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

Golden ratio bass horn
Golden ratio bass horn
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 29th December 2017, 11:55 PM   #21
GM is offline GM  United States
diyAudio Member
 
GM's Avatar
 
Join Date: Jun 2003
Location: Chamblee, Ga.
Quote:
Originally Posted by planet10 View Post
GM, if you can point out what dimensions you need i will measure that. Horn is 2 small straight sections and 3 circlular sections.

dave
Can your program tell if it's expo, etc.? Regardless, every 3" like shown is plenty good enough and for this horn, maybe every 4" in the last, larger expansion. Once these are known it can be broken down into flat panels to 'trip up' its excessive HF.

GM
__________________
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote
Old 30th December 2017, 12:27 AM   #22
planet10 is online now planet10  Canada
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Golden ratio bass horn
I can only generate dimensions. 3 apart (at at least 1 end anyway) except where shown. The horn is primamrily formed by 3 circular sections shown in blue, red, purple.

Golden ratio bass horn-grhorn-detail-png

dave
Attached Images
File Type: png GRHorn-detail.png (20.4 KB, 370 views)
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 30th December 2017, 12:46 AM   #23
GM is offline GM  United States
diyAudio Member
 
GM's Avatar
 
Join Date: Jun 2003
Location: Chamblee, Ga.
OK, can you factor in the width to make each 'slice' an area dimension? Also, too little info [for me] to figure the area expansion for the circles. We need somebody with AutoCad......

GM
__________________
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote
Old 30th December 2017, 01:14 AM   #24
planet10 is online now planet10  Canada
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Golden ratio bass horn
I’m pretty sure my CAD software can do anything AutoCAD can… operator thou is not up to expert level.

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 30th December 2017, 01:19 AM   #25
globalplayer is offline globalplayer  Germany
diyAudio Member
 
globalplayer's Avatar
 
Join Date: Oct 2014
Location: =)
So it is a pi horn and not phi.
__________________
◢◣◢◣◢◣◢◣◢◣
  Reply With Quote
Old 30th December 2017, 05:50 AM   #26
GM is offline GM  United States
diyAudio Member
 
GM's Avatar
 
Join Date: Jun 2003
Location: Chamblee, Ga.
Quote:
Originally Posted by planet10 View Post
I’m pretty sure my CAD software can do anything AutoCAD can… operator thou is not up to expert level.

dave
Know that problem well, tried to learn AutoCAD in the '90s with zero help and before I got on-line and finally gave up as way too tedious plus the manual apparently assumed I'd taken a course in school.

GM
__________________
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote
Old 30th December 2017, 03:47 PM   #27
xrk971 is offline xrk971  United States
Got Foam?
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Metro DC area
Golden ratio bass horn
There’s a parametric curve genrator function. In Solidworks, you can place an image in your sketch plane (from a math plotting program or photo) as a visual guide and use several splines to fit any complex curve you like without entering an equation.
__________________
XRKaudio https://www.etsy.com/shop/XRKAudio
  Reply With Quote
Old 30th December 2017, 07:30 PM   #28
GM is offline GM  United States
diyAudio Member
 
GM's Avatar
 
Join Date: Jun 2003
Location: Chamblee, Ga.
Thanks!

Hmm, couldn't find a price, so assume only DIYers with 'deep pockets' can afford it.

GM
__________________
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote
Old 30th December 2017, 08:02 PM   #29
planet10 is online now planet10  Canada
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Golden ratio bass horn
I believe SolidWorks is in the thousands of dollars/seat. The sw i use is just over $1000.

dave
__________________
community sites t-linespeakers.org, frugal-horn.com, frugal-phile.com ........ commercial site planet10-HiFi
p10-hifi forum here at diyA
  Reply With Quote
Old 30th December 2017, 08:38 PM   #30
GM is offline GM  United States
diyAudio Member
 
GM's Avatar
 
Join Date: Jun 2003
Location: Chamblee, Ga.
Thanks! ...like I said....... Oh well, if you can give me enough 'pie slice' areas, I can try empirically finding a 'close enough' flare frequency, factor if it is indeed near enough expo.

GM
__________________
Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.
  Reply With Quote

Reply


Golden ratio bass hornHide 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
Golden Ratio vs Tower - what should I do? Nvr2manybikes Multi-Way 21 8th April 2013 04:11 PM
golden ratio. I dont get it murphythecat8 Multi-Way 84 14th December 2012 03:04 AM
The Golden Ratio Stage Stee Solid State 7 22nd February 2009 08:46 PM
Golden Ratio Height edjosh23 Full Range 13 3rd February 2009 09:52 PM
Golden ratio - Example? icebear Multi-Way 5 17th April 2004 08:40 PM


New To Site? Need Help?

All times are GMT. The time now is 11:13 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki