Square horn rotation
- Thread starter Primoz Vozelj
- Start date
Re: Square horn rotation
Without testing the polar response, hard to say, but the horn looks like it could be about 60 x 60 nominally, and it looks like it is set in the correct direction for the way you have the cabinet in the photo.
The large vertical dimension is required to eliminate "pattern flip", a more narrow vertical dimension as is common will start to "go omni" at about the wavelength of the height.
Art
Primoz,
Without testing the polar response, hard to say, but the horn looks like it could be about 60 x 60 nominally, and it looks like it is set in the correct direction for the way you have the cabinet in the photo.
The large vertical dimension is required to eliminate "pattern flip", a more narrow vertical dimension as is common will start to "go omni" at about the wavelength of the height.
Art
Re: Square horn rotation
If you have a horn that is rated for 90* wide by 45* tall, then it needs to be TWICE AS TALL as it is wide, to have the same control in both planes.
A narrower horn has to be LARGER than a wider one to have the same effect.
VERY FEW products get this correct and it goes against the "common thought".
But it IS correct.
Most people are confused by horn patterns.
If you have a horn that is rated for 90* wide by 45* tall, then it needs to be TWICE AS TALL as it is wide, to have the same control in both planes.
A narrower horn has to be LARGER than a wider one to have the same effect.
VERY FEW products get this correct and it goes against the "common thought".
But it IS correct.
Re: Square horn rotation
Renkus was the first (again that I am aware of) that actually described it in their brochures.
I would argue that most horns on the market (probably more than 99%) are the wrong size. That is why so many people think they are right-because they don't understand how horn size matters.
And they also think that if a pattern is rated for "choose a number degrees", that it has that pattern across most of the bandwidth of the cabinet.
WRONG AGAIN. In many cases the horn only has that pattern on the top octave or 2. Most don't even do 3 octaves.
But as long as the consumer doesn't understand-they will continue to be made and people will still "believe" that they do what the specs say they do
EV was the first company to "get it right" (that I am aware of) in terms of avoiding pattern flip. Most people that I knew at the time assumed that EV did not know what they were doing-WRONG!
Renkus was the first (again that I am aware of) that actually described it in their brochures.
I would argue that most horns on the market (probably more than 99%) are the wrong size. That is why so many people think they are right-because they don't understand how horn size matters.
And they also think that if a pattern is rated for "choose a number degrees", that it has that pattern across most of the bandwidth of the cabinet.
WRONG AGAIN. In many cases the horn only has that pattern on the top octave or 2. Most don't even do 3 octaves.
But as long as the consumer doesn't understand-they will continue to be made and people will still "believe" that they do what the specs say they do
Re: Square horn rotation
The sad fact is that MOST horns are built completely WRONG dimension wise (I am not talking the type of flare here-just the basic exit dimension.
If you have a horn that is rated for 90wide x 45 tall then it "should" be TWICE as TALL as it is wide-in order for the pattern to avoid pattern flip-as Art said.
Pattern flip is something that most manufacturers do not pay any attention to-and therefore the industry has come to "accept" the completely WRONG performance.
Historically there have been a few that have been correct. The earliest ones that I remember were some EV products back in the 80s. And people used to comment on how weird they looked-even though they PERFORMED correctly.
I believe Renkus Heinz was the first to start pushing the idea and showing it in their literature.
And while I am at it-in most cases the idea of a "rotatable horn" is just funny and shows how gullible the average consumer is and how the manufacturer is simply willing to give them what they want-no matter how "wrong" it is.
Unless the horn is large enough, the only freq you are "rotating" are often in the top octave or two. Does that REALLY do what you "think" you want?
Since the narrower pattern needs to be the largest dimension-this means that it often has very little actual control over the freq of real interest.
But as long as people "think" they are getting something-and don't ever bother to check-manufacturers will continue to give it to them.
Just like a "mini line array"-but we won't go there---------------------
As Art said- you cannot just go by looks.
The sad fact is that MOST horns are built completely WRONG dimension wise (I am not talking the type of flare here-just the basic exit dimension.
If you have a horn that is rated for 90wide x 45 tall then it "should" be TWICE as TALL as it is wide-in order for the pattern to avoid pattern flip-as Art said.
Pattern flip is something that most manufacturers do not pay any attention to-and therefore the industry has come to "accept" the completely WRONG performance.
Historically there have been a few that have been correct. The earliest ones that I remember were some EV products back in the 80s. And people used to comment on how weird they looked-even though they PERFORMED correctly.
I believe Renkus Heinz was the first to start pushing the idea and showing it in their literature.
And while I am at it-in most cases the idea of a "rotatable horn" is just funny and shows how gullible the average consumer is and how the manufacturer is simply willing to give them what they want-no matter how "wrong" it is.
Unless the horn is large enough, the only freq you are "rotating" are often in the top octave or two. Does that REALLY do what you "think" you want?
Since the narrower pattern needs to be the largest dimension-this means that it often has very little actual control over the freq of real interest.
But as long as people "think" they are getting something-and don't ever bother to check-manufacturers will continue to give it to them.
Just like a "mini line array"-but we won't go there---------------------