JBL 4894-90 User Manual
High Power Two-Way
Array Series
Key Features:
Wide Coverage Angle Design
90° Horizontal Horn Pattern for
Non-arrayed Applications
High Technology Transducers
355 mm (14 in) Ultra-low Distortion
Neodymium Woofer with Unique
Gap Topology,
38 mm (1½ in) exit, 100 mm (4 in)
diaphragm Neodymium
Compression Driver
Secure Array Flying Ergonomics -
S.A.F.E.™
Internal Steel Braces accept
Optional Truss Module and
Hardware
Integrally Designed with JBL
Array Series Controllers
Choose Analog, or Digital
Controller for optimum system
performance
Versatile
Concert and Theater Reinforcement, A/V Presentation, High
Power Installations
Array Series Systems
JBL’s commitment of providing audio
professionals the best tools for their
work continues with the Array Series.
JBL Array Series systems provide the
ultimate performance for touring and
fixed installations. The high power,
compact 4894-90 provides smooth,
predictable coverage and response
from a single box. It combines ease of,
transport with the flexibility to fly or
install quickly and safely. Integration
of advanced design high power trans-
ducers, a new generation of horns,
and advanced control electronics pro-
vides clearly superior performance.
Reliability is designed in, without
having to relay on intrusive signal
processing.
Components
Array Series builds upon a solid foun-
dation: more than 40 years of JBL
transducer expertise and engineering.
The 355 mm (14 in) low frequency
transducer represents JBL’s commit-
ment to research. New technology
includes a unique deep copper-
sleeved gap low-distortion motor
structure topology, coupled to Vented
Gap Cooling (VGC
1
U.S. Patent #5,042,072
TM )1
to produce
4894-90
Loudspeaker System
Specifications:
Frequency Response (± 3 dB)1:
Sensitivity:
Recommended Amplifier Power2:
High Frequency:
Low Frequency:
Nominal Coverage:
LOW FREQUENCY TRANSDUCERS:
Nominal Diameter: 355 mm (14 in)
Nominal Impedance:
Power Rating:
Voice Coil:
Features:
HIGH FREQUENCY TRANSDUCER:
Throat Diameter:
Nominal Impedance: 8 ohms
Power Rating:
Diaphragm:
Voice Coil:
Features: Neodymium magnet motor structure
HIGH FREQUENCY HORN:
Material: Die cast aluminum
Coverage: 90° horizontal, 40° vertical
ENCLOSURE:
Material:
Flying System: S.A.F.E. -JBL proprietary, modular, certified
Connectors:
Dimensions:
H x W x D
Net Weight:
¹ Half Space measurement.
² Recommended Power Amplifier
voltage available to amplifiers, although lower power amplifiers may be utilized The 4894 system is capable of significantly greater peak power input.
ratings
are a guide
46 Hz - 18 kHz
100 dB (1 W, 1
300 W at 8 ohms
600 W at 8 ohms each transducer, 1200 W total
90° horizontal, 40° vertical
Two transducers with separate pinouts
8 ohms each
600 watts AES, 50 Hz to 500 Hz, 2400 W
Peak each transducer. 1200 W total
100 mm (4 in) edgewound aluminum ribbon
Ultra linear, neodymium magnet motor structure
Vented Gap Cooling
38 mm (1½ in) exit
75 watts AES, 1 kHz to 10 kHz, 300 W peak
100 mm (4 in) pure titanium
100 mm (4 in) edgewound aluminum ribbon
Type: Optimized Aperture™ Flat-Front Bi-Radial
Type: Vented, 45” included angle trapezoid
19 mm (¾ in), 13 ply hardwood
Finish: Black textured paint
Grille:
16 ga. perforated steel, foam backed
Parallel 8 pin Neutrik -pins 1 ± LF1, pins 2 ± LF2,
pins 3 ± HF
1066 x 394 x 362 mm
(42 x 15½ x 14¼ in)
47.3 kg (104 lb)
for amplifier selection considering normal program material and line
m)
®
4894-90 High Power Two-way Loudspeaker System
the accurate reproduction at high power levels with
minimal power compression. A new 38 mm
exit neodymium high frequency compression driver
with Coherent Wave’” phasing plug and 100 mm (4 in)
titanium diaphragm delivers low distortion response to
beyond 20 kHz. A 90° Optimized Aperture™ Flat-Front
Bi-Radial® horn² provides accurate pattern control over
its entire bandwidth.
(1%
in)
S.A.F.E.™ Secure Array Flying Ergonomics
Important for both portable and fixed installation appli-
¼
x 20 threads, 4 places,
top and bottom
cations is the ability to rig a cluster quickly, but with
absolute safety. The 4894-90 has four internal steel braces
that are ready to accept optional bolt-on truss modules.
An array to provide desired coverage can be quickly
assembled using a few basic fittings. Ultimate break
strength of this method exceeds 2700 kg (6000 lb). A complete line of hardware is available for many applications
including flying subwoofers in an array.
Active Control
Optional S.A.F.E. Fittings
The ASC24 provides cost effective analog signal process-
ing with simple setup. The DSC280 offers additional
precision, flexibility, and user convenience available
only in the digital domain. Both provide superior high
level sound quality.
Enclosure
Extremely rigid 19 mm ( ¾ in) 13 ply hardwood, a
textured black paint finish, and a perforated 16 ga.
steel grille form a durable package.
Applications
The 4894-90 is ideal for applications requiring high
fidelity, high level music reproduction, or high intelligi-
bility speech reinforcement. For applications requiring
very low frequency reinforcement the 4893 subwoofer’s
dimensions match the 4894-90 allowing convenient
integration.
² U.S. Patent #4,308,932
Module
-TM 12
OPTIONAL S.A.F.E.
FLYING HARDWARE:
Truss Module: Cabinet flying truss
Shackle Mount:
Quick Release Pin: Locks S.A.F.E. components
Stacking Bracket: Vertically attaches two truss modules
Locking Steel Caribiner:
Net Weight loudspeaker with
Truss Modules installed:
JBL continually engages in research related to product improvement New materials, pro-
duction methods, and design refinements are introduced into existing products without
notice as a routine expression of that philosophy. For this reason, any current JBL product
may differ in some respect from its published description but will always equal or exceed
the original design specifications unless otherwise stated.
Attaches to truss module to create
a lifting point
Used with shackle mount
51.8 kg (114 lb)
Stacking Bracket
ASF-SB12
JBL Professional
8500 Balboa Boulevard, P.O. Box 2200
Northridge, California 91329 U.S.A.
H
A Harman International Company
SS 4894-90
CRP 10M
9/95
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