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 2nd January 2016, 02:31 AM   #11
atilsley is offline atilsley  Australia
diyAudio Member
 
Join Date: Aug 2008
Location: Sydney
Sanding complete, and second side panel added. Dampening to rear of chamber.

Driver cut-out to do, plus oil with a Teak proof tint added.

Heavy unit...looking forward to listening to them.

Thinking of using the left over CNC'd wood to make a concrete version of the horn.

Andrew
Attached Images
File Type: jpg glue up final.jpg (113.1 KB, 482 views)
File Type: jpg glue up other side.jpg (100.0 KB, 470 views)
  Reply With Quote
Old 2nd January 2016, 03:37 AM   #12
jwicaksana is offline jwicaksana  Indonesia
diyAudio Member
 
Join Date: Dec 2015
That looks really awesome. And I totally enjoy the music you ran thru this speaker.
__________________
Cheers,
Jonathan
  Reply With Quote
Old 4th January 2016, 09:42 AM   #13
atilsley is offline atilsley  Australia
diyAudio Member
 
Join Date: Aug 2008
Location: Sydney
Quote:
Originally Posted by jwicaksana View Post
That looks really awesome. And I totally enjoy the music you ran thru this speaker.
Thanks.

Finished sanding tonight....one cab started with dark Bees Wax. The finish is very soft to the touch, smooth.

Driver cut outs tomorrow, then fit cable, terminals, drivers....done.

A nice high end speaker, yet compact. Kits available.
Attached Images
File Type: jpg bees wax 1.jpg (95.2 KB, 426 views)
File Type: jpg bees wax 2.jpg (93.9 KB, 424 views)
  Reply With Quote
Old 4th January 2016, 01:15 PM   #14
perceval is online now perceval  Taiwan
diyAudio Member
 
perceval's Avatar
 
Join Date: Feb 2014
Location: Taiwan
Great! Looks very nice already!

Bees wax... that's a nice idea. Used to put that on my boots! Probably works well on wood too!
  Reply With Quote
Old 4th January 2016, 01:27 PM   #15
zman01 is online now zman01  Bangladesh
diyAudio Member
 
Join Date: Feb 2011
Location: Dhaka
Pics new CNC'd back loaded horn using 4 inch drivers
atilsley, looking good!
  Reply With Quote
Old 5th January 2016, 01:53 AM   #16
nigelwright7557 is offline nigelwright7557  United Kingdom
diyAudio Member
 
nigelwright7557's Avatar
 
Join Date: Apr 2008
Location: Carlisle, England
Very nice.

Good to see someone rounding the ports off on corners to get better transmission.

I see too many projects with ports with right angled square corners. They used to use right angled corners in trenches during the first world war to stop blasts travelling the full length.
The right angled corner just returns the blast the way it came.
Click the image to open in full size.
__________________
PCBCAD51 pcb design software. 2018 version out now with lower prices >> http://www.murtonpikesystems.co.uk
  Reply With Quote
Old 5th January 2016, 03:23 AM   #17
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
In a BLH, you want hard angle turns upstream to serve as low pass filters. You don't want mids or mid bass coming out. The mouth it makes sense to smooth from aesthetics and also to prevent a hard distance anchor for a reflection cancellation.
  Reply With Quote
Old 5th January 2016, 09:12 AM   #18
Scottmoose is offline Scottmoose  United Kingdom
diyAudio Member
 
Scottmoose's Avatar
 
Join Date: Mar 2005
Location: UK
Very pretty indeed.

Quote:
Originally Posted by nigelwright7557 View Post
I see too many projects with ports with right angled square corners. They used to use right angled corners in trenches during the first world war to stop blasts travelling the full length.
The right angled corner just returns the blast the way it came.
I fear you've somewhat missed the point. A smooth pathway in a back horn promotes maximum efficiency over its entire operating bandwidth, primarily affecting the shorter frequencies at the top end of that range. However, there are equally valid alternatives, one of which is to design the horn to include and use sharp bends, edges and CSA shifts at specific points in the expansion path as a functional part of the low-pass filter. So if you see them in a back horn, it does not necessarily mean it is a poor design. It might actually be the reverse.
__________________
"'That'll do", comes the cry of the perfectionist down the ages.' James May -The Reassembler
www.wodendesign.com Community sites www.frugal-horn.com http://frugal-phile.com/

Last edited by Scottmoose; 5th January 2016 at 09:17 AM.
  Reply With Quote
Old 6th January 2016, 02:59 AM   #19
SufferingArtist is offline SufferingArtist  Singapore
Banned
 
Join Date: Dec 2015
Location: Hell=Earth
Quote:
Originally Posted by atilsley View Post
Thanks.

Finished sanding tonight....one cab started with dark Bees Wax. The finish is very soft to the touch, smooth.

Driver cut outs tomorrow, then fit cable, terminals, drivers....done.

A nice high end speaker, yet compact. Kits available.
Point us to the kits, pronto!

btw, what's the -3db like for the bass if placed about a foot from a back wall?

thanks!
  Reply With Quote
Old 6th January 2016, 03:14 AM   #20
planet10 is offline 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
Andrew,

That is not really a horn, but an unstuffed end-loaded TL. I suspect it will have significant ripple in the response.

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

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 04:07 AM.


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