Best DIY sub for 18" driver - 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 5th November 2009, 06:15 AM   #1
juxta is offline juxta  Australia
diyAudio Member
 
Join Date: Nov 2009
Location: Tasmania
Default Best DIY sub for 18" driver

What's the best DIY sub design to utilise a 18" Driver?

Tapped horn?


Bill Fitz Maurice?
  Reply With Quote
Old 5th November 2009, 07:01 AM   #2
diyAudio Member
 
Moondog55's Avatar
 
Join Date: Jun 2007
Location: Norlane; Geelong: Victoria: Australia
Perhaps you need to tell us which driver you have, horses for courses and all that.
Personally I like the Kicker CVR 18 in a 250liter sealed box but I can't afford the postage from England and my mate won't sell his
__________________
QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"
  Reply With Quote
Old 5th November 2009, 08:26 AM   #3
diyAudio Member
 
Join Date: Jun 2005
Location: Singapore
What about a transmission line? I wonder why they are not popular anymore these days among the diy community...
  Reply With Quote
Old 5th November 2009, 08:46 AM   #4
juxta is offline juxta  Australia
diyAudio Member
 
Join Date: Nov 2009
Location: Tasmania
Quote:
Originally Posted by rhapsodee View Post
What about a transmission line? I wonder why they are not popular anymore these days among the diy community...
Whats a transmission line?

I use the system 4xKlipsch 3 ways outdoor, have heard the tapped horn can be very efficient, maybe I could just use a 15" and maybe build another down the line..
  Reply With Quote
Old 5th November 2009, 09:47 AM   #5
diyAudio Member
 
Join Date: Aug 2009
if you're going hornload and a 18 incher you're going to end up with a huge cab. not, 15 inchers won't be small either if you want them to go low and loud.
  Reply With Quote
Old 5th November 2009, 11:31 AM   #6
juxta is offline juxta  Australia
diyAudio Member
 
Join Date: Nov 2009
Location: Tasmania
Quote:
Originally Posted by polviggen View Post
if you're going hornload and a 18 incher you're going to end up with a huge cab. not, 15 inchers won't be small either if you want them to go low and loud.
Size doesn't matter too much, if it will fit in a trailer i can shift it.

Any pics, info, plan suggestions would be great!

Thanks for the replies
  Reply With Quote
Old 5th November 2009, 12:03 PM   #7
diyAudio Member
 
davygrvy's Avatar
 
Join Date: Mar 2007
Location: Oakland, CA
Blog Entries: 1
In general, 18s are too fragile to be used in a bass horn due to the pressure at the throat which tears the cone. Bigger doesn't really mean better.

If you had say... nine 8" MCM 55-2421 woofers you'd have a total Sd of 1872cc. With an Xmax of 8mm that's a Vd of 14976cm3. An 18" has an Sd of around 962cc, so that'd need 15.5mm of Xmax to equal this cloud-9 array. Power handling would be just short of 1kW.

Oh, and the MCMs can survive a really high compression ratio for use in very efficient horns which make a lot of pressure at the throat. Shhh... don't tell everyone.

With the MCMs at around $25 each with a coupon code, sell your 18" before others learn about this.

Last edited by davygrvy; 5th November 2009 at 12:14 PM.
  Reply With Quote
Old 5th November 2009, 06:24 PM   #8
diyAudio Member
 
Join Date: Jul 2008
Location: Pacific Northwest
Shhhhhh. I thought I told you this was a secret.

Keep it down - now everyone will know......

Oh - wait - I posted all the details of my quad 6" driver powered (tang band W6-1139) tapped horn earlier...

Multiple small drivers in a high-compression ratio horn (or tapped horn) can certainly be a good thing. I know I certainly have plans for my version of a 6-pack.

Many hands make light work.
  Reply With Quote
Old 5th November 2009, 09:14 PM   #9
diyAudio Member
 
Join Date: Jan 2005
Location: Rotterdam, NL
Quote:
In general, 18s are too fragile to be used in a bass horn due to the pressure at the throat which tears the cone.
"Coughh"

No offence, but there is such a massive amount of 18" horns used in professional audio (PA) that it should end any discussion, about that subject, before it begins.

Regards Johan
__________________
Impossibilities we do immediatly, miracles take slightly longer.
  Reply With Quote
Old 5th November 2009, 09:38 PM   #10
diyAudio Member
 
davygrvy's Avatar
 
Join Date: Mar 2007
Location: Oakland, CA
Blog Entries: 1
Quote:
Originally Posted by littlemike View Post
Many hands make light work.
I'm so there
  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
How do you deal with "backside" bevel of driver cutouts? madisonears Multi-Way 6 30th August 2009 07:22 AM
12&quot; &quot;guitar&quot; driver in Audio Speakers jwhit67 Multi-Way 4 11th February 2008 03:47 PM
looking for a small 2" or 3" driver with poor bass response space-cake Full Range 3 27th December 2007 02:16 AM
FS: Silver Iris Coaxial 15" driver pair (sans XO and compression driver) theAnonymous1 Swap Meet 0 24th April 2007 01:09 AM


New To Site? Need Help?

All times are GMT. The time now is 03:23 AM.


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