Celestion Contest Entry, Dual CF1840 TH - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers

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 22nd May 2014, 10:29 PM   #1
sine143 is online now sine143  United States
diyAudio Member
 
Join Date: May 2010
Default Celestion Contest Entry, Dual CF1840 TH

So Celestion recently hosted a speaker design contest (ended yesterday) for their CF1840JD 18" drivers.

now... overall, this driver looks like an ideal 40hz bassreflex dual 18, (volume aroune 375 liters) with a fairly low driver mass, but that seemed a bit too simple to win a contest, so I designed a dual tapped horn in about 4 days.

Its pretty big (no where near as big as a FLH would be for this cut off) but the results are decent, about 2 to 3 db in sensitivity advantage. dimensions (external) are 60w X 38d X 24h. limit is around 73 v.

Anyways... If I DO win... I'll probably just build bass reflex boxes, but it was a fun exercise in speed of design/fold with an unknown driver.
Attached Images
File Type: jpg celestion contest entry.jpg (374.6 KB, 82 views)
  Reply With Quote
Old 22nd May 2014, 10:38 PM   #2
diyAudio Member
 
Join Date: Nov 2007
Did the design call for the use of two of the drivers?
__________________
www.diysubwoofers.org
  Reply With Quote
Old 22nd May 2014, 10:51 PM   #3
sine143 is online now sine143  United States
diyAudio Member
 
Join Date: May 2010
yep... required you use 2... thus, the behemoth.
  Reply With Quote
Old 22nd May 2014, 11:21 PM   #4
Zero D is online now Zero D  United Kingdom
diyAudio Member
 
Join Date: Aug 2009
@ sine143

Hi & well done, looks good

Architechs Specs

All the best with it
  Reply With Quote
Old 22nd May 2014, 11:22 PM   #5
sine143 is online now sine143  United States
diyAudio Member
 
Join Date: May 2010
yeah I kinda figure i'm doomed though cause IDK if Celestion will want to ship a prize to the USA lol.
  Reply With Quote
Old 22nd May 2014, 11:32 PM   #6
Zero D is online now Zero D  United Kingdom
diyAudio Member
 
Join Date: Aug 2009
Why doomed ?

Celestion are also in the USA & have dealers there too
  Reply With Quote
Old 23rd May 2014, 01:58 AM   #7
sebDIY is offline sebDIY  Belgium
diyAudio Member
 
Join Date: Oct 2011
Interesting design, even if it's big. But why 2.83 volts 4 Ohms? It is two watts not one. It would make more sense to provide sensitivity at 1 watt so 2 volts 4 ohms.
  Reply With Quote
Old 23rd May 2014, 02:45 AM   #8
sine143 is online now sine143  United States
diyAudio Member
 
Join Date: May 2010
Danley precedent. Post everything at 2.83v regardless of impedance
  Reply With Quote
Old 26th May 2014, 04:30 AM   #9
diyAudio Member
 
bitSmasher's Avatar
 
Join Date: Jun 2012
Location: Sydney.Au
I c a typo
  Reply With Quote
Old 26th May 2014, 06:21 AM   #10
sine143 is online now sine143  United States
diyAudio Member
 
Join Date: May 2010
Exursion lol
  Reply With Quote

Reply


Hide 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Entry Level Turntable Telemin Analogue Source 30 10th September 2009 10:06 PM
My first entry into the DIY loudspeakers. ibanezcollector Multi-Way 15 9th January 2006 12:49 PM
entry level velodyne RockysDad Subwoofers 3 18th December 2005 06:04 AM
Celestion G-18C and Tannoy dual concentric 12 inch both 100 W! Should I get them ? VvvvvV Multi-Way 0 17th May 2005 06:17 PM
Name contest RAW Multi-Way 0 13th June 2003 01:14 PM


New To Site? Need Help?

All times are GMT. The time now is 08:20 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2