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

Hornresp
Hornresp
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 11th February 2019, 06:12 AM   #9171
David McBean is offline David McBean  Australia
diyAudio Member
 
Join Date: Jun 2007
Quote:
Originally Posted by the lorn teat flag View Post
but when having a front loaded horn with a rear vented chamber it's not possible to put filling.
Hi Florent,

Model the front loaded horn with rear vented chamber as a compound horn. Filling material can then be added to the chamber (segment 1) and/or port tube (segment 3) as shown in the attachment. The horn itself will be limited to a single Con, Exp or Par flare.

Kind regards,

David
Attached Images
File Type: png Attach_1.png (47.2 KB, 95 views)
__________________
www.hornresp.net
  Reply With Quote
Old 11th February 2019, 06:20 AM   #9172
David McBean is offline David McBean  Australia
diyAudio Member
 
Join Date: Jun 2007
Quote:
Originally Posted by GM View Post
If it's in the HELP files I missed it.
Attached Images
File Type: png Attach_1.png (74.8 KB, 102 views)
__________________
www.hornresp.net
  Reply With Quote
Old 11th February 2019, 07:50 AM   #9173
David McBean is offline David McBean  Australia
diyAudio Member
 
Join Date: Jun 2007
Quote:
Originally Posted by NEO Dan View Post
It might be the Lossy LE in the wizard, it appears the default on state of Lossy Le is retained by the Baseline no matter what, it also takes some flipping of "switches" to turn off Lossy LE but ultimately the radio button is checked when the Lossy LE is off.

It's 180 degrees out of phase
Hi Dan,

If the lossy inductance option has been specified on the input parameters window (ie. Le label is red), then when the Loudspeaker Wizard is opened the 'Lossy Le' checkbox is shown ticked and the results take lossy inductance into account.

The Loudspeaker Wizard initial baseline does not take lossy inductance into account even if the option has been selected on the input parameters window. This may be changed in the next update.

Removing the Loudspeaker Wizard 'Lossy Le' checkbox tick calculates results without taking lossy inductance into account. The initial baseline is not affected either way by the 'Lossy Le' checkbox status.

I don't follow what you mean by "It's 180 degrees out of phase". More information would be appreciated.

Kind regards,

David
__________________
www.hornresp.net
  Reply With Quote
Old 11th February 2019, 08:56 AM   #9174
GM is offline GM  United States
diyAudio Member
 
GM's Avatar
 
Join Date: Jun 2003
Location: Chamblee, Ga.
Thanks! I only searched 'S1'.

GM
__________________
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote
Old 11th February 2019, 09:58 AM   #9175
freddi is offline freddi  United States
diyAudio Member
 
freddi's Avatar
 
Join Date: Aug 2005
Hornresp
BIG thanks GM - saw the glaring change to red - but didn't think to click on it - what wonders might option allow ? ?
  Reply With Quote
Old 11th February 2019, 10:26 AM   #9176
USRFobiwan is offline USRFobiwan
Horn Addict
diyAudio Member
 
USRFobiwan's Avatar
 
Join Date: Oct 2014
Location: Haarlem
Hornresp
I know enabling Le is for better measure high BL drivers but i did not expect Le would have such high impact on the xmax. I also wonder what frequencies the Le is applied too is this full scale or just one or two ranges.

Here is an example of high xmax Le off/on on the POC4 2.83v 8 Ohm:
lossy-inductance-on-off.png
__________________
Destroyed some nostalgia
For the love of Horns and glory of pressure waves.
  Reply With Quote
Old 11th February 2019, 11:07 AM   #9177
freddi is offline freddi  United States
diyAudio Member
 
freddi's Avatar
 
Join Date: Aug 2005
Hornresp
Hi David - that stepped allowance is really cool !
Click the image to open in full size.
Click the image to open in full size.

Last edited by freddi; 11th February 2019 at 11:17 AM.
  Reply With Quote
Old 11th February 2019, 12:38 PM   #9178
papasteack is offline papasteack  France
diyAudio Member
 
Join Date: Jan 2012
Location: Limousin
Quote:
Originally Posted by freddi View Post
Hi David - that stepped allowance is really cool !
Click the image to open in full size.
+1.

Quote:
Originally Posted by David McBean View Post
[...]
Incidentally, once I clear all the bugs, I want to get back to further investigating the possibility of modifying the Loudspeaker Wizard to accept stepped cylindrical horn segments only. I think that this should be a lot easier to do than having to also allow for Con, Exp and Par flare stepped segments.
David, if you manage it, do you think stuffing feature should be working in this case ?

My BP8 simed as stepped segment TH bellow. Vent sizes were decided with BP8 wizard vent velocity screens. Active filtering is just a low pass at 5hz and a -7db eq @6hz, as over-excursion protection. It seems really doable. Filtering of the 53cm long vent spike @350hz seems optimistic beeing so near the mouth.
Attached Images
File Type: png captoche.PNG (13.2 KB, 19 views)
File Type: png captoche2.PNG (8.1 KB, 24 views)
File Type: png captoche3.PNG (20.3 KB, 29 views)
File Type: png captoche4.PNG (19.0 KB, 27 views)
File Type: png captoche5.PNG (19.1 KB, 26 views)

Last edited by papasteack; 11th February 2019 at 01:02 PM.
  Reply With Quote
Old 11th February 2019, 08:06 PM   #9179
Josh Ricci is offline Josh Ricci  United States
diyAudio Member
 
Join Date: Apr 2009
Quote:
Originally Posted by USRFobiwan View Post
I know enabling Le is for better measure high BL drivers but i did not expect Le would have such high impact on the xmax. I also wonder what frequencies the Le is applied too is this full scale or just one or two ranges.

Here is an example of high xmax Le off/on on the POC4 2.83v 8 Ohm:
Attachment 735602
It affects ALL drivers to some aspect or another. Some are much worse than others. It also has effects on ALL aspects of performance over the entire frequency range of operation. Driver excursion included.
  Reply With Quote
Old 12th February 2019, 06:55 AM   #9180
David McBean is offline David McBean  Australia
diyAudio Member
 
Join Date: Jun 2007
Quote:
Originally Posted by USRFobiwan View Post
I know enabling Le is for better measure high BL drivers but i did not expect Le would have such high impact on the xmax.
The lossy inductance empirical model was originally developed by 'just a guy' using driver performance data provided mainly by Josh. The model reduces the value of Bl used in the Hornresp calculations, based on the specified values of Le and Re. With the Lossy Le option selected, the adjusted Bl value used by the program can be seen in the status bar panel at the bottom of the input parameters window when the mouse pointer is moved over the Bl input box, as shown in the attachment.
Attached Images
File Type: png Attach_1.png (55.2 KB, 19 views)
__________________
www.hornresp.net
  Reply With Quote

Reply


HornrespHide 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
Some questions about hornresp brsanko Full Range 7 3rd December 2018 10:04 AM
Hornresp Class FlipC Subwoofers 11 4th June 2016 07:33 AM
Hornresp help / JX150 316a Multi-Way 0 11th February 2004 04:56 PM


New To Site? Need Help?

All times are GMT. The time now is 02:38 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki