Hornresp - Page 212 - 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 15th August 2011, 12:58 PM   #2111
Mark Kravchenko --- www.kravchenko-audio.com
diyAudio Member
 
mwmkravchenko's Avatar
 
Join Date: Jan 2002
Location: Perth Canada
I think your application of the spread sheet is in error.

Remember that a successful horn in a standard application is usually best created using a 1/4 space or 1 Pi size as a minimum. Your horn design using a 1/8th space loading and looking good...

Well that will only exist on your computer screen. That is what David is referring to as a severely truncated mouth. It should be at least twice the current size.
__________________
Mark
  Reply With Quote
Old 15th August 2011, 01:11 PM   #2112
diyAudio Member
 
dirkwright's Avatar
 
Join Date: May 2011
Location: Virginia
Quote:
Originally Posted by mwmkravchenko View Post
I think your application of the spread sheet is in error.

Remember that a successful horn in a standard application is usually best created using a 1/4 space or 1 Pi size as a minimum. Your horn design using a 1/8th space loading and looking good...

Well that will only exist on your computer screen. That is what David is referring to as a severely truncated mouth. It should be at least twice the current size.
In the spreadsheet, I designated 1/4 size for the horn. If it was twice the size, then it'd be a 1/2 size horn, wouldn't it? What exactly is wrong with the spreadsheet? I got it from here:
Download Section
  Reply With Quote
Old 15th August 2011, 01:18 PM   #2113
Mark Kravchenko --- www.kravchenko-audio.com
diyAudio Member
 
mwmkravchenko's Avatar
 
Join Date: Jan 2002
Location: Perth Canada
Ok I'm not going to get into vetting a spreadsheet. You have a very powerful program on your computer called Hornresp.

Punch in your numbers in the bottom section where you enter in the driver parameters.

Set your Ang to 1 Pi.

Go to the tools section and click on system design and use the section with driver. This will get you a near perfect horn for what you are looking for. That will get you a horn profile. Click on the Hyp section and press T on your keyboard this will change the horn profile to Tractrix. Now simulate and fool around.
__________________
Mark
  Reply With Quote
Old 15th August 2011, 01:30 PM   #2114
diyAudio Member
 
dirkwright's Avatar
 
Join Date: May 2011
Location: Virginia
Quote:
Originally Posted by mwmkravchenko View Post
Ok I'm not going to get into vetting a spreadsheet. You have a very powerful program on your computer called Hornresp.

Punch in your numbers in the bottom section where you enter in the driver parameters.

Set your Ang to 1 Pi.

Go to the tools section and click on system design and use the section with driver. This will get you a near perfect horn for what you are looking for. That will get you a horn profile. Click on the Hyp section and press T on your keyboard this will change the horn profile to Tractrix. Now simulate and fool around.
OK, thank you. I did that and the results are not much different for throat and mouth area from the spreadsheet. The SPL in quarter space shows -3dB about 68Hz. If I put it in a corner, the response flattens out and the -3dB goes down a few Hz. How do you get a horn profile from this program?
Attached Images
File Type: jpg 12PE32 60Hz tractrix input 2 screen.JPG (56.2 KB, 124 views)
File Type: jpg 12PE32 60Hz tractrix SPL new.JPG (44.2 KB, 122 views)

Last edited by dirkwright; 15th August 2011 at 01:32 PM.
  Reply With Quote
Old 15th August 2011, 01:33 PM   #2115
Mark Kravchenko --- www.kravchenko-audio.com
diyAudio Member
 
mwmkravchenko's Avatar
 
Join Date: Jan 2002
Location: Perth Canada
Change the Ang to 2 Pi and you will see the response that you can expect in a normal configuration. If you like that your golden.
__________________
Mark
  Reply With Quote
Old 15th August 2011, 01:38 PM   #2116
diyAudio Member
 
dirkwright's Avatar
 
Join Date: May 2011
Location: Virginia
Quote:
Originally Posted by mwmkravchenko View Post
Change the Ang to 2 Pi and you will see the response that you can expect in a normal configuration. If you like that your golden.
Thanks. I did that.

Looks kind of ragged to me. What can I do to make it smoother? Why do we have to jump through so many strange hoops to see a real world result?
Attached Images
File Type: jpg 12PE32 60Hz tractrix half space SPL.JPG (42.9 KB, 114 views)
  Reply With Quote
Old 15th August 2011, 01:42 PM   #2117
Mark Kravchenko --- www.kravchenko-audio.com
diyAudio Member
 
mwmkravchenko's Avatar
 
Join Date: Jan 2002
Location: Perth Canada
You have a perfect and I mean perfect response. That tiny bit of ripple will never be audible. And never see the light of day. It willl be worse in real life measurements. But that being said if you measure speaker you think sound pretty good you fall off of your chair when you look at the peaks and dips we hear in our listening rooms.

You have gotten where you wanted to without reading the sign posts buddy.
__________________
Mark
  Reply With Quote
Old 15th August 2011, 01:50 PM   #2118
diyAudio Member
 
dirkwright's Avatar
 
Join Date: May 2011
Location: Virginia
Quote:
Originally Posted by mwmkravchenko View Post
You have a perfect and I mean perfect response. That tiny bit of ripple will never be audible. And never see the light of day. It willl be worse in real life measurements. But that being said if you measure speaker you think sound pretty good you fall off of your chair when you look at the peaks and dips we hear in our listening rooms.

You have gotten where you wanted to without reading the sign posts buddy.
Thanks. I'm kind of known for not reading the sign posts...

How do I export the horn expansion so I can make this horn in real life?

Why doesn't the schematic show the horn ending in a 90degree flare? I thought tractrix horns were like that?

So this horn is supposed to be 1.6 meters long? dang that's big.
Attached Images
File Type: jpg 12PE32 60Hz tractrix schematic.JPG (30.7 KB, 116 views)
  Reply With Quote
Old 15th August 2011, 02:45 PM   #2119
Mark Kravchenko --- www.kravchenko-audio.com
diyAudio Member
 
mwmkravchenko's Avatar
 
Join Date: Jan 2002
Location: Perth Canada
Man !

I read through the manual and it is not that easy to send you to the right page and show you how to export the information.

So here goes.

Go to the Schematic page.

Click on file.

Export, horn data.

A box pops up.

If you are going to build a square horn you are good to go as Hornresp computes a square cross section to begin with.

If you want any other size alter the Height boxes S1...........

The Increment window can have larger values and save you on paper. I usually use 10 cm for a horn the size you are making.

25.4mm = 1 inch, 2.54 cm = 1 inch

Hit the ok button.

Name your file.

Go to your Hornresp installation folder and find the export folder.

In that export folder you will find the file you just created.

Open it up in Notepad or what ever word processor you have.

Print it.

Read until it makes sense.

The collums are as follows:


Length is the length from the driver towards the horn mouth

Area is the area of the horn at the specified length in square centimeters.
Radius is the radius of a circle of the same area as above.
Angle is the angle of the horn wall measured off of a flat plane where the driver bolts onto the horn.
Height Your on your own buddy.
Width ""
Width Flare is the type of horn Con Trac Hyp or Uni. Uni is a horn where you set up Hornresp to make a horn having two parallel side walls and the rest changes. In other words you are specifiying the horns width.
Side Length. See ""
__________________
Mark
  Reply With Quote
Old 15th August 2011, 02:47 PM   #2120
Mark Kravchenko --- www.kravchenko-audio.com
diyAudio Member
 
mwmkravchenko's Avatar
 
Join Date: Jan 2002
Location: Perth Canada
on another note. I have been playing with the latest and greatest.

Still have to mess with the tapped horn variations but as I remember this is pretty much going back to a way it wuz.

I like all the additions.

It's like getting new toys every time.

Face it we get older but we still like new toys!
__________________
Mark
  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 06:08 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