Hi,
i have a question about the gasket of paper between the throat 2360 T and the horn.
Is it right, that the slot in the gasket is smaller than the opening at the throat and horn?
Dieter
Hi,
i have a question about the gasket of paper between the throat 2360 T and the horn.
Is it right, that the slot in the gasket is smaller than the opening at the throat and horn?
Dieter
Daphile; MUSETEC AUDIO (L.K.S. Audio) MH-DA005 - USB; Accuphase E-460; Everest DD66000
Hi Dieter
- A paper gasket shouldn't be sticking into the horns' throat area. If it is then someone was sloppy with its' placement or the paper cutting machine wasn't sized correctly .
- The right amount of "free-edge" thin paper in the throat area coupled with high nodal pressure will = " Very large KAZOO " generator
regards <> Earl K
Hi boputnam & Earl K,
look at the PDF. There is a gasket between throat and the horn ( nr.: 60718-01.
At my horn the slot in the paper is smaller than the slot in the throat.
regards Dieter
Daphile; MUSETEC AUDIO (L.K.S. Audio) MH-DA005 - USB; Accuphase E-460; Everest DD66000
Hi Dieter
I'm ( of course ) in agreement that the gasket should be used - but - just about always , the gaskets' hole size should match that of the horn flare and that of the metal throat piece ( another compression node ) . Making it smaller increasing the velocity at that one node - followed by an abrupt expansion into the horn bells' loading slot. That isn't the way horns are usually designed. That'll cause a cancellation somewhere in the passband of the horn response.
If you're asking; is this a modfication that JBL came up with to address ( ie cancel ) an unwanted horn mode ? - well - someone else will have to answer that question.
Why not make up another gasket of the correct apeture, make some detailed response measurements of the two aperture types , note the differences caused by the two aperture sizes and let us know the results . I'd like to know what you find.
You can purchase the necessary gasket materials from a local automotive supplier.
regards <> Earl K
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