Unity/Synergy horn

[454Casull]

Is it possible to create a round conical Unity horn? My assumption is that the normal horns have square walls because it's easier to mount the mids. Is this correct?

[Pallas]

Originally Posted by 454Casull

Is it possible to create a round conical Unity horn?

Yorkville Sound: Unity™

Originally Posted by 454Casull

My assumption is that the normal horns have square walls because it's easier to mount the mids. Is this correct?

No real knowledge to that point, but my guess is some combination of array ability and easier construction in small quantities (sheet materials rather than a molded part).

[454Casull]

Thanks, didn't know Yorkville made conical ones.

Since a conical horn is very close in shape to an OS waveguide, could an OS waveguide be designed with 2, 3, 4... side-entry mids like in a Unity horn? Perhaps a B&C DE5 or DE7 (smaller throat for higher cutoff with larger mouth) with two mids, two midbasses?

[jason_watkins]

I recall Tom and others saying in the past that one advantage of the square horn is that pressures are lower in the corners. This helped reduce the HF's interaction with the midrange driver ports.

[paulspencer]

Jason hit the nail on the head. That is the downside with the Yorkville Unity. From a DIY perspective, an axisymmetric is more difficult to build and even more so if you want a different aspect ratio.

[Patrick Bateman]

Originally Posted by 454Casull

Thanks, didn't know Yorkville made conical ones.

Since a conical horn is very close in shape to an OS waveguide, could an OS waveguide be designed with 2, 3, 4... side-entry mids like in a Unity horn? Perhaps a B&C DE5 or DE7 (smaller throat for higher cutoff with larger mouth) with two mids, two midbasses?

Most of my Unity horns were elliptical oblate spheroidal.

Check out my threads on audiogroupforum, diymobileaudio, and my own forum. (forum.audiopsychosis.com)

They worked fine for me, and I prefer EOS because it has a number of advantages:

#1 - EOS is less prone to the on-axis "hole" that plagues OS waveguides
#2 - EOS has less diffraction than a conical horn
#3 - For reasons that I'm too lazy to document here, Unity and Synergy horns work a lot better when the average coverage angle is narrow. IE, a 90x90 Unity horn won't work as well as a 60x45 Unity horn. My EOS waveguide was 108 degrees by 72 degrees IIRC

[paulspencer]

I found that out as well with the sims, so built a 60 x 60 first. Now working on a 60 x 90 with 6 drivers and aiming to get down as low as I can, probably about 220 Hz.