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

Pics new CNC'd back loaded horn using 4 inch drivers
Pics new CNC'd back loaded horn using 4 inch drivers
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 6th January 2016, 11:12 AM   #21
xrk971 is offline xrk971  United States
Got Foam?
diyAudio Member
 
xrk971's Avatar
 
Join Date: Oct 2012
Location: Metro DC area
Pics new CNC'd back loaded horn using 4 inch drivers
I don't have any dimensions but guessing based on driver bezel width, the length of the TL is about 1 meter. As it is expanding slightly and not tapered down to smaller terminus, the resonance frequency will be a bit higher than the 90Hz quarterwave frequency. So maybe 93Hz extension. If my 1m estimation is totally off than that number is subject to change.
  Reply With Quote
Old 6th January 2016, 11:44 PM   #22
atilsley is offline atilsley  Australia
diyAudio Member
 
Join Date: Aug 2008
Location: Sydney
Quote:
Originally Posted by xrk971 View Post
I don't have any dimensions but guessing based on driver bezel width, the length of the TL is about 1 meter. As it is expanding slightly and not tapered down to smaller terminus, the resonance frequency will be a bit higher than the 90Hz quarterwave frequency. So maybe 93Hz extension. If my 1m estimation is totally off than that number is subject to change.
Correct, 1m is spot on. I'll provide some graphs once the drivers are fitted...though I'm away on hols for two weeks from tomorrow. It will need to wait.

Dave, a rippled sweep doesn't necessarily tell the whole story when listening to high efficient, detailed speakers....though clearly to get it smooth is theoretically ideal. Lowther speakers historically, for example, are not smooth/flat, yet people love them for their attributes.

My main goal is to build an attractive and small desktop/standmount speaker, that has better output than a standard ported unit. The horn/TL provides that...and the curved CNC gives it an exotic appeal.

Regards.

Andrew
  Reply With Quote
Old 7th January 2016, 12:36 AM   #23
planet10 is online now planet10  Canada
frugal-phile(tm)
diyAudio Moderator
 
planet10's Avatar
 
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Pics new CNC'd back loaded horn using 4 inch drivers
Quote:
Originally Posted by atilsley View Post
a rippled sweep doesn't necessarily tell the whole story when listening to high efficient, detailed speakers....though clearly to get it smooth is theoretically ideal
agreed.

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 23rd January 2016, 10:26 AM   #24
atilsley is offline atilsley  Australia
diyAudio Member
 
Join Date: Aug 2008
Location: Sydney
Back from hols...so keen to get these ready for testing. Bees wax on, terminals on, cable in (braided Cat5).
Attached Images
File Type: jpg both stained 1.jpg (108.0 KB, 373 views)
  Reply With Quote
Old 24th January 2016, 06:46 AM   #25
atilsley is offline atilsley  Australia
diyAudio Member
 
Join Date: Aug 2008
Location: Sydney
Now playing...very detailed and magic sound stage...the sound is pushed back a meter...the speakers really vanish. Just moderate vol for now. Happy. The stools help with toe-in tweaks...!
Attached Images
File Type: jpg cable 2.jpg (120.5 KB, 327 views)
File Type: jpg playing single.jpg (84.1 KB, 319 views)
  Reply With Quote
Old 26th January 2016, 09:15 PM   #26
chrisb is offline chrisb
diyAudio Member
 
Join Date: Aug 2002
Location: victoria BC
Andrew - aside from my aversion to the stacked lamination method from the point of view of material waste, those are particularly pretty, but to expect much deep bass from the 108 EZ in any compact enclosure is probably a pipe dream
__________________
kinda burnt out - taking a break
  Reply With Quote
Old 27th January 2016, 01:58 AM   #27
atilsley is offline atilsley  Australia
diyAudio Member
 
Join Date: Aug 2008
Location: Sydney
Quote:
Originally Posted by chrisb View Post
Andrew - aside from my aversion to the stacked lamination method from the point of view of material waste, those are particularly pretty, but to expect much deep bass from the 108 EZ in any compact enclosure is probably a pipe dream
Thanks Chris, I agree re the bass. They're a small speaker designed for quality sound near-field. Having said that, I was enjoying listening to Leonard Cohen's very rich deep voice the other day in the Dublin Live concert. They performed very well.

On wastage, I'm intending to use the remaining CNC'd "outer" material to create a foam or concrete horn to test the method.
  Reply With Quote
Old 3rd January 2018, 08:43 AM   #28
tommyren is offline tommyren
diyAudio Member
 
Join Date: Jan 2018
All right, letīs bring this back from the dead
atilsley, almost one year after last post, do you still use these speakers and what is your verdict on them today?

best regards
Tommy
  Reply With Quote

Reply


Pics new CNC'd back loaded horn using 4 inch driversHide 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
Front loaded and back loaded horn DrWoofer.com Subwoofers 14 12th April 2016 08:32 PM
Is this a back-loaded horn? zcables Multi-Way 3 17th September 2012 04:48 PM
Combination of Back-loaded Horn and Fron loaded horn?! ARIYAHOOR Full Range 26 1st June 2012 09:20 PM
Back Loaded Type Horns using Fostex 4 inch FE 103E Single Drivers. davidhugo Full Range 12 18th December 2009 07:27 PM
Pics of CNC routered Big Fun Horn atilsley Full Range 6 22nd October 2008 08:53 PM


New To Site? Need Help?

All times are GMT. The time now is 11:15 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