| Search | Login/Register
   Home » Horn-Loaded Speakers» Wide dispersion horns (4 posts, 1 page)
  Print Thread | 1st Post |  
Page 1 of 1 (4 items) Select Pages: 
   Target    Threads for related reading   Most recent post in related threads   Forum  Replies   Views   Started 
  »  New  Some horn writing by Thomas Dunker. ..  Some horn writing by Thomas Dunker. ...  Horn-Loaded Speakers Forum     0  41102  01-14-2006
  »  New  A new beast from JBL: Everest DD66000..  The JBL Sound: 4435 – 4355 – Everests…...  Horn-Loaded Speakers Forum     4  56043  03-15-2007
  »  New  Horn speaker with dipole bass?..  I kind of agree on dipole bass...  Horn-Loaded Speakers Forum     11  78653  03-07-2010
06-09-2007 Post does not mapped to Knowledge Tree
coops
London, United Kingdom
Posts 115
Joined on 02-16-2007

Post #: 1
Post ID: 4577
Reply to: 4577
Wide dispersion horns
I wanted to ask your opinion on wide dispersion horns, I am thinking particularly of the ( maple Wink horns used in the TAD Exclusives ,early Westlakes etc, mostly studio monitor designs. I can see why a compact ,wide dispersion horn would be attractive for monitoring, have you had any experiences with them, the design is continued,but highly sytlized in the latest 6600 Everest which I heard briefly recently ,obviously horn depth and the angles are very different to a 'straight' horn , thanks Keith.
06-10-2007 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,495
Joined on 05-28-2004

Post #: 2
Post ID: 4586
Reply to: 4577
I see no needs for them in home installations

There were plenty it of them made: Techniques 9500, Excusive 2301, Iwatas, JBL 2350 and JBL 2345, Vitavox (narrow) and few others … They kind of very strange horns and I always was suspicions about them. Though my suspicions are purely theoretical: as I had only once JBL 2345 in my room - in the end of 2000 - and I did not spend a lot of efforts or brains to work with them. I heard of course them in a few installations of other people.  But I hard to say anything in context of other installations as whatever I head in those installation had many other problems and the “wide dispersion horns” was be the least of the problem. So, my suspicion feeling about “wide dispersion horns” are purely imaginary and is based upon decisions of mind instead of the applied experience.

I have to preface with a comment, that any horns of none-counterparty horns profiles suck, bit time. The LF horn under some conditions might be hyperbolic, conical or exponential but MF horns must be terminated contemporary, means perpendicular (Tratrix or Le Cleach profile). The “wide dispersion horns” are never the horn of the “right” profile. They have very strange and different profile as each different point. Horizontally they are in fact not horn-loaded at all but rather direct radiators (imaging-wise). In convention spherical horn, we know that any given frequency range has own optimum size of the torn. We also know, using for instance a contemporary spherical Tratrix and can predicts what will get at 10 degree off or 30 degree or, in horizontal of vertical plane. With “wide dispersion horns” it is way much complex and hardly predictable.

In a case of a two way installation with bass corner-loaded and a “wide dispersion horn” sits atop of bass and fires from a far distance 90 degree everything is OK and in fact in this scenario the “wide dispersion horns” do quite fine. However, as soon we go for nearfiled and multiple horns then everything become complex imaging wise-and integration-wise. Probably if to pile up 3-4 “wide dispersion horns” vertically and to spend some time to play with them, learning what kind crossovers and what kid integration techniques they would like) then it might be possible to make it work. I never went there and I never heard any playback that tool the idea far and at serious level. I have seen that that French guy - Jean-Yves Kerbrat - used to have a mid-room array of the “semi-wide dispersion horns” - it would be interesting to hear how it works but I never visited him.

In other words I do not know. Any topology if taken seriously and might be pushed and stressed up to the point where I might serve more or less acceptable unlit it tits the limitation of topology. I personally never look in the “wide dispersion horns” because I do not see any advantages in the effect of the dispersion. Those horns have ultra wide horizontal opening and in order to keep the driver “see” the loading volume they vertically squished. I always ask myself why would be necessary? If pro applications where they have a channel sitting on stage, firing in front and 100 Jewish dentists dance around the speaker the wide dispersion is good. How necessary it is in context of home installations? I do not see any rational. I might come up with many hypothetical disadvantages. What would be interesting if some one who has successfully implemented the “wide dispersion horns” would voice the advantages of the “wide dispersion horns”.

Rgs, Romy the Cat


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
06-11-2007 Post does not mapped to Knowledge Tree
coops
London, United Kingdom
Posts 115
Joined on 02-16-2007

Post #: 3
Post ID: 4588
Reply to: 4586
wide dispersion horns
Romy thanks very much for taking the time to reply,  presumably the design originates form PA design, literally enabling as many people as possible to hear the announcement, looking at the 'Everest' in Munich, the mid range 'horn' appears to be no more than two stylized 'lips'  seemingly  purely for aesthetic reasons, there appears to be no 'horn' at all and the driver just radiated directly, the h/f is encased in a plastic surround . Surely not having horn loading will affect the output  of the mid driver? keith.
06-11-2007 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,495
Joined on 05-28-2004

Post #: 4
Post ID: 4589
Reply to: 4588
Everest is not a horn loudspeaker but a product.

Well, I do not know what they did in “Everest”. The level of being “horny” is not a fixed level. JBL might do own drivers that does not need or need less equalization from hors. It’s hard to say anything without having the driver in own hands. Sure the Everest’s MF drive is loaded somewhere but how low? It might “feels” that it is being loaded down to 1000Hz and whatever happens lower it press air by exertion… who knows? Purely visually I would like the upper and lover lips of that horn to be fatter, have more body inside of the horn’s bell and end up parallel to front baffle, however it will force a tweeter to be an 10-12 taller – I sure the shipping department would not like it…

BTW, if you heard Everest then post your feeling about this speaker in the Everest’s thread.

http://www.goodsoundclub.com/Forums/ShowPost.aspx?postID=4015#4015

I read the feedback about Everest at audio Heritage web site but unfortunate those people kind of dead and they plummet into listening ecstasy each time then they hear a dog furring if the dog has JBL label on it’s leash …

The caT


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
Page 1 of 1 (4 items) Select Pages: 
   Target    Threads for related reading   Most recent post in related threads   Forum  Replies   Views   Started 
  »  New  Some horn writing by Thomas Dunker. ..  Some horn writing by Thomas Dunker. ...  Horn-Loaded Speakers Forum     0  41102  01-14-2006
  »  New  A new beast from JBL: Everest DD66000..  The JBL Sound: 4435 – 4355 – Everests…...  Horn-Loaded Speakers Forum     4  56043  03-15-2007
  »  New  Horn speaker with dipole bass?..  I kind of agree on dipole bass...  Horn-Loaded Speakers Forum     11  78653  03-07-2010
Home Page  |  Last 24Hours  | Search  |  SiteMap  | Questions or Problems | Copyright Note
The content of all messages within the Forums Copyright © by authors of the posts