The 3 inch series
is a unique addition to JBL's family of Bi-Radial® horns. The design
goals were to provide very high level sound pressure at low distortion
over the bandwidth of 300 Hz to above 3 kHz, with very uniform coverage.
Extensive computer modeling including proprietary JBL Horn Design
software, finite element analysis and boundary element analysis was
used to optimize the coverage pattern, distortion, and size. This
application of advanced technology helped create the Optimized Aperture
family of Bi-Radial® horns.
Coupling of the
compression driver phase plug directly to a reduced length horn throat,
that terminates into an optimized diffraction aperture, results in
unmatched output with a minimum distortion levels. Constant horizontal
and vertical coverage patterns over a bandwidth of 300 Hz to 4 kHz
allow precise control of critical vocal range energy. Greater intelligibility
is more easily achieved while reducing problems of lobing and comb