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Posted on: 8-16-09

JLH

Indianapolis, IN U.S.A.
Posts: 42



Thread: The absolutely “best” material for horns construction.
           Reply: Just a variation of the unity horn  
fiogf49gjkf0d
 decoud wrote:


One of the problems with horns is the inflexibility of frequency cut-off: you are limited to a discrete number equal to the number of horns you have. This makes experimentation difficult without having an absurdly large array of different horn sizes to try. So how about the following configuration:

VARIABLE_PROFILE_HORN.jpg

The entire loudspeaker is a single profile that changes continuously in cross section from floor to ceiling with high frequencies being in the centre and low at the extremes. Any cut-off frequency is therefore always available (in two positions): it is simply a matter of driver positioning. Equally, the only limit on the number of "horns" is the number of drivers. Removable horizontal septations can be introduced if necessary but it would be nice to do without them.

Once the optimal profile is determined the thing would be trivial to build: it could be just a series of CNC'd slabs of mdf stacked on top of each other.

Rgds, d


What you have there is Tom Danley's Unity Summation device in principle. Tom has a predictable method that limits the trial and error approach. It would be very difficult to get the frequency response flat for your example. The distance between the drivers is too great and will result in a lot of phase and timing problems.

 Posted Date All replies in the thread
  2-23-08   The absolutely “best” material for horns construction.   (2-23-08)..Romy the Cat
  2-24-08   Not new   (2-24-08)..el`Ol
  2-24-08   A well researched material   (2-24-08)..Paul S
  2-24-08   Sandcast horns   (2-24-08)..mark
  2-24-08   What about light metals?   (2-24-08)..Antonio J.
  2-24-08   Very liberating…. It is the way how it should be.   (2-24-08)..Romy the Cat
  3-7-08   Pottery horns   (3-7-08)..decoud
  3-8-08   Back to the stone age   (3-8-08)..el`Ol
  4-10-08   Horn material   (4-10-08)..loach71
  6-23-09   Re: sand horns   (6-23-09)..teodor_gugulanov
  6-26-09   Not that easy   (6-26-09)..JLH
  6-26-09   Ain't no shortcut   (6-26-09)..jessie.dazzle
  6-27-09   Very surprising comment.   (6-27-09)..Romy the Cat
  6-27-09   Modular horns   (6-27-09)..decoud
  6-27-09   One piece at a time   (6-27-09)..jessie.dazzle
  6-27-09   Scalability   (6-27-09)..decoud
  6-27-09   Molds are not scalable for different flare rates.   (6-27-09)..JLH
  6-28-09   If it where up to me…   (6-28-09)..Romy the Cat
  6-28-09   Something like this?   (6-28-09)..Dominik
  7-1-09   Coiled horn   (7-1-09)..decoud
  8-2-09   Discussion on diyaudio   (8-2-09)..el`Ol
  8-7-09   The double-layering horn speakers.   (8-7-09)..Romy the Cat
  8-16-09   Variable profile horn system   (8-16-09)..decoud
  8-16-09   Just a variation of the unity horn   (8-16-09)..JLH
  8-16-09   Not summation but continuity   (8-16-09)..decoud
  8-16-09   It will not work   (8-16-09)..JLH
  8-17-09   PDF link to Unity horn patent   (8-17-09)..JLH
  8-18-09   Unity horn design   (8-18-09)..decoud
  8-19-09   Low power SET is not a problem.   (8-19-09)..JLH
  8-19-09   The Synergy design… and antiskating   (8-19-09)..Romy the Cat
  8-19-09   I'm not trying to promote the Synergy   (8-19-09)..JLH
  8-19-09   50 degrees of separation…   (8-19-09)..Romy the Cat
  8-19-09   Not as bad as you think   (8-19-09)..JLH
  12-14-09   The Synergy patent link is broken   (12-14-09)..JLH
  5-9-18   Two products.   (5-9-18)..xandcg
  5-14-18   Sure a great material, so what?   (5-14-18)..Romy the Cat
  5-14-18   Finishing.   (5-14-18)..xandcg
  9-13-19   Steel/Aluminum or polymer concrete?   (9-13-19)..xandcg
  9-24-19   Aluminum thermal expansion.   (9-24-19)..xandcg

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