Horns in small detail and how we put them in our speakers.

After being out and about recently in the wide world of audio many conversations were encountered about horns. Since I like horns and to talk about them, certain terms are used which should be conventional. The first of which what kind of horn has what name and how they compare to each other. Here is a well recognised comparison.

A common term which is missing from this chart is the "Spherical" horn profile.

Some say it is the Kugellwellen, others the Tractrix. It is actually closer to the Exponential lying closer to it than the Le Cleac'h. This, I have seen, is commonly misunderstood.

Here is a horn created with JMLC's expansion for a particular driver optimising for its exit angle and frequency range including the coefficient T expansion.

The roll back has been argued by armchair theorists as superfluous since the crossover point is ususally higher than the mouth cut-off frequency however in practice this has not been my experience. The roll back reduces mouth reflection and I believe is in part responsible for it being one of the most natural and best sounding of horns.

Not only that but it looks nice as well.

Some other things we do a little different are rear wave treatments.

Instead of attempting to eliminate rear wave energy with dampening our goal is to distribute it. This means not only diffracting gross reflections into small ones but also using shape to proportion them harmonically.

Pressurised construction allows the structure to be rigid and resonant resistant.

The cabinet is impregnated with resin as well as reinforced.

Front panel preparation.

Final Inspection and bottom plate assembly.

Here is the horn installed complete with its rollback.

Binding posts.

Completed Speakers.

This is the Mojo.

 Model One and Model Three.

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