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 12th July 2019, 04:38 PM   #9691
1hiep0 is offline 1hiep0  United States
diyAudio Member
 
Join Date: Dec 2013
Location: San Diego
Hi David,
Could optimize feature be implemented? Sorry if already being requested.
Thanks,
  Reply With Quote
Old 12th July 2019, 05:17 PM   #9692
clf is offline clf
diyAudio Member
 
Join Date: Jun 2019
YouTube
  Reply With Quote
Old 13th July 2019, 08:15 AM   #9693
David McBean is offline David McBean  Australia
diyAudio Member
 
Join Date: Jun 2007
Hi clf,

Quote:
Originally Posted by clf View Post
when you are trying to fine tune your horn / design would it be of benefit to do so with all possible pages to be displayed
See point 2 in Post #9256: Hornresp

Quote:
Originally Posted by clf View Post
what level of compression is ok and not affect the sound quality and how far down the horn would this pressure need to travel before expanding.
It really depends on the output power level, but as a general rule for a bass horn, a compression ratio not exceeding 4:1 should be okay for all but the most extreme cases. It is not possible to give a definitive answer to the second part of your question - obviously though, the lower the expansion rate near the throat, the higher the distortion.

Quote:
Originally Posted by clf View Post
are round horns better
It depends on what you are trying to achieve. For example, there is little scope for independently controlling the horizontal and vertical directivities of a round horn, whereas this is possible to some degree with a rectangular cross-section horn.

For bass horns, a rectangular cross-section is fine.

Kind regards,

David
__________________
www.hornresp.net
  Reply With Quote
Old 13th July 2019, 08:33 AM   #9694
David McBean is offline David McBean  Australia
diyAudio Member
 
Join Date: Jun 2007
Quote:
Originally Posted by 1hiep0 View Post
Could optimize feature be implemented?
Hi 1hiep0,

The problem is what to optimise. All loudspeaker designs are compromised one way or another. It is really up to the Hornresp user to decide which parameter(s) to optimise depending upon the outcome they wish to achieve. The slider controls in the real-time Loudspeaker Wizard are provided to hopefully make this task a little easier. Realistically though, this is about as far as it is practically possible to go.

Kind regards,

David
__________________
www.hornresp.net
  Reply With Quote
Old 13th July 2019, 05:56 PM   #9695
GM is offline GM  United States
diyAudio Member
 
GM's Avatar
 
Join Date: Jun 2003
Location: Chamblee, Ga.
Agreed, with the wizard, you don't need to know hardly anything about the fundamentals of speaker design. I was rather surprised that some early 'freehand', totally 'off the wall' TH alignments by [admittedly clueless] others that conformed to no acoustically derived theory I'm aware of proved better overall in some cases than the best of what traditional speaker/horn theory predicted!

GM
__________________
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote
Old 13th July 2019, 09:22 PM   #9696
clf is offline clf
diyAudio Member
 
Join Date: Jun 2019
Hi David,
Thanks for answering my questions
Multiple menus, it seems this change would require extensive work and time to change so I understand your reluctance to do so.
Level of compression, the horns will be used in a DJ / Band setup so I’m looking to maximize the output but still want it to sound really good, judging by what you say 4:1 compression is the max, would less compression say 2:1 sound better
If the Compression & Expansion of the horn all happened within the first quarter or half of the horn, would that provide a good sound quality and dB output
Are Round Horns Better, I know that round horns take up a lot more room and don’t forget about the construction difficulties but forget about that for a moment, is there any benefit in sound quality and output level, maybe less reflection back when folding the expanding horn
I was considering constructing the first 2/3 as round and as the horn expands to about 600mm, begin to make it rectangular as it expands to 800mm x 1000mm with an area of say 8000 or maybe larger say 10000
The drivers will be 2 x 18’’ or what is required, I’m trying to get high output and good quality for the size of sub’s (better than you can buy)
Kind regards
  Reply With Quote
Old 14th July 2019, 06:52 AM   #9697
David McBean is offline David McBean  Australia
diyAudio Member
 
Join Date: Jun 2007
Default Hornresp Update 5030-190714

Hi Everyone,

CHANGE 1

A ninth order band pass enclosure loudspeaker option has been added. Attachments 1 and 2 refer.

CHANGE 2

An externally-vented port tube in a band pass, DBR or ABC system can now be replaced by one or more passive radiators.

To specify a passive radiator in a band pass, DBR or ABC system, press the Ctrl key and double-click the Fr label while in edit mode. Press the Ctrl key and double-click the Sp1 label to specify multiple passive radiators. Double-click the Sp1 to Sp9 label to restore the default Fr label.

To replace an externally-vented port tube with a specified passive radiator, double-click on the Ap1, Ap2 or Ap3 label for that port. The label changes to Mma and the Mma text box value becomes the mass in grams added to each passive radiator diaphragm.

To select the alternative externally-vented port in a BP6P, BP7, BP9 or ABC system, double click on the Ap label for that other port.

To remove a passive radiator and restore the port tube, double-click on the Mma label in edit mode.

Attachments 3, 4 and 5 refer.

CHANGE 3

When activated by double-clicking on a chart, the green fundamental resonance marker in the band pass enclosure loudspeaker wizard is now also shown on the port velocity charts. Attachment 6 refers.

CHANGE 4

Individual acoustic power output charts have been added to the band pass enclosure loudspeaker wizard. Attachment 7 refers.

BUG FIX

Changes made in the band pass wizard to BP5 chamber 3 and port 3 values, and to BP7 port 3 values, were not being saved back to the input parameters window. This has now been fixed.

Kind regards,

David
Attached Images
File Type: png Attach_1.png (40.7 KB, 91 views)
File Type: png Attach_2.png (47.3 KB, 91 views)
File Type: png Attach_3.png (53.8 KB, 89 views)
File Type: png Attach_4.png (54.5 KB, 86 views)
File Type: png Attach_5.png (47.8 KB, 85 views)
File Type: png Attach_6.png (59.4 KB, 27 views)
File Type: png Attach_7.png (58.3 KB, 21 views)
__________________
www.hornresp.net
  Reply With Quote
Old 14th July 2019, 08:29 AM   #9698
freddi is offline freddi  United States
diyAudio Member
 
freddi's Avatar
 
Join Date: Aug 2005
Hornresp
"Christmas in July" Indeed !!!
  Reply With Quote
Old 14th July 2019, 08:42 AM   #9699
David McBean is offline David McBean  Australia
diyAudio Member
 
Join Date: Jun 2007
Quote:
Originally Posted by clf View Post
I’m trying to get high output and good quality for the size of sub’s
Hi clf,

If the bass horns are to be used in a DJ / Band environment, and assuming that the input power is not unrealistically high, I would be surprised if you could discern any meaningful difference in sound quality by using a compression ratio of 2:1 rather than 4:1, or by using an initial round rather than rectangular, horn cross-section.

Others with more practical experience in such matters might like to comment also, particularly if they have a view different to mine :-).

Kind regards,

David
__________________
www.hornresp.net
  Reply With Quote
Old 14th July 2019, 08:46 AM   #9700
David McBean is offline David McBean  Australia
diyAudio Member
 
Join Date: Jun 2007
Quote:
Originally Posted by freddi View Post
"Christmas in July" Indeed !!!
Merry Christmas Fred :-).
__________________
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 04:24 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio
Wiki