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 17th April 2010, 04:04 PM   #1
Donovad is offline Donovad  United States
diyAudio Member
 
Join Date: Jun 2007
Default Any design suggestions for Aurasound NS10-513-4A ?

I'm in the process of finishing a quad of 36hz TH for the 6.5" tang band drivers and am now trying to come up with an interesting design for a pair of Aurasound NS10-513 4 ohm drivers that I have laying around. Looking for something fun and different , trying to stay away from the typical ported enclosure. I've modeled them in a 4th order BP and want to see what else they might work in. Any suggestions ?

Thanks all, Daniel.
  Reply With Quote
Old 17th April 2010, 09:14 PM   #2
bjorno is offline bjorno  Sweden
diyAudio Member
 
Join Date: Mar 2005
Location: Jacobsmountain
Send a message via MSN to bjorno
Quote:
Originally Posted by Donovad View Post
Any suggestions ?
Hi Daniel,

Here’s a suggestion if folded more than once would be very compact and at sane SPL would challenge your TH: s SQ-wise and have a constant ‘sound’ impression for all power levels the speaker can handle.

Aluminium cone drivers are known for to have best piston behaviour at low frequencies (below 1kHz), and a low storage of delayed energy especially if of a high Qm type (IME) and if resembles a high quality built driver, like the Aurasound NS10-513-4A.

Its a good choice when using the driver in a small mouth T-TQWT provided you do not deviate from the section lengths and CSA: s given in the simulation I’ve submitted.

You must make allowances for the driver occupied volumes, both in front of the driver as well for the larger rear side volume too.

Don’t worry about the small mouth or the high compression; (4.44:1), the sub will not sound at all like a common reflex-box equipped with a 4-inch port tube.

The port resonances, if any exists, is dependent of the air mass confined in the port area times the thickness of the wood (3/4”?), or of a very short section length = L34 + the end correction for both sides.

The resonances would stay well above 1 kHz and the mouth air velocity ratio would be below Mach 0.03 at max input power.

I prefer to close the ordinary S4 area by moving the mouth (made circular or extruded circular max 3:1 with the cut-out edges chamfered and sanded smoothly for lowest turbulence) centred with the front of the driver.

A couple of Hz at the FR low end may be lost but is easily gained back again when the speaker is moved more towards a room corner.

b
Attached Images
File Type: gif NS10-513-4A_T-TQWT.GIF (174.1 KB, 128 views)
  Reply With Quote
Old 17th April 2010, 10:20 PM   #3
Donovad is offline Donovad  United States
diyAudio Member
 
Join Date: Jun 2007
Default Help

Bjorno, thanks for running the sim. Assuming I can get it simplified to box dimensions i can make sense of it may be a good option. My Hornsrep kung-fu is weak and I'm struggling to match your simulation. Im gonna work with it some more and see if i can figure it all out. Is there a picture of an example somewhere that might help me visualize what a finished TQWT will look like ?

Regards, Daniel.
  Reply With Quote
Old 18th April 2010, 01:19 AM   #4
bjorno is offline bjorno  Sweden
diyAudio Member
 
Join Date: Mar 2005
Location: Jacobsmountain
Send a message via MSN to bjorno
Quote:
Originally Posted by Donovad View Post
..what a finished TQWT will look like ?..
Hi Daniel

Read this:

Building a nice Subwoofer - questions.

and see some pictures to get ideas from:

b
Attached Images
File Type: jpg T-TQWT_ex.JPG (141.5 KB, 118 views)
File Type: jpg R-T-TQWT.JPG (93.6 KB, 115 views)
  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
My Take on Threshold NS10 Russ White Pass Labs 583 23rd May 2012 05:05 AM
Aurasound NTL25-354-4A Silk Line Source Tweeters omarmipi Swap Meet 1 12th March 2009 04:58 PM
Irf 513 Circuits east electronics Solid State 1 8th September 2008 07:20 PM
Threshold NS10 ponger Pass Labs 4 12th November 2005 11:29 AM


New To Site? Need Help?

All times are GMT. The time now is 02:02 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