too large box - 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 15th May 2009, 06:30 PM   #1
ryan750 is offline ryan750  Philippines
diyAudio Member
 
Join Date: Oct 2007
Default too large box

hi, is it possible to decrease the volume of a box??? hmm. dumping some stuff inside?? or something like that. tnx,
  Reply With Quote
Old 15th May 2009, 06:55 PM   #2
Thawach is offline Thawach  Thailand
diyAudio Member
 
Thawach's Avatar
 
Join Date: Dec 2007
yes u can decrease the volume of a box and put some stuff inside.
  Reply With Quote
Old 15th May 2009, 07:34 PM   #3
diyAudio Member
 
Richard Ellis's Avatar
 
Join Date: Sep 2006
Location: Mar del Plata, a BIG seasonal getaway city, can see the Ocean from our residence.
You have got it backwards...stufing a sealed enclosure with dacron or fibreglass will INCREASE the apperant size of the box.
The system will be increased 15% for Dacron, 18% for fibreglass.
Remember what happens when you compress air??It increases in temperature..adding stuffing adds a thermal mass that the air is trying to heat up...sinking the heat...making for an Isothermal process, rather than an Adiabatic process.
Myself I use Cotton batting..which I believe is superior, but can easily mold if moisture is present.
_________________________________________Rick.....
  Reply With Quote
Old 15th May 2009, 08:06 PM   #4
Speakerholic
diyAudio Moderator
 
Cal Weldon's Avatar
 
Join Date: Jan 2004
Location: Near Vancouver
I think he meant to put some stuff inside, not stuffing as you rightly pointed out.

Yes, put something like pieces of wood or bricks to decrease the volume.
__________________
Next stop: Margaritaville
Some of Cal's stuff | Cal Weldon Consulting
  Reply With Quote
Old 15th May 2009, 08:14 PM   #5
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
 
Join Date: Nov 2005
Or line the inside with foam with closed cells, thats not acoustic transparent

Or like Cal says, use wood
Maybe a good idea to mount pieces of wooden sticks in all inside joints, with some kind of flexible glue

Bags with dry sand has also been used
__________________
sometimes we know very little, and sometimes we know too much
  Reply With Quote
Old 15th May 2009, 08:38 PM   #6
Thawach is offline Thawach  Thailand
diyAudio Member
 
Thawach's Avatar
 
Join Date: Dec 2007
i ever did by bracing the box a lot.
  Reply With Quote
Old 15th May 2009, 09:45 PM   #7
diyAudio Member
 
Richard Ellis's Avatar
 
Join Date: Sep 2006
Location: Mar del Plata, a BIG seasonal getaway city, can see the Ocean from our residence.
My bad...I see now. Bag-O-sand..seems most simple, can take up a lot of volume. The added weight shouldn't be too bad, might reinforce the structure somewhat.
_______________________________________________Ric k...
  Reply With Quote
Old 15th May 2009, 10:07 PM   #8
Speakerholic
diyAudio Moderator
 
Cal Weldon's Avatar
 
Join Date: Jan 2004
Location: Near Vancouver
I wonder if a bag of sand is dense enough or if it might act a bit like the fiber type stuffing?

I have always used old pieces of lumber when starting with oversized test boxes.
__________________
Next stop: Margaritaville
Some of Cal's stuff | Cal Weldon Consulting
  Reply With Quote
Old 16th May 2009, 01:19 PM   #9
diyAudio Member
 
chris661's Avatar
 
Join Date: Feb 2008
Location: Sheffield
Blog Entries: 8
The best I found was empty bottles, filled with water. This was you can choose the amount you reduce it by, to the nearest 1/2 litre.

Better start drinking that Coke....
__________________
"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 16th May 2009, 05:28 PM   #10
gni is offline gni  United States
diyAudio Member
 
gni's Avatar
 
Join Date: Sep 2006
Why not sand in the liter bottles? The bottles is quite creative.

I glue blocks of wood. . . precise also. . . particle board is cheap and glues well.
  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
FS: Large inductors, Large Ports, and Leaky Holes luvdunhill Swap Meet 10 6th March 2009 03:01 PM
Large Cone/large VC or several medium sized cones / medium VCs vajolet Multi-Way 14 3rd December 2007 06:10 PM
WTB: Large Cap's Transmitter Man Swap Meet 0 7th August 2004 08:23 PM
Large Cap! What to do? Christian Solid State 8 23rd September 2002 04:40 AM


New To Site? Need Help?

All times are GMT. The time now is 02:46 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