Hornresp - Page 10 - 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 4th June 2008, 07:18 AM   #91
diyAudio Member
 
Join Date: Jun 2007
Quote:
Originally posted by Kolbrek
Many years ago I built a clone of the Unity horn. The measured throat impedance of this horn (where the HF driver attaches) was exactly as Hornresp predicted, and started to fall below about 10kHz.
Hi Bjørn,

Many thanks for confirming that the Hornresp prediction for the throat impedance of a conical horn is reasonably accurate.

Kind regards,

David
  Reply With Quote
Old 4th June 2008, 07:29 AM   #92
diyAudio Member
 
Join Date: Jun 2007
Default Re: Re: HORNRESP VERSION 19.20

Quote:
Originally posted by iand
Now that the areas can be changed as well as tap points, it would be really helpful if a window showed the total system volume as the sliders are dragged.
Hi Ian,

Comment noted - stay tuned :-).

Kind regards,

David
  Reply With Quote
Old 4th June 2008, 07:49 AM   #93
diyAudio Member
 
Join Date: Jun 2007
Quote:
Originally posted by MikeHunt79
David, I'm loving the new version, keep up the good work.
Thanks Mike, I'll try to :-).

Kind regards,

David
  Reply With Quote
Old 4th June 2008, 10:18 AM   #94
diyAudio Member
 
Join Date: Nov 2006
Quote:
Originally posted by paulspencer
[B]Fantastic to see the new changes to hornresp. I had a look at the tapped horn wizard. I notice that it now has a max spl feature which is very handy.
Can´t find it in the wizards dialog. Is it hidden? Just downloaded the recent build.
Maybe I need more coffee
  Reply With Quote
Old 4th June 2008, 02:59 PM   #95
diyAudio Member
 
Join Date: Jun 2007
Quote:
Originally posted by Sabbelbacke

Can´t find it in the wizards dialog. Is it hidden? Just downloaded the recent build.
Maybe I need more coffee
Hi Sabbelbacke,

I can't find it in the Tapped Horn Wizard either :-).

I think that Paul is probably just using the Maximum SPL tool in conjunction with the TH Wizard tool.

Perhaps he could do with some of your coffee :-).

Kind regards,

David
__________________
www.hornresp.net
  Reply With Quote
Old 4th June 2008, 08:48 PM   #96
diyAudio Member
 
cowanaudio's Avatar
 
Join Date: Jul 2004
Location: Canberra, Australia
G'day Paul

That's the conclusion I have come to as well. I recently built a pair of 32Hz tapped horns using Peerless XLS 12" drivers for a friend. When pushed you could smell the voice coils, yet excusion was less than half what these drivers are capable of. The extra excursion does buy you quite a bit of protection below cut off.

I'm going to have a play with some 4" coil pro drivers with a lower x-max and see how they go.

David, your little program keeps getting better and better. I'm so glad the goup has been able to keep you motivated!

Cheers

William Cowan
  Reply With Quote
Old 5th June 2008, 08:06 AM   #97
diyAudio Member
 
paulspencer's Avatar
 
Join Date: Sep 2003
Location: Melbourne, Australia
Yes, Paul was using both tools, it was quite clever of him don't you think?! After you have run calcs, the max SPL option comes up. I used to just keep increasing the input until I went beyond what my amp could do or max excursion was predicted. Now I reach that point much quicker.

William,
This makes me wonder what driver is best for a sub tapped horn. I start to think of a pro driver with 7mm xmax and 95db sensitivity. If you look at Danley's tower of power, 1000 watts at 95 db sensitivity gets 125 db down to 18 Hz. If the horn itself does not boost sensitivity, how do you get a 12" driver which would normally only go to about 40 Hz to reach down to 18 Hz?

I've had a play with a pro driver - Beyma 12" SM212 with 7mm xmax and it can pump out 125db but it won't go below 30 Hz. It only needs 50w to hit that level in a corner. While that sounds decent, I can get more output out of an AV12 drivers and deeper extension with more power.

I'm having a look at this again since I'm looking at how I can squeeze the most out of that pair of AV12 drivers for a home theatre for a friend. If my friend is happy with the idea, he might actually go for that huge 20 Hz bass horn that I was hoping to build in the past but didn't when I found the room really wasn't big enough, and I have neighbour issues! My friend could actually use the thing. So it's a choice between vented, tapped or horn. But now I'm getting off topic!
  Reply With Quote
Old 5th June 2008, 05:58 PM   #98
diyAudio Member
 
MikeHunt79's Avatar
 
Join Date: Aug 2003
Location: Bristol, UK
Quote:
Originally posted by cowanaudio
I'm going to have a play with some 4" coil pro drivers with a lower x-max and see how they go.
Try modeling the Eminence Definimax 4012 in your 30Hz TH. I found it works rather well, it only really runs low on xmax below 30Hz and maybe around 40Hz also. It also has a 4" voicecoil, and it doesn't get hot when pushed, but I didn't put more than 300W into mine.

In fact I've been playing around with the "Active EQ"on my DCX2496, and found it can limit different amounts at different frequencies.

I've been using Hornresp with various voltages to find where my driver will run out of xmax at different frequencies... I was thinking it would be really to have a voltage plot on the "Max SPL" curve. Would this be possible?

So I put in say 5mm xmax, 300W power, and hornresp would produce a voltage curve as well as an SPL one. Perhaps the scale for voltage could be on the right have side and the curve itseld could be a different colour so it won't get mixed up with the SPL curve?

I'm not sure if this is possible as I'm not really sure quite how all the maths behind this works... but if it is that would be a great feature IMO.
  Reply With Quote
Old 5th June 2008, 10:33 PM   #99
iand is offline iand  United Kingdom
diyAudio Member
 
Join Date: Feb 2007
Location: London
Quote:
Originally posted by MikeHunt79

Try modeling the Eminence Definimax 4012 in your 30Hz TH. I found it works rather well, it only really runs low on xmax below 30Hz and maybe around 40Hz also. It also has a 4" voicecoil, and it doesn't get hot when pushed, but I didn't put more than 300W into mine.

In fact I've been playing around with the "Active EQ"on my DCX2496, and found it can limit different amounts at different frequencies.

I've been using Hornresp with various voltages to find where my driver will run out of xmax at different frequencies... I was thinking it would be really to have a voltage plot on the "Max SPL" curve. Would this be possible?

So I put in say 5mm xmax, 300W power, and hornresp would produce a voltage curve as well as an SPL one. Perhaps the scale for voltage could be on the right have side and the curve itseld could be a different colour so it won't get mixed up with the SPL curve?

I'm not sure if this is possible as I'm not really sure quite how all the maths behind this works... but if it is that would be a great feature IMO.
If a 15" driver will fit try the BMS 15N850, this doesn't run out of Xmax even at 1200W input.

Ian
  Reply With Quote
Old 6th June 2008, 01:49 PM   #100
diyAudio Member
 
Join Date: Jun 2007
Quote:
Originally posted by cowanaudio
David, your little program keeps getting better and better. I'm so glad the group has been able to keep you motivated!
Hi William,

If you like the current Tapped Horn Wizard tool, then I think you are probably going to love the next enhancement :-). It is most likely about a week or so away, if all goes according to plan.

I am not sure that I would describe Hornresp as a "little" program though - the source code for Version 19.20 fills over 500 A4 pages when printed out :-).

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 02:22 PM.


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