How would the sound dispersion be affected by changes in the width/height relationship of the mid-horn? I was thinking about going more square while keeping the area constant from throat to flair. I've seen klipsche use square horns, but most seem to be rectangular. Obviously the system was designed to have a rectangular horn for a reason, but I'd like to know how changes in the aspect ratio wil affect the sound. I'm thinking about building them that way to fit the overall design I have in mind.
Wayne Parham Messages: 18728 Registered: January 2001
Illuminati (33rd Degree)
The flare angle of a conical horn basically sets the pattern. At low frequencies, the horn becomes too small to control the pattern, but above that, it's set by the wall angle.
Wayne Parham Messages: 18728 Registered: January 2001
Illuminati (33rd Degree)
The mouth area sets the lowest frequency where pattern control is maintained. A horn that is larger in one dimension than the other loses pattern control on the smaller axis sooner than the larger one. If the mouth area is large enough, pattern control can be maintained throughout the passband of the device. But that takes a very large mouth, and is usually one of the tradeoffs in horn design.
Ok, so keeping the flare angle and final area teh same as the original design (this is for the mid-horn on the pi-7, btw) is important, but I may loose some pattern control with the narrower horizontal dimension. Is that correct? Hmmm...its all about compromises, isn't it? There is no free ride.
So if I've got this right, I would probably loose some stereo imaging with a square horn rather than a rectangular horn.
Wayne Parham Messages: 18728 Registered: January 2001
Illuminati (33rd Degree)
A square horn loses pattern control in both axis at the same frequency. That's fine, but if you want a 90º horizontal pattern, then a square horn would have 90º vertical pattern too. I don't want that much energy in the vertical plane because it is a waste of energy, directed at the floor and ceiling. Reducing the pattern in the vertical plane reduces floor and ceiling reflections too.
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