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  »  New  Problems with horns: mid-range horns...  First or second order for 1" driver....  Horn-Loaded Speakers Forum     8  62859  07-21-2004
  »  New  How to paint Multicell horns?..  Hm, it works but I am not thrilled....  Horn-Loaded Speakers Forum     4  22512  12-09-2010
  »  New  Adding one more non-spherical to Macondo...  Horn suggestions for 300Hz-1000Hz channel...  Horn-Loaded Speakers Forum     23  132220  12-15-2010
  »  New  Romy's Multi-cell Horns Where Are They?..  Love The Look...  Horn-Loaded Speakers Forum     2  9824  08-17-2013
04-22-2005 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,366
Joined on 05-28-2004

Post #: 1
Post ID: 938
Reply to: 938
The Multicells HF Horns.

I know that tweeters is a “lost subject” and it is hard to talk about tweeters with audio people. Everyone understand tweeters differently, primary in context of this systems or even more correctly – in context of this frustrations with thier current tweeters. I’m not an exception from those rules. I tend to use “talented” midranges and I do not anticipate tweeter to ”do” a lot. It is know that I have a bias to vintage tweeters with plastic diaphragms but here is not a conversation about the tweeters but rather about the tweeter waveguide.

I wrote before in the article “Problems with horns: tweeters” that I like wide dissipation tweeters, and considering that I use them way above 10kHz I would love to have a dissipation pattern as large as possible, 180 degree is better then 120 degree. Despite that I do have a tweeters about which I feel very comfortable but there is one tweeter direction where I would look with qureacity.

I heard a few times large 18 sections multicell midranges and it is not that I liked them but it was kind of fascinating effect, and particularly in far-filed. Altec has a number of 1803 sand-filed versions and I know Vitavox and RCA did the similar. They were huge, heavy…. and sort of mid-rangy… but I wonder what would be if to apply the same concept to a tweeter?

multicell.jpg

I can see a 1:10 scale model of the 1803B, perhaps no more then 8-10” of total width having 7-8 sells per each of 3-4 rows. It might be a hall of the job to maintain the correct profiles of the sells within this size built if someone would do I would defiantly go for it and would try what happen. Did anyone have seen of heard any attempts in this direction?

Rgs,
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
04-22-2005 Post does not mapped to Knowledge Tree
cv
Derby, United Kingdom
Posts 173
Joined on 09-15-2004

Post #: 2
Post ID: 939
Reply to: 938
Re: The Multicells HF Horns.
Romy, have you not seen the Duevel horns? 360 dispersion.
Not sure I spelled that correctly; I might be thinking of the beer...

It's easier than 48 or 64 tweeters arranged multicells fashion:-O

cheers

PS
04-22-2005 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,366
Joined on 05-28-2004

Post #: 3
Post ID: 940
Reply to: 939
Duevel horns?
Sure, I heard, they always sound quite awful and they are an illustration of a wishful but wrong thinking. First of all their tweeter are curved (!!!) into…. something that could be only theoretically called a horn. What was in the mind of a designer who decided to put a 90-degree curve into the tweeter wave path I have no idea! 


Image courtesy to Ted Lindblad

Second of all I am not interested in 360-degree radiation and I feel it would be a mistake to go there. I would go for 180-degree or perhaps 200-degree max.

Rgs,
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
06-30-2005 Post does not mapped to Knowledge Tree
ayebee
Posts 13
Joined on 06-03-2005

Post #: 4
Post ID: 1117
Reply to: 938
Altec 3000H
Hi!

You are probably familiar with this one... It's the closest to a multi-cell tweeter (well, maybe because it actually IS a multi-cell tweeter, but only 6 cells) I've ever seen...

picture of Altec 3000h

Regards,
Anders Boman
06-30-2005 Post does not mapped to Knowledge Tree
slowmotion


Oslo, Norway
Posts 60
Joined on 07-22-2004

Post #: 5
Post ID: 1118
Reply to: 938
Re: The Multicells HF Horns.
Hi

Pioneer did something with multicell tweeter horn.
I have a picture, but don't know how to upload it .

cheers ,
Jan
06-30-2005 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 9,366
Joined on 05-28-2004

Post #: 6
Post ID: 1121
Reply to: 1118
How to upload pictures.
 slowmotion wrote:
Pioneer did something with multicell tweeter horn. I have a picture, but don't know how to upload it .
http://www.goodsoundclub.com/TreeItem.aspx?PostID=1120#1120

Meow?


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
07-01-2005 Post does not mapped to Knowledge Tree
slowmotion


Oslo, Norway
Posts 60
Joined on 07-22-2004

Post #: 7
Post ID: 1122
Reply to: 1121
Re: How to upload pictures.
Hmmm, your forum is not kind to other browsers than Windoze Exploder, Romy
07-01-2005 Post does not mapped to Knowledge Tree
slowmotion


Oslo, Norway
Posts 60
Joined on 07-22-2004

Post #: 8
Post ID: 1123
Reply to: 1121
Re: How to upload pictures.
Anyway, here's the picture, both horns are Pioneer. __hr_HPIM0036.jpg cheers, Jan
08-19-2007 Post does not mapped to Knowledge Tree
mats
Chicago
Posts 75
Joined on 09-18-2005

Post #: 9
Post ID: 5067
Reply to: 1123
Basswood Multicells
Here is a link to chaudio's basswood Altec 1505B replica's:

http://chaudioroom.com/

and on ebay:

http://cgi.ebay.com/ALTEC-1505B-WOOD-REPLICA-1505-MULTICELLULAR-HORN-288_W0QQitemZ290151433260QQihZ019QQcategoryZ73372QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
12-11-2007 Post does not mapped to Knowledge Tree
be.audiophil


Munich
Posts 1
Joined on 12-12-2007

Post #: 10
Post ID: 6103
Reply to: 5067
Construction plans of Altec 1505
HI, Dietmar from Germany uses a diy multicellular horn for his JBL 077-tweeter http://chaudioroom.com/Photos/CH1505%20Dietmar-6m.jpg By the way, i´m searching construction plans of Altec 1505, 805 or 1005 for a complete DIY project. Any suggestions? Many thanks in advance


Regards

Rolf aka be.audiophil
Page 1 of 1 (10 items) Select Pages: 
   Target    Threads for related reading   Most recent post in related threads   Forum  Replies   Views   Started 
  »  New  Problems with horns: mid-range horns...  First or second order for 1" driver....  Horn-Loaded Speakers Forum     8  62859  07-21-2004
  »  New  How to paint Multicell horns?..  Hm, it works but I am not thrilled....  Horn-Loaded Speakers Forum     4  22512  12-09-2010
  »  New  Adding one more non-spherical to Macondo...  Horn suggestions for 300Hz-1000Hz channel...  Horn-Loaded Speakers Forum     23  132220  12-15-2010
  »  New  Romy's Multi-cell Horns Where Are They?..  Love The Look...  Horn-Loaded Speakers Forum     2  9824  08-17-2013
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