Through holes for external attachment points are also provided. The front snout may be removed(unscrewed) to allow standard 1 3/8″ -18 screw mounting. Diaphragm assemblies are rim centered rather than pin mounted, for instant interchange ability and ease of field service.Mounting is provided for standard25 mm (1 in) three bolt pattern. Additionally the press-fit assembly and interlocking parts assure greater resistance to the mechanical shock. Phasing plug, throat exittube and diaphragm assemblies areidentical to the previous model.Īll cast parts and tolerances are held to the same levels traditionally associated with JBL designs. The mathematically determinedphasing plug consists of concentricexponential horns to minimize phasecancellations. The depth of the diamondpattern is closely controlled toprovide predictable frequencies forthe 2nd and 3rd normal resonancemodes and for the basic suspensionresonance. JBL’s exclusive suspension, consistingof a three-dimensional diamondpattern, reduces bendingstresses in the diaphragm supportstructure. Thistitanium diamond structure combinesthe ruggedness of phenolic andcomposite-type diaphragms with theoutstanding frequency response offragile aluminum and exotic metaldiaphragms. The model 2426H is a professionalquality high frequency compressiondriver which incorporates JBL’stitanium diamond diaphragm.
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