Go Back   Home > Forums > Loudspeakers > Multi-Way

Multi-Way Conventional loudspeakers with crossovers

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 December 2002, 01:41 AM   #1
diyAudio Member
 
Circlotron's Avatar
 
Join Date: Jun 2002
Location: Melbourne, Australia
Default How do you measure Vas by added mass method?

I have searched everywhere for this info. Plenty of people mention it but I can't find the actual step by step procedure. Any help or links would be appreciate.
__________________
Best-ever T/S parameter spreadsheet.
http://www.diyaudio.com/forums/multi...tml#post353269
  Reply With Quote
Old 28th December 2002, 08:11 PM   #2
diyAudio Member
 
jackinnj's Avatar
 
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
Default you use the added mass to calculate compliance

1) find f(s)
2) apply a blob of modeling clay, with mass M' ( 5g for an 8" woofer) , and find the new f(s), or fs'
3) M (grams) = M' / (((fs/fs')^2)-1)
4) Cms =1/(((2 pi fs)^2)*( M))
5) Vas = Cms* d * (c^2) *A^2

where Cms is expressed in cm/dyne
d = density of air in gm/cm^3
c = speed of sound cm/sec
A = area of cone in cm^2
  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
Vas measurements by added-mass method in Speaker Workshop tcpip Multi-Way 26 1st June 2009 09:07 PM
Measuring subwoofer TSP: Added mass method best practise Groundloops Subwoofers 1 16th February 2009 11:09 PM
2 x XLS10 / vented box + added mass? quickshift Subwoofers 1 9th July 2008 01:36 PM
Formulas to calculate new TS values when mass added macky888 Multi-Way 8 14th February 2004 06:36 PM
"mass added to cone" I'm confused about it's meaning Jimmy154 Multi-Way 12 8th July 2002 02:53 AM


New To Site? Need Help?

All times are GMT. The time now is 06:03 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