Tang Band W3-881SI line array problems - Page 3 - diyAudio
Go Back   Home > Forums > Loudspeakers > Full Range

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 18th February 2013, 02:34 AM   #21
expert in tautology
diyAudio Member
 
bear's Avatar
 
Join Date: Apr 2002
Location: New York State USA
Ok, dopey idea.

Try it.

Turn the speakers upside down for a test. Run them that way.
See if that changes your impression of the mids or not.

Would be interested to know what you find.
__________________
_-_-bear
http://www.bearlabs.com -- Btw, I don't actually know anything, FYI -- [...2SJ74 Toshiba bogus asian parts - beware! ]
  Reply With Quote
Old 18th February 2013, 02:49 AM   #22
Speakerholic
diyAudio Moderator
 
Cal Weldon's Avatar
 
Join Date: Jan 2004
Location: Near Vancouver
Quote:
Originally Posted by Cal Weldon View Post
You won't need BSC but you will have to isolate the single driver from the rest but that won't be too hard.
Quote:
Originally Posted by bear View Post
Cal, the "one" driver has to be acoustically isolated too...
Is acoustically isolated the same as physically isolated?
__________________
Next stop: Margaritaville
Some of Cal's stuff | Cal Weldon Consulting
  Reply With Quote
Old 18th February 2013, 03:18 PM   #23
diyAudio Member
 
Join Date: Dec 2011
Location: MO
Great ideas here to "fix" the array. To isolate the 1 driver, you could maybe use pvc pipe to create the chamber for the dedicated midrange if the back of the cabinet is removable or add a "shelf" to isolate it (that would be assuming the usage of the top most driver as the midrange). A nice super tweeter up top would probably look great - I've personally always like the look of this one.
  Reply With Quote
Old 18th February 2013, 03:44 PM   #24
Speakerholic
diyAudio Moderator
 
Cal Weldon's Avatar
 
Join Date: Jan 2004
Location: Near Vancouver
Quote:
Originally Posted by Cal Weldon View Post
<snip> you will have to isolate the single driver from the rest but that won't be too hard. You may be able to do this with a simple 1st order XO <snip>
When I reread my post, I see why there was confusion from bear. I went from one topic right into the other without taking a breath.
__________________
Next stop: Margaritaville
Some of Cal's stuff | Cal Weldon Consulting
  Reply With Quote
Old 18th February 2013, 03:46 PM   #25
diyAudio Member
 
cogitech's Avatar
 
Join Date: Jan 2011
Location: Kamloops, BC
Quote:
Originally Posted by charliepuch View Post

Thats interesting that you say that the drivers would work best in a sealed box. When I modeled the response with WinISD it calculated an EBP of 148, which from my understanding is very much suited for a ported enclosure. The enclosure volume and port dimensions were all modeled using the T/S parameters of the drivers. Bass performance is not the problem that I am hearing with anyway. They have plenty of low range and kick. Its just the mids and highs that need work.
You'll see many people say that these drivers can't do bass. From what I have seen, those people are typically people who have a) not used the drivers, or b) only used them in small, sealed boxes (due to accepted wisdom, I guess).

Several of us around here, though, have put these drivers in larger, ported transmission lines, etc. and have been completely blown away by the amount of bass they can produce. What I have learned is that you need to take everything with a grain of salt, regardless the accepted wisdom.

I have no doubt that your array has plenty of bass, because I am only running a single driver in each of my towers and the bass is deep and rich. Not capable of ear-bleeding SPL, but that wasn't a design goal.

Cure that comb filtering issue and you will have a kick-*** set of speakers.
  Reply With Quote
Old 18th February 2013, 06:18 PM   #26
adason is offline adason  United States
diyAudio Member
 
adason's Avatar
 
Join Date: Nov 2004
Location: Maryland
you can rescue this project by putting a tweeter on top of the array...


well, I have not read whole thread and not seen all the picture, so if the array is so tall, attach the tweeter on the side in apropriate height ( I have done it to my straight line array a while ago, it improved things a lot)

Last edited by adason; 18th February 2013 at 06:21 PM.
  Reply With Quote
Old 18th February 2013, 06:30 PM   #27
expert in tautology
diyAudio Member
 
bear's Avatar
 
Join Date: Apr 2002
Location: New York State USA
ummm... the bass' relative level remains the same regardless of the number of drivers used, save for mutual coupling effects, for the same type of enclosure and the same alignment.

I have heard MJK's own TQWT, and it did produce nice bass from a Fostex (iirc) driver, a 5 1/4" (probably?). But this is a ported design, not a TQWT. It's not the same thing.

In case it wasn't clear, turning the OP's cabinets upside for a test causes the floor bounce issue to more or less go away...

I'm thinking he's hearing a LOT of null due to floor bounce in the lower mids, upper bass...

_-_-
__________________
_-_-bear
http://www.bearlabs.com -- Btw, I don't actually know anything, FYI -- [...2SJ74 Toshiba bogus asian parts - beware! ]
  Reply With Quote
Old 21st February 2013, 12:10 AM   #28
expert in tautology
diyAudio Member
 
bear's Avatar
 
Join Date: Apr 2002
Location: New York State USA
Gee, I was really hoping he would try flipping them upside down for a test... oh well...
__________________
_-_-bear
http://www.bearlabs.com -- Btw, I don't actually know anything, FYI -- [...2SJ74 Toshiba bogus asian parts - beware! ]
  Reply With Quote
Old 21st February 2013, 04:57 AM   #29
diyAudio Member
 
Join Date: Oct 2005
since the money is spent, the drivers are there, I recommend to make ONE big array reusing all the drivers, and with the drivers touching each other. Don't bother finishing the enclosure, just make it a raw experiment. With the sound originating from a much higher line source the effect of standing up will be far less. And with the drivers touching there will be less combing.
If this has a good result (and it is well possible), then you can see whether you want to buy another set of drivers to make a pair.

I am not convinced that adding a tweeter is the best approach. The dispersion characteristic will be very different from the cilindrical dispersion of the array.
  Reply With Quote
Old 21st February 2013, 11:08 AM   #30
diyAudio Member
 
Scottmoose's Avatar
 
Join Date: Mar 2005
Location: UK
+1 for building a longer array. I'd anticipate it would work considerably better, although some Eq will probably still be required to balance the top end SPLs. The slightly rising response on the 881 might help a little with this. Either that, or rebuild the current boxes with the drivers touching to minimise the interference, again add some Eq if desired for the top end, & accept that they're not ideal speakers for listening to music while wombling around the room.

Last edited by Scottmoose; 21st February 2013 at 11:10 AM.
  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
"nanoTower" - Tang Band W3-881SI cogitech Full Range 142 8th September 2014 10:20 PM
Tang Band W3-881SI Line Array Help kctess5 Full Range 16 8th December 2011 10:25 PM
Tang Band W3-593SF vs. Tang Band W3-926SD Zaputh Full Range 17 5th June 2009 11:37 PM
Tang band line array? saabracer23 Multi-Way 3 14th May 2006 07:22 AM
Tang Band line array Timn8ter Multi-Way 5 2nd October 2003 09:43 PM


New To Site? Need Help?

All times are GMT. The time now is 11:22 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