calculating subwoofer volume when lining walls - 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 5th September 2005, 02:46 PM   #1
justinc is offline justinc  United States
diyAudio Member
 
Join Date: Jan 2005
Location: boston
Default calculating subwoofer volume when lining walls

Im trying to design a linkwitz transform subwoofer so I need my internal volumes to be as accurate as possible. Using bassbox software to simulate. Assuming using 1.25" mdf and am going to line all interior surfaces with whispermat2 which is 1.25" thick. should i plug in 2.5" for the wall dimensions, or do you not subtract out the whispermat foam from the interior volume. thanks
  Reply With Quote
Old 5th September 2005, 03:37 PM   #2
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
Is the stuff heavy, bituminous foam, or more lightweight like fibreglass/rockwool?

If it's more like fibreglass treat it like it uses up volume, i.e. like your walls are 2.5 inch thick. But if it was me (and it was like fibreglass) I wouldn't even use it as it will just waste valuable volume for very little - if any - gain.
__________________
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more.
  Reply With Quote
Old 5th September 2005, 04:03 PM   #3
justinc is offline justinc  United States
diyAudio Member
 
Join Date: Jan 2005
Location: boston
it is a sound deadening foam, basically really smilar to blackhole5 http://www.silentsource.com/barriers...rmat1and2.html
I have yet to even try it, but I have read others say it is very good for subwoofer enclosures and is much less expensive than blackhole 5.
  Reply With Quote
Old 5th September 2005, 11:40 PM   #4
Ron E is offline Ron E  United States
diyAudio Member
 
Ron E's Avatar
 
Join Date: Jun 2002
Location: USA, MN
A lot of people like to gild the lily. With 1.25" walls, assuming you have used good construction practices, there should be no resonances below 200Hz. Bracing is much more effective than damping at low frequencies. Once you hit the panel resonant frequency, then you need damping.
__________________
Our species needs, and deserves, a citizenry with minds wide awake and a basic understanding of how the world works. --Carl Sagan
Armaments, universal debt, and planned obsolescence--those are the three pillars of Western prosperity. Aldous Huxley
  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
Calculating box dimensions from cubic volume retroman Multi-Way 6 11th July 2009 04:06 AM
Calculating enclosure volume for TL Kensai Full Range 8 15th February 2008 04:49 PM
Calculating Cabinet Volume? kestrel200 Multi-Way 10 16th January 2005 12:23 PM
Calculating volume - bandpass enclosure avatar307 Subwoofers 6 14th December 2003 01:59 AM
Lining inside active subwoofer JDeV Subwoofers 4 17th January 2003 12:07 PM


New To Site? Need Help?

All times are GMT. The time now is 04:52 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