not very powerful ...in the 1-5 W range ...and cabinet construction and geometry allows not having large surfaces free to vibrate.
  Reply With Quote
Old 28th February 2011, 01:40 PM   #5
mor2bz is offline mor2bz  United States
diyAudio Member
 
Join Date: May 2005
Location: colorado
the reason OB sound better is not because the baffle doesn't vibrate
as much as a box. It does, and that is the source of some of the bass.

the best speaker i ever made was from a bicycle box with one side cut out
so it was a panel with 6" wings on all sides, hung from a ceiling. the driver
was fitted in a wood baffle that was screwed and glued to the box.
driver was a Moth Cicada. sounded unreal, just wouldn't get very loud.
  Reply With Quote
Old 28th February 2011, 02:31 PM   #6
diyAudio Member
 
picowallspeaker's Avatar
 
Join Date: Apr 2007
As I said ,I'm a cardboard guy too . If you want to control the inertial mass
of the 'speaker holder (box or OB) ' and don't want to obtain random results ,it
is better to do a constrained layer damping ,even with a steel foil . I use PVC for external finish ,although it is pretty sound transparent , and bitumen foils on the inside . As in architecture ,structure of a building must have solid bases.
Otherwise ,you'll end with a colorado sound Hey ! I know someone in Boulder and Hygiene BTW
  Reply With Quote
Old 28th February 2011, 02:44 PM   #7
diyAudio Member
 
Join Date: Feb 2011
Location: Cardiff
I've found that cardboard is a perfect material for prototype building before cutting away at my MDF. My last design (camping/festival hifi based on ls3/5a's) left the side/top/bottom more resonant than the drivers themselves!
  Reply With Quote
Old 28th February 2011, 04:48 PM   #8
onform is offline onform  England
diyAudio Member
 
onform's Avatar
 
Join Date: Apr 2008
The pieces I'm going to use are pre folded so I will have wings. The wings are of equal dimensions to the front baffle. I know that it is double ply and it's 15mm thick and very rigid! If I get the exact dimensions tomorrow would someone be able to run them through a program to find the optimum placement? Also any advice on OB design would be great! Oh btw I'm going to use the alpair7's.

Also I have another piece roughly 150cm sq and 35mm thick!! Do you think and OB sub is a good idea? I don't have a huge living room!
  Reply With Quote
Old 2nd March 2011, 12:58 AM   #9
PKNJ is offline PKNJ  United States
diyAudio Member
 
Join Date: Oct 2008
Default Go Right Ahead!

I used cardboard to extend the size of an OB speaker. The cheap, normal corrugated cardboard they make boxes from. Worked quite well to demonstrate the principle. At the low levels I was generating, resonance wasn't the problem.

Try it out. No big loss if it doesn't work!
  Reply With Quote
Old 2nd March 2011, 04:56 AM   #10
onform is offline onform  England
diyAudio Member
 
onform's Avatar
 
Join Date: Apr 2008
I brought the pieces home and placed them in my living room. I don't think an OB set up is quite suited to my room size!! Lol
  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
Murphy baffle radios [ open baffle ] keithpeter Full Range 10 11th September 2007 07:59 PM
what effect does baffle have on open-baffle system? kappa546 Multi-Way 6 24th January 2006 10:21 PM
Cardboard Open Baffle Bargain Bin Ropie Multi-Way 0 27th February 2005 06:19 PM
Australians- what solid timbers for baffle? (open baffle loudspeaker) tktran Multi-Way 13 29th November 2004 11:09 PM
Open baffle - from cardboard to... miguel2 Multi-Way 1 27th July 2004 04:55 PM


New To Site? Need Help?

All times are GMT. The time now is 08:39 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