T/S parameters. Help!!! - diyAudio
Go Back   Home > Forums > Loudspeakers > Multi-Way
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 21st February 2002, 01:44 PM   #1
Higo is offline Higo  Argentina
diyAudio Member
Join Date: Feb 2002
Location: Argentina
Question T/S parameters. Help!!!

Im a newbie in the Speakers world and I want to ask you a few questions.
The most important, Im sorry for my written english. I know that I need to improve it.
Well, I live in Argentina and due to our economical situation, is imposible to import speakers from others countries (Vifa, Audax, etc)
Even a book like "The Loudspeaker Design Cookbook" its imposible to find it.
Anyway I bought a couple of speakers (8" woofer, 8 ohms, polypropylene cones,bell melting, Re=6.9) made it here.
Yesterday I was measuring the impedance. Afortunatly I didnt have problems. But Im a litle confused. I found fs at 48 Hz (Zmax=23.51 ohms). And I started to search f1 and f2.
According to www.speakermania.com/transd/find.html, f1 and f2 are the frecuencies where Z=R1 where R1=(Sqrt(Zmax/Re))*Re. With this I found R1=12.734 Ohms and f1=38 Hz and f2=59 Hz. Then fs=Sqrt(f1*f2)=47.32. Everything ok!!!
If I follow the ecuations that appears in the mentionated page I have:


Due to this values I decided to use other method that apears in www.sound.au.com/tsp.htm and:

The question: Whichs right??? What Im doing wrong???
Any help will be appreciated.
Marcelo (Higo)
from Buenos Aires
  Reply With Quote
Old 21st February 2002, 04:33 PM   #2
diyAudio Member
Join Date: Aug 2001
Location: Bath, UK
If building speakers is something you intend to do some more of, I'd suggest that you download a copy of Speaker Workshop from...


(it's free). It does automatic impedance measurements, TS pararameter estimation, acoustic measurements and much, much more. The software only really comes into it's own if you build a jig; see


... for more details about the jig.

Hope this helps,
  Reply With Quote
Old 21st February 2002, 04:54 PM   #3
Higo is offline Higo  Argentina
diyAudio Member
Join Date: Feb 2002
Location: Argentina
Thank you for your help.
  Reply With Quote


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
Hi-fi Sub parameters aleexman Subwoofers 1 11th January 2008 11:47 AM
Parameters Dr_EM Full Range 3 15th March 2007 02:44 PM
T/S parameters masterp2 Subwoofers 1 23rd November 2006 02:18 AM
E-V T/S Parameters ingvar ahlberg Multi-Way 2 23rd April 2004 05:58 PM
T/S parameters Doug Multi-Way 2 29th March 2003 10:25 AM

New To Site? Need Help?

All times are GMT. The time now is 04:27 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2