TH-18 Flat to 35hz! (Xoc1's design) - Page 164 - 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 25th March 2014, 09:39 PM   #1631
diyAudio Member
 
Join Date: Apr 2010
MMS makes sense. I was confused by the MMD comment. The 2400 has a MMS of about 190. So

18 Sound LW2400 Mms 192
18 Sound NLW9601 Mms 270
18 Sound NLW9000 Mms 218
BC TBX100 Mms 209
BC TBW100 Mms 245
BC SW115 Mms 275

Seems like the 2400 is the weakest cone. Although it has the least excursion but not by much less than the 100. 115, 9000 and 9601 have the same excursion capabilities though. Considering all these are safe in the TH18 are we just saying the 270g class can just take more punishment compared to a woofer that has the same abilities but lighter cone?
  Reply With Quote
Old 25th March 2014, 09:54 PM   #1632
NEO Dan is offline NEO Dan  United States
diyAudio Member
 
NEO Dan's Avatar
 
Join Date: Jun 2008
Location: N.E. Ohio
Hi,
I've fallen behind the flu


Be on the lookout for other contributing factors like coil material and dia/length...
__________________
Regards,
Dan
  Reply With Quote
Old 26th March 2014, 06:50 PM   #1633
Djim is offline Djim  Netherlands
diyAudio Member
 
Join Date: Dec 2009
Location: 'Ollanda
Quote:
Originally Posted by Andy1967 View Post
So the final cone correction for your 18SW100 was as you kindly shared in post 1144?
Hi Andy1967,

This one is cone correction + an increase of the compression ratio similar (but optimised this time and no longer uses round disks but sheet strips) to what I recommended for CRESCENDO's 18SW100.


Click the image to open in full size.

Last edited by Djim; 26th March 2014 at 06:52 PM.
  Reply With Quote
Old 26th March 2014, 09:49 PM   #1634
epa is offline epa  Netherlands
diyAudio Member
 
Join Date: Apr 2010
Location: amsterdam
Quote:
Originally Posted by chrapladm View Post
What determines a weak cone?

I will be using the 18 Sound LW2400 in mine.

fyi
the 18sound 18lw2400 are used a few times in the xoc1 cab,with good results.
dont know wich post's .there was even a youtube clip somewhere here.
recently had a few in my hands and they are resonably strong cones.
__________________
one good thing about music ,when it hit you feel no pain.
so hit me with music
.
  Reply With Quote
Old 26th March 2014, 10:32 PM   #1635
diyAudio Member
 
Join Date: Apr 2010
Quote:
Originally Posted by Djim View Post
Hi Andy1967,

This one is cone correction + an increase of the compression ratio similar (but optimised this time and no longer uses round disks but sheet strips) to what I recommended for CRESCENDO's 18SW100.


Click the image to open in full size.
Wow huge help. Thanks
Quote:
Originally Posted by epa View Post
fyi
the 18sound 18lw2400 are used a few times in the xoc1 cab,with good results.
dont know wich post's .there was even a youtube clip somewhere here.
recently had a few in my hands and they are resonably strong cones.
Thanks for this also. I know they have been used and wasnt really stressing using it. I am trying to decide if I want to spend the extra money for the 9000 right now anyways. Although I am thinking I will stick with the 2400.
  Reply With Quote
Old 27th March 2014, 06:58 AM   #1636
diyAudio Member
 
Join Date: Dec 2011
Quote:
Quote:
Originally Posted by Andy1967
So the final cone correction for your 18SW100 was as you kindly shared in post 1144?
Hi Andy1967,

This one is cone correction + an increase of the compression ratio similar (but optimised this time and no longer uses round disks but sheet strips) to what I recommended for CRESCENDO's 18SW100.
Hi Djim,
Thanks a lot for your suggestion for cone correction in Post 1633.
I was hoping for something like this, that seems to work both as part of the throat(?), and also aims for the right compression.

The nice thing about CRESCENDOs solution is that he has documentation that he has more output with his correction. Your correction might even add something on top of that, like cone control?

I am still aiming to do some type of excursion testing when i get my SPL meter and when it gets a bit warmer outside here in Denmark

Thanks again
/ Andy
  Reply With Quote
Old 27th March 2014, 08:53 PM   #1637
Djim is offline Djim  Netherlands
diyAudio Member
 
Join Date: Dec 2009
Location: 'Ollanda
Quote:
Originally Posted by Andy1967 View Post
and also aims for the right compression.
....and when it gets a bit warmer outside here in Denmark
Hi Andy 1967,
YW

What is "the right compression"?

That kind of weather will arrive soon...

Last edited by Djim; 27th March 2014 at 08:55 PM.
  Reply With Quote
Old 27th March 2014, 10:02 PM   #1638
diyAudio Member
 
Join Date: Dec 2011
Quote:
Originally Posted by Djim View Post
Hi Andy 1967,
YW

What is "the right compression"?

That kind of weather will arrive soon...
Hi Djim,
Good question, but I am hoping that the right compression will have impact on the output and cone control. Except from bracing the mouth I recon this type of adjustment is all we are left with when the cab is glued

We are still below zero Celsius at night and short of a SPL meter
  Reply With Quote
Old 19th May 2014, 02:08 AM   #1639
diyAudio Member
 
Join Date: Jan 2011
Finally got a chance to drag these out. But only listened at very very low levels due to neighbors.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.
  Reply With Quote
Old 19th May 2014, 02:09 AM   #1640
diyAudio Member
 
Join Date: Jan 2011
And I didn't have time to play around with the measurement mic, dark clouds started moving in shortly after so I was worried about rain (yet it never rained grrr)
  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
18 inch labhorn design. mulletdude Subwoofers 23 27th November 2013 08:43 PM
Ciare 18 bass horn design soundhead Subwoofers 5 22nd September 2013 08:33 AM
2 18 bass design simpleacoustic Subwoofers 101 15th May 2011 09:22 AM
I want my Avalanche 18 to go flat to 15hz thadman Subwoofers 10 11th November 2006 02:54 AM
Looking for suggestions on a 1300W Dual 18 sub design. mjcohen Subwoofers 5 21st December 2004 07:38 AM


New To Site? Need Help?

All times are GMT. The time now is 10:39 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