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whgeiger
09-08-2011, 12:59 PM
Need this angle for the design of a horn for a JBL 2451 Compression Driver

Also a listing of Throat Diameter and Taper Angle of other JBL Compression Drivers would be helpful as well.

Regards,

WHG

pos
09-09-2011, 04:57 AM
The 2451 is an throat-less driver, so the ideal initial angle for the horn is 0 :
http://www.jblpro.com/catalog/support/getfile.aspx?docid=298&doctype=3

whgeiger
09-09-2011, 04:59 PM
The 2451 is an throat-less driver, so the ideal initial angle for the horn is 0 :
http://www.jblpro.com/catalog/support/getfile.aspx?docid=298&doctype=3


The JBL spec., figures 1a and 1b, are incorrect. They show a step where the horn joins the driver; but of course, there isn’t one. That is why I asked the question.
Regards,

WHG

Robh3606
09-09-2011, 05:36 PM
figures 1a and 1b, are incorrect.

How so?

The way I read it 1A is the older design so 2440/2441/2445. 1B are the newer 2246/2451 which are throatless?

Rob:)

whgeiger
09-09-2011, 07:13 PM
How so?

The way I read it 1A is the older design so 2440/2441/2445. 1B are the newer 2246/2451 which are throatless?

Rob:)

Lines representing the inner horn walls are missing in both figures. They should line up with the outer wall of the outer phase plug slit. As drawn there is step between what is shown. N.B., the slits are represented by the smaller spaces between the curved lines appearing in both phase plug figures.

Regards,

WHG