JBL 2447J 1.5" High Frequency Compression Driver, 16 Ohm, 500Hz to 20kHz Frequency Range

The JBL 2447J is a 38 mm (1-1/2") exit diameter addition to JBL's family of professional quality compression drivers. The 38 mm exit allows the Coherent Wave phasing plug to directly couple with Optimized Aperture Bi-Radial horns to provide lower distortion and better coverage control to 20 kHz than previous designs. In addition to improving performance the 38 mm design also reduces size and weight.

The Coherent Wave phasing plug structure has 4 equal length passages to provide in-phase summation of diaphragm output at the 38 mm exit. This optimized configuration produces coherent acoustical power up to much higher frequencies than more conventional designs. The diaphragm design includes JBL's exclusive three-dimensional diamond pattern surround tuned to reduce fatigue inducing stresses in the membrane and support structure.

This JBL 2447J provides predictable normal resonance modes and radial reinforcing ribs increase diaphragm stiffness. This diaphragm design combined with the Coherent Wave phasing plug increases JBL 2447J's output in the 5 kHz to 20 kHz range.