Hornresp - Page 138 - 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 17th August 2010, 09:10 AM   #1371
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
post1367.
The divide by 10 in the plot.
Does that mean that @ 100Hz the graph is showing displacement ~14mm one way and = 28mm peak to peak?
__________________
regards Andrew T.
  Reply With Quote
Old 17th August 2010, 08:09 PM   #1372
mige0 is offline mige0  Austria
diyAudio Member
 
mige0's Avatar
 
Join Date: Jan 2005
Location: Austria, at a beautiful place right in the heart of the Alps.
Quote:
Originally Posted by David McBean View Post

I suspect that the problem may be with your system :-). No-one else has reported similar issues and as you can see from my earlier attachment, the capture feature normally also works with the Diaphragm Displacement chart.
No wonder - I have to apologize - its all been me, myself and I


Thanks for the answers to all other questions.

Michael

Last edited by mige0; 17th August 2010 at 08:13 PM.
  Reply With Quote
Old 17th August 2010, 08:20 PM   #1373
diyAudio Member
 
Join Date: Sep 2008
It would be 0.14mm one way
1.4 / 10
  Reply With Quote
Old 17th August 2010, 10:24 PM   #1374
diyAudio Member
 
Join Date: May 2009
Location: Wellington
David,

Hornresp appears to vertically scale the calculation result graphs automatically. While this is very convenient, it can lead to problems. For example, if the speaker has a high inductance, the electrical impedance can rise to a very high value at 20 KHz. This means the LF resonance impedance peaks are tiny bumps at the bottom of the graph. To see what I mean, pick any speaker and add 10 mH to its Le value. Then Calculate and display the electrical impedance graph. It's particularly bad on Volvotreter's Tang Band 38 Hz Tapped horn.

In my opinion, a solution that should suit novice and power users alike would be a slider beside the graph, allowing adjustment of the vertical scale. Just a suggestion...

... or maybe an option to limit the frequency range. I notice that the Loudspeaker Wizard graphs only go to 2 kHz or so, reducing the effects of the aforementioned impedance rise.

Last edited by Don Hills; 17th August 2010 at 10:27 PM.
  Reply With Quote
Old 18th August 2010, 07:58 AM   #1375
Kolbrek is offline Kolbrek  Norway
diyAudio Member
 
Kolbrek's Avatar
 
Join Date: Aug 2007
Don,

In the Electrical Impedance window, select Tools -> Range to select a different graph range. The 'Zoom' option fits the scale to the resonance peak(s). It's explained in the help file.

Bjørn
  Reply With Quote
Old 18th August 2010, 09:55 AM   #1376
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Quote:
Originally Posted by AndrewT View Post
post1367.
The divide by 10 in the plot.
Does that mean that @ 100Hz the graph is showing displacement ~14mm one way and = 28mm peak to peak?
Quote:
Originally Posted by David_Web View Post
It would be 0.14mm one way
1.4 / 10
which is it?
Have the results been plotted after the software has divide by 10 or as David suggests, the user divides what is shown by 10?
__________________
regards Andrew T.
  Reply With Quote
Old 18th August 2010, 11:03 PM   #1377
diyAudio Member
 
Join Date: May 2009
Location: Wellington
Quote:
Originally Posted by Kolbrek View Post
Don,

In the Electrical Impedance window, select Tools -> Range to select a different graph range. The 'Zoom' option fits the scale to the resonance peak(s). It's explained in the help file.

Bjørn
Thanks, Bjørn.
Everything I asked for, already there. And I pride myself on "Reading The Manual"... How embarrassing.
  Reply With Quote
Old 19th August 2010, 03:59 AM   #1378
diyAudio Member
 
Join Date: Jun 2007
Quote:
Originally Posted by AndrewT View Post
Have the results been plotted after the software has divide by 10 or as David suggests, the user divides what is shown by 10?
Hi Andrew,

For the example you quoted, the user should divide Y-axis displacement values by 10.

When in doubt the Sample tool can always be used to check actual values. See the screenprint below and the Diaphragm Displacement description on page 6 of the Help file.

Kind regards,

David
Attached Images
File Type: png Displacement.png (26.9 KB, 157 views)
__________________
www.hornresp.net
  Reply With Quote
Old 19th August 2010, 04:07 AM   #1379
diyAudio Member
 
Join Date: Jun 2007
Hi Don,

Just to complete the picture - the Range tool can also be used with the Group Delay chart.

Kind regards,

David
__________________
www.hornresp.net
  Reply With Quote
Old 19th August 2010, 04:17 AM   #1380
diyAudio Member
 
Join Date: Jun 2007
Quote:
Originally Posted by mige0 View Post
Thanks for the answers to all other questions.
Hi Michael,

You're welcome :-).

One thing I should have perhaps clarified in my earlier message - the loudspeaker will only see a constant frequency-independent input voltage of Eg if the amplifier output resistance Rg is set to the default value of zero ohms.

Kind regards,

David
__________________
www.hornresp.net
  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
Hornresp Class FlipC Subwoofers 8 3rd November 2008 06:23 PM
Some questions about hornresp brsanko Full Range 4 18th October 2008 09:36 PM
Hornresp help / JX150 316a Multi-Way 0 11th February 2004 03:56 PM


New To Site? Need Help?

All times are GMT. The time now is 01:12 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