Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Multi-Way Conventional loudspeakers with crossovers

Testing TS with driver vertical
Testing TS with driver vertical
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 6th September 2008, 12:47 AM   #11
claudio is offline claudio  Italy
diyAudio Member
 
claudio's Avatar
 
Join Date: Feb 2002
Location: Italy
When using the added mass method to measure the VAS, I prefer to place the driver horizontal.

About the voltage to feed the DUT, assuming you are using a sinewave signal,
0.5 Vrms are considered small signal.
__________________
______________________________
My Home Page: www.claudionegro.com
  Reply With Quote
Old 6th September 2008, 01:15 PM   #12
LineArray is offline LineArray  Germany
diyAudio Member
 
Join Date: Mar 2008
Quote:
Originally posted by mashaffer
Should I be using more signal?

Hi,

i would say it depends on how we want to use the
specific driver.

If it is used as a horn driver in a home installation driven
at moderate levels, the small signal parameters are
more important.

For low efficiency application in normal boxes or open
baffles the large signal parameters are important IMO.

Kind regards
__________________
Oliver, RFZ believer (?)
www.dipol-audio.de
  Reply With Quote
Old 6th September 2008, 02:58 PM   #13
Dr. Ram is offline Dr. Ram
diyAudio Member
 
Dr. Ram's Avatar
 
Join Date: Jan 2006
Location: Polynomialand
If you want to measure small signal parameters (e.g. T/S parameters) then the smallest signal that gives you consistent and repeatable measurements is the signal to use. That usually means less than - typically much less than - 0.5W. That the parameters may have been measured at 50mW does not affect that fact that they will give you good modeling results even at 1W, but perhaps not at 10W. That specific upper limit depends on the driver.

-Ram.
  Reply With Quote
Old 6th September 2008, 08:17 PM   #14
John_E_Janowitz is offline John_E_Janowitz  United States
diyAudio Member
 
Join Date: Jun 2004
Location: Green Bay, WI
Send a message via MSN to John_E_Janowitz
Here's a post I put up on our forum some time ago on properly measuring T/S parameters and all the efforts we went through to do it.

https://www.aespeakers.com/phpbb2/vi....php?f=4&t=927

John
  Reply With Quote
Old 6th September 2008, 08:30 PM   #15
richie00boy is offline richie00boy  United Kingdom
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
Testing TS with driver vertical
Lots of good info in that post. I do have one question though. If the driver is facing upwards, yes on the updard stroke it will be working against the weight of the cone and gravity, but this will be cancelled out exactly by it being assisted by gravity and the weight of the cone on the downward stroke, will it not?
__________________
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, modules and more.
  Reply With Quote

Reply


Testing TS with driver verticalHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Driver testing results augerpro Multi-Way 77 23rd July 2009 11:50 PM
Vertical WTMW driver alignment - pros and cons jb0194 Multi-Way 1 16th November 2008 10:20 PM
Forward & Vertical Driver Placement Mutley666 Multi-Way 2 27th February 2006 06:56 PM
Suspended driver ok for testing? Mos Fetish Multi-Way 1 13th January 2004 12:50 AM


New To Site? Need Help?

All times are GMT. The time now is 07:52 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki