JBL Compression Driver Diaphragm Polarity?

[mefisto]

Hi sebeckman,

thank you for your generous offer.

The driver's core is 2450SL, and I have two diaphragm types - D16R2441 and another, a designation of which I do not know, it is Aquaplassed (dome only) Ti diaphragm depicted in my first post.

The wave-guide is, unfortunately, nonstandard in that I have modified B52 - PHRN1014 by (i) replacing the 1 in throat with re-calculated and printed throat 1.5 in and (ii) adding a round-over to the mouth, cf. the attached pictures. As such, I do not believe that there is anything comparable.

Saying that, for my current purpose a measurement of the driver only, e.g., SPL, Impedance would be sufficient.

Kindest regards,

M

[sebackman]

Hi,

I have no idea how such horn would load a 2450SL driver.

Attached is the impedance (curve and data) of a 2450SL coated smooth Titanium (here called "D2" out of 9 drivers measured) on a JBL VTX F15 wave guide #5006815.

Kind regards
//Rob

[mefisto]

Hi sebackman,

thank you very much.

Kindest regards,

M