JBL 2447H 1 1/2In Compression Driver - 8 Ohms
The Model 2447H/J is a 38 mm
(1.5) 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 four 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
provides predictable normal resonance modes, and radial reinforcing
ribs increase diaphragm stiffness. This
diaphragm design combined with the
Coherent Wave phasing plug
increases the 2447's output in the 5
kHz to 20 kHz range.
High temperature voice coil former materials and adhesives enable the 2447H/J to handle high power levels over
extended periods of time. The voice coils themselves are
identical to previous JBL models, so that impedance and
network matching will be the same. After manufacture, the
frequency response of each transducer is tested for conformity to JBL's rigid performance standards.
The model 2447H/J is ruggedly constructed to withstand
the rigors of both fixed installations and touring applications. All tolerances are held to the same high levels traditionally associated with JBL designs. The JBL manufacturing
process permits the use of rim centered diaphragms for
instant interchangeability and ease of field service.
- 100 watts continuous program above 500 Hz
- 150 watts continuous program at 1 kHz and higher
- Coherent Wave phasing plug design for increased high frequency output
- 100 mm (4 in) pure titanium diaphragm with radial-rib topology
- 38 mm (1.5") throat exit diameter
- 100 mm (4 in) edgewound aluminum voice coil
Please see .pdf in the manual tab above more info.