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

Multi-Way Conventional loudspeakers with crossovers

The construction of a multicell horn
The construction of a multicell 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 20th January 2009, 08:13 PM   #1
Petter Persson is offline Petter Persson  Sweden
diyAudio Member
 
Join Date: Sep 2007
Default The construction of a multicell horn

I'll try my best to inspire and to show to you that everything is possible. To do a multicellular horn takes a while due to all different moments but they are all kind of nice and it feels good to see the horn grow with every hour of work.

These horns are NOT a Altec 1505B copy. They are pure exponential with a flare frequency of 183 Hz, the same, or at least what was my and reVintages intentions bacause the throat flare in JBL 2441 and 2445.

The horns are built out of 3 mm Baltich Birch plywood, filled with polyester and the outher sides are covered with polyester and glass fibers.

Enjoy
Attached Files
File Type: zip Multicell horn sheet.zip (5.1 KB, 639 views)

Last edited by Pano; 12th April 2018 at 12:40 AM. Reason: added spreadsheet
  Reply With Quote
Old 20th January 2009, 08:14 PM   #2
Petter Persson is offline Petter Persson  Sweden
diyAudio Member
 
Join Date: Sep 2007
Construction of a mold

An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.



An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.



Was later copied so the mold became symmetrical

An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.



An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.


An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.
Attached Images
File Type: jpg Horn-1.jpg (25.4 KB, 2391 views)
File Type: jpg Horn-2.jpg (35.2 KB, 2451 views)
File Type: jpg Horn-3.jpg (39.1 KB, 2505 views)
File Type: png Horn-4.png (3.3 KB, 2500 views)
File Type: jpg Horn-5.jpg (32.6 KB, 2465 views)
File Type: jpg Horn-6.jpg (29.2 KB, 1954 views)
File Type: jpg Horn-7.jpg (27.3 KB, 1938 views)
File Type: jpg Horn-8.jpg (51.2 KB, 1731 views)
  Reply With Quote
Old 20th January 2009, 08:15 PM   #3
Petter Persson is offline Petter Persson  Sweden
diyAudio Member
 
Join Date: Sep 2007
Good start

An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.



Some help from a friend

An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.



An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.



An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.



An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.



An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.



An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.



An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.



An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.
Attached Images
File Type: jpg Horn-9.jpg (32.6 KB, 1418 views)
File Type: jpg Horn-10.jpg (23.4 KB, 1366 views)
File Type: jpg Horn-11.jpg (23.5 KB, 1411 views)
File Type: jpg Horn-12.jpg (60.2 KB, 1387 views)
File Type: jpg Horn-13.jpg (27.7 KB, 1342 views)
File Type: jpg Horn-14.jpg (29.6 KB, 1557 views)
  Reply With Quote
Old 20th January 2009, 08:16 PM   #4
Petter Persson is offline Petter Persson  Sweden
diyAudio Member
 
Join Date: Sep 2007
So the cells have zero edge width at their beginning.

An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.


An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.


An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.


An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.


An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.
Attached Images
File Type: jpg Horn-15.jpg (35.6 KB, 1107 views)
File Type: jpg Horn-16.jpg (30.8 KB, 1009 views)
File Type: jpg Horn-17.jpg (22.5 KB, 1128 views)
File Type: jpg Horn-18.jpg (36.8 KB, 1226 views)
File Type: jpg Horn-19.jpg (28.9 KB, 1100 views)
File Type: jpg Horn-20.jpg (44.7 KB, 1050 views)
File Type: jpg Horn-21.jpg (25.4 KB, 1003 views)
File Type: jpg Horn-23.jpg (32.2 KB, 1042 views)
File Type: jpg Horn-24.jpg (46.3 KB, 1252 views)
File Type: jpg Horn-25.jpg (29.5 KB, 1424 views)
  Reply With Quote
Old 20th January 2009, 08:18 PM   #5
Petter Persson is offline Petter Persson  Sweden
diyAudio Member
 
Join Date: Sep 2007
One side was taped

An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.


And filled with polyester

An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.


An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.


An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.


An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.


An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.


An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.


An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.


An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.


An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.


An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.


An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.
Attached Images
File Type: jpg Horn-26.jpg (38.3 KB, 904 views)
File Type: jpg Horn-27.jpg (31.9 KB, 1145 views)
File Type: jpg Horn-28.jpg (45.0 KB, 1514 views)
File Type: jpg Horn-29.jpg (47.3 KB, 1512 views)
File Type: jpg Horn-30.jpg (43.1 KB, 1283 views)
File Type: jpg Horn-31.jpg (21.2 KB, 1167 views)
  Reply With Quote
Old 20th January 2009, 08:20 PM   #6
Petter Persson is offline Petter Persson  Sweden
diyAudio Member
 
Join Date: Sep 2007
Construction of adapter

An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.


An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.


An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.


An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.


An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.


An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.


An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.


An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.


An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.
Attached Images
File Type: jpg Horn-32.jpg (71.6 KB, 878 views)
File Type: jpg Horn-33.jpg (22.3 KB, 837 views)
File Type: jpg Horn-34.jpg (27.5 KB, 700 views)
File Type: jpg Horn-35.jpg (52.7 KB, 812 views)
File Type: jpg Horn-36.jpg (48.8 KB, 854 views)
File Type: jpg Horn-37.jpg (26.7 KB, 962 views)
File Type: jpg Horn-38.jpg (29.1 KB, 912 views)
File Type: jpg Horn-39.jpg (48.2 KB, 865 views)
File Type: jpg Horn-40.jpg (41.8 KB, 1010 views)
  Reply With Quote
Old 20th January 2009, 08:21 PM   #7
Petter Persson is offline Petter Persson  Sweden
diyAudio Member
 
Join Date: Sep 2007
X-mas

An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.





Finish!

Sorry for the filter, the layout is just preliminary and will be changed.

An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.


An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.


An externally hosted image should be here but it no longer works. Please upload images instead of linking to them to prevent this.



The crossover at 500 (12 db electrical) and 3000 Hz (6 dB electrical)

Sounds like heaven

If you have any questions/comments please post them and I'll try to answer.



Thanks! / Petter, Sweden
Attached Images
File Type: jpg Horn-41.jpg (26.0 KB, 1172 views)
File Type: jpg Horn-42.jpg (31.5 KB, 1480 views)
File Type: jpg Horn-43.jpg (37.0 KB, 1550 views)
File Type: jpg Horn-44.jpg (20.7 KB, 1601 views)
  Reply With Quote
Old 20th January 2009, 08:40 PM   #8
WithTarragon is offline WithTarragon  United States
diyAudio Member
 
Join Date: Jun 2007
Excellent Work!!!!!!!!

That was a very nice project. Very, very nice.
I was a bit confused on the throat adapter's construction. I may just need to look at it more closely.

Have you had a chance to make any acoustic measures of the horn, especially the polars?

Thank you very much for posting this
  Reply With Quote
Old 20th January 2009, 09:26 PM   #9
Helmuth is offline Helmuth  Netherlands
diyAudio Member
 
Helmuth's Avatar
 
Join Date: Oct 2008
Location: Winterswijk
Looks great Petter,

Thanks for sharing your solution how to construct the horn.
__________________
( (( KUGELWELLE )) )
recent projects :OB-mk1 /fatboy / monitor-xl / Horn-AM / dappolito / td124-mk1-rb301 / Hybrid-pse / Vfet
  Reply With Quote
Old 21st January 2009, 03:10 AM   #10
bear is offline bear
diyAudio Member
 
bear's Avatar
 
Join Date: Apr 2002
Location: New York State USA
Very nice work...

If you measure them I'll be curious to see what the real F3 freq works out to be (sans xover), given the mouth size and the flare rate being 183Hz...

I have Altec 1003s, 803s and 203s here to play with... I like that they go to <300Hz. Makes the xover to midbass much better, imho.

One of the real problems with any horn is that there is significant energy there, and the sides of the horn, especially with the thin walls of the multicells (or anything made with thin wood or steel) are not sufficiently stiff... I've had to reinforce the walls of my 203s (for example) which makes a world of difference.

Among the best of the WE and Altec multicells are the ones that are "Tar Filled" - a big hunk of heavy dried asphalt/tar that was moulded around the whole thing... dead and heavy.

So I was wondering what you did about that, if anything with your wood horns. I did notice what looked like some fiberglass over the cells of the completed horn... hard to tell from the pix what it is for?

Btw, they look wonderful!
Nice work...

_-_-bear
__________________
_-_-bear
http://www.bearlabs.com -- Btw, I don't actually know anything, FYI -- every once in a while I say something that makes sense... ]
  Reply With Quote

Reply


The construction of a multicell 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
How to DIY a wooden multicell Horn Jimmy DIY Multi-Way 11 1st October 2008 08:32 PM
horn construction concerns... Nanook Full Range 0 8th September 2007 03:17 AM
Construction technique straight horn mashaffer Subwoofers 5 14th June 2006 05:25 PM


New To Site? Need Help?

All times are GMT. The time now is 10:50 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio
Wiki