Wisdom Audio's new woofers - diyAudio
Go Back   Home > Forums > Loudspeakers > Planars & Exotics

Planars & Exotics ESL's, planars, and alternative technologies

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 13th January 2005, 02:37 AM   #1
diyAudio Member
 
Join Date: Jun 2004
Location: Orlando, FLA
Default Wisdom Audio's new woofers

Has anyone else seen Mr. Bohlender's new woofer for his in-wall speakers? He showed me a sample at the CES convention and I was highly impressed. It is about 4" wide and 18" long with a big flat diaphragm. The voice coil is nearly the same size as the diaphragm so it gets driven over its whole surface. Kind of like a track field shape. I believe the magnets are neo and the frame is super chunky, like a boat anchor plus a big Xmax. He says it has a pretty high Q so I started to salivate at the possiblity of some dipoles with these..... Maybe it will work really well and someone will do a similar version for us all to enjoy.

Greg
  Reply With Quote
Old 16th January 2005, 09:02 PM   #2
diyAudio Member
 
Join Date: Jan 2004
Location: Toronto, ON, Canada
Quote:
The voice coil is nearly the same size as the diaphragm so it gets driven over its whole surface
How do you figure?
  Reply With Quote
Old 16th January 2005, 11:41 PM   #3
diyAudio Member
 
Join Date: Jun 2004
Location: Orlando, FLA
How do I figure?

Well, as oppossed to say a 6*9 driver that has a 1" vioce coil, I would say that a driver that has a coil that is nearly 2" by 12" qualifies, wouldn't you? This is the set-up that Wisdom is using for its new inwall woofers.

Greg
  Reply With Quote
Old 17th January 2005, 12:00 AM   #4
diyAudio Member
 
Join Date: Jan 2004
Location: Toronto, ON, Canada
I find it hard to qualify the statement that a diaphragm is driven over its whole surface when that diaphragm is moved by ANY kind of voice coil. Are you trying to say that a larger voice coil couples better than a small one? Fine, I can accept that. But saying that a voice coil that does NOT directly apply a force over the entire diaphragm DOES, slightly irks me.
  Reply With Quote
Old 17th January 2005, 12:08 AM   #5
diyAudio Member
 
Join Date: Jun 2004
Location: Orlando, FLA
OK, fine, I see your point....it's NOT the ENTIRE suface, but come on. You KNEW what I meant right? I mean, if i mention a voice coil at all, we know that it is driven only at the point where it attaches to the cone, so why the big deal? Sorry I didn't say, "driven over a large percentage of it surface"

greg
  Reply With Quote
Old 20th January 2005, 05:51 PM   #6
diyAudio Member
 
Join Date: Jan 2004
Location: Toronto, ON, Canada
And that isn't quite precise, either. If the voice coil is nearly the same size as the diaphragm, then it's kind of like a huge dome, and the middle will be prone to resonance (I think).
  Reply With Quote
Old 20th January 2005, 06:17 PM   #7
diyAudio Moderator
 
pinkmouse's Avatar
 
Join Date: Apr 2002
Location: Chatham, England
Guys, play nicely please...
__________________
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?
  Reply With Quote
Old 25th January 2005, 10:45 PM   #8
expert in tautology
diyAudio Member
 
bear's Avatar
 
Join Date: Apr 2002
Location: New York State USA
Quote:
Originally posted by 454Casull
And that isn't quite precise, either. If the voice coil is nearly the same size as the diaphragm, then it's kind of like a huge dome, and the middle will be prone to resonance (I think).

a quick look at it shows that a cone nominally supported/driven at one central point will be extremely prone to resonances...

a stiff flat surface driven along the periphery will have a far better chance of not having as many break up resonances...

at least that's imho...

_-_-bear
__________________
_-_-bear
http://www.bearlabs.com -- Btw, I don't actually know anything, FYI -- [...2SJ74 Toshiba bogus asian parts - beware! ]
  Reply With Quote
Old 25th January 2005, 10:49 PM   #9
usekgb is offline usekgb  United States
diyAudio Member
 
usekgb's Avatar
 
Join Date: Feb 2003
Location: Salt Lake City, UT, USA
Enough bickering. Tell us more about the driver. Any pictures or specs?

Cheers,
Zach
__________________
Ahhhhhhhhh...............That's what that button does.
  Reply With Quote
Old 25th January 2005, 11:05 PM   #10
diyAudio Moderator
 
pinkmouse's Avatar
 
Join Date: Apr 2002
Location: Chatham, England
Yeah, pics or links would be good.
__________________
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?
  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
Audio Wisdom: Debunking common myths DCPreamp Everything Else 235 19th February 2007 02:29 AM
audio pro b2-40 woofers??? soulsheiksan Subwoofers 3 4th October 2005 02:47 PM


New To Site? Need Help?

All times are GMT. The time now is 10:32 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