T/S parameters. Help!!!
 User Name Stay logged in? Password
 Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read Search

 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
 21st February 2002, 02:44 PM #1 Higo   diyAudio Member   Join Date: Feb 2002 Location: Argentina T/S parameters. Help!!! I´m a newbie in the Speakers world and I want to ask you a few questions. The most important, I´m 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" it´s 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 didn´t have problems. But I´m 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: Qms=4.218 Qes=1.753 Qts=1.238 ???? Due to this values I decided to use other method that apears in www.sound.au.com/tsp.htm and: Qms=3.51 Qes=1.02 Qts=0.79 The question: Which´s right??? What I´m doing wrong??? Any help will be appreciated. Marcelo (Higo) from Buenos Aires
 21st February 2002, 05:33 PM #2 daatkins   diyAudio Member   Join Date: Aug 2001 Location: Bath, UK Higo, If building speakers is something you intend to do some more of, I'd suggest that you download a copy of Speaker Workshop from... http://www.audua.com (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 http://www.gti.net/wallin ... for more details about the jig. Hope this helps, David
 21st February 2002, 05:54 PM #3 Higo   diyAudio Member   Join Date: Feb 2002 Location: Argentina Thank you for your help. Marcelo

 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 Forum Rules
 Forum Jump User Control Panel Private Messages Subscriptions Who's Online Search Forums Forums Home Site     Site Announcements     Forum Problems Amplifiers     Solid State     Pass Labs     Tubes / Valves     Chip Amps     Class D     Power Supplies     Headphone Systems Source & Line     Analogue Source     Analog Line Level     Digital Source     Digital Line Level     PC Based Loudspeakers     Multi-Way     Full Range     Subwoofers     Planars & Exotics Live Sound     PA Systems     Instruments and Amps Design & Build     Parts     Equipment & Tools     Construction Tips     Software Tools General Interest     Car Audio     diyAudio.com Articles     Music     Everything Else Member Areas     Introductions     The Lounge     Clubs & Events     In Memoriam The Moving Image Commercial Sector     Swap Meet     Group Buys     The diyAudio Store     Vendor Forums         Vendor's Bazaar         Sonic Craft         Apex Jr         Audio Sector         Acoustic Fun         Chipamp         DIY HiFi Supply         Elekit         Elektor         Mains Cables R Us         Parts Connexion         Planet 10 hifi         Quanghao Audio Design         Siliconray Online Electronics Store         Tubelab     Manufacturers         AKSA         Audio Poutine         Musicaltech         Aussie Amplifiers         CSS         exaDevices         Feastrex         GedLee         Head 'n' HiFi - Walter         Heatsink USA         miniDSP         SITO Audio         Twin Audio         Twisted Pear         Wild Burro Audio

 Similar Threads Thread Thread Starter Forum Replies Last Post aleexman Subwoofers 1 11th January 2008 12:47 PM Dr_EM Full Range 3 15th March 2007 03:44 PM masterp2 Subwoofers 1 23rd November 2006 03:18 AM ingvar ahlberg Multi-Way 2 23rd April 2004 06:58 PM Doug Multi-Way 2 29th March 2003 11:25 AM

 New To Site? Need Help?

All times are GMT. The time now is 11:00 PM.