visit the HLA
Technological Breakthrough in
High-Powered Tour Sound
HLA Series tour sound loudspeakers provide innovation and performance
breakthroughs in every key design area. The HLA system consists
of the main three-way cabinet, the HLA-4895, and the matching
HLA-4897A subwoofer. In the HLA Series, every detail of a tour
sound loudspeaker system has been carefully rethought and re-engineered
to maximize output and control while reducing weight, truck
space and setup time. But most importantly, the
HLA Series cabinets sound great!
4895 3-way cabinet and the HLA 4897A subwoofer
Ideal Array Element Design Trapezoidal SpaceFrame
"cabinets" are constructed of welded aluminum tubing
to reduce weight and simplify rigging.
Rigging System Channels that accept the hardware
used to fly the HLA series cabinets are built into the cabinets
Control HLA-Series systems use JBL's DSC280
Digital Controller for cross-over and internal
Full Bandwidth Three-Way High-Power
Controlled-Directivity Loudspeaker System
Technology Transducers Differential Drive, Direct
Cooled, cone transducers for very low weight and high
output with very low power compression. In addition to being
1/3 the weight of conventional transducers, the transducers
are also more efficient so a system typically requires fewer
amplifiers to achieve the same output levels.
Waveguide The HLA-4895 includes a positionable
Waveguide assembly that tilts within the SpaceFrame allowing
quick setup to achieve precise coverage of any venue without
tilting the cabinets themselves.
Waveguide Optimized Aperture
Design provides wideband, controlled coverage with very low
Power Transducers Dual 800 W Differential Drive
Transducers provide high output with low distortion and minimum
Composite / SpaceFrame Design
Composite enclosure structurally mounted in a trapezoidal
aluminum SpaceFrame reduces enclosure losses for greater output,
lowers weight. This cabinet is built to the same dimensions
as the HLA-4895 full-range cabinet, allowing subwoofers and
full-range elements to easily be used anywhere in an array.
Dynamics Aperture Vent Design
Virtually eliminates vent compression resulting in
higher output, extended bandwidth and lower distortion.
Systems Design Details
continuing commitment to innovation and providing audio professionals
the highest technology is demonstrated by the HLA System. Instead
of simply repackaging an existing system design, JBL engineers
took a different approach. Each element of tour sound systems
was analyzed to find new and innovative solutions to the challenges
faced by today's tour sound companies and performers. The result
is a system that provides high power, high directivity, low
distortion, low weight and great sound.
the 4895 full bandwidth cabinet and the 4897A subwoofer replace
the traditional wooden enclosure with a trapezoidal aluminum
SpaceFrame to reduce weight. When flying the HLA cabinets, the
SpaceFrame distributes the weight throughout the entire cabinet
rather than concentrating stress at mounting points. The 4895
full-range system features a positionable Waveguide assembly
that tilts within the SpaceFrame. This makes it possible achieve
precise coverage while maintaing a clean, straight hang that
simplifies setup while helping to improve sightlines.
two new drivers were developed for the system:
4895 full bandwidth box features the Differential Drive Direct
Cooled, cone transducer. This unit utilizes a neodynum
magnet structure and unique dual coil design to provide very
high output with very low power compression and distortion
at 1/3 the weight of a comparable conventional transducer.
4897A sub-woofer, uses JBL's Differential Drive 2258H
transducers with a 800 Watt AES power rating (each transducer)
one of the reasons why the 4897A has 3 dB more output
over its full bandwidth, and up to 6 dB more full power output
below 50 Hz than competitive high power subwoofers.
combination of innovative design and breakthrough technology
adds to a system that simply must be seen and heard to be believed!
© 2004 JBL Professional.
All rights reserved.