Section 4
Over view
This loudspeaker is intended for professional use. The construction, components, and hardware
have been designed to provide robust, reliable performance for its intended application. Please
ensure that you fully understand proper installation and operation before use.
4 . 1
U s i n g t h e L o u d s p e a k e r
You need to perform the following general tasks to properly put the loudspeaker into service. The
details for each task are provided in this manual.
1. Design and install a rigging or mounting system to support the loudspeaker in its intended
location and aimed in the desired direction.
2. Connect a line-level audio signal to the loudspeaker.
3. Connect the loudspeaker to an AC mains supply as specified for the particular model.
4. Set-up loudspeaker controls, adjust system gain and any external signal processing as needed
to maximize the overall audio system’s performance.
5. Provide training to operate the loudspeaker within its limits.
6. Provide regular inspection and maintenance to maintain the integrity of the installation and the
performance of the loudspeaker system.
4 . 2
D e s c r i p t i o n
JF
NT
/KF
NT
loudspeakers are designed to meet the requirements and demands of portable
applications as well as permanent installations. The integral electronics are based on proven, high-
efficiency amplifier technology, with field-replaceable amplifier modules. The loudspeakers need
to be connected to an AC mains supply and a line-level audio signal. The internal DSP is factory
preset to provide correct and consistent performance.
4.2.1
MODELS
The 2-way, JF
NT
loudspeakers are available in both 12-inch and 15-inch LF driver formats.
The 3-way KF
NT
loudspeakers are available in single-10-inch and dual-10-inch formats.
Different beamwidth are offered to meet typical coverage requirements in their intended
applications. The trapezoidal design of the enclosures makes them easy to use as a main PA
loudspeaker or as a floor wedge for stage monitor applications.
JF
NT
Models:
KF
NT
Models:
4.2.2
AMPLIFICATION
As is true of all professional loudspeaker systems, the performance of the JF
NT
/KF
NT
Series
loudspeakers depends on amplifiers delivering an adequate supply of clean power. To maximize
performance, the full-range JF
NT
loudspeakers are bi-amplified, meaning the LF and HF drivers each
have their own signal processing and built-in, high-efficiency amplifier. KF3xx
NT
loudspeakers are bi-
directional using a passive mid/high crossover.
K200nt loudspeakers are tri-amplified.
Full-range
JF26
NT
JF29
NT
JF56
NT
JF59
NT
60º x 45º
12 in cone, 3 in voice coil
12 in cone, 3 in voice coil
3 in / 1.4 in exit compression driver
3 in / 1.4 in exit compression driver
3 in / 1.4 in exit compression driver
3 in / 1.4 in exit compression driver
15 in cone, 4 in voice coil
15 in cone, 4 in voice coil
90º x 45º
60º x 45º
90º x 45º
Nominal
Beamwidths H x V
LF Driver
H F Driver
Loudspeaker
KF200NT
Other Full-range
LF Amplifier
MF Amplifier
500 W
1000 W
500 W
N/A
HF Amplifier
500 W
500W
Full-range
KF200
NT
KF364
NT
KF394
NT
100º conical
2x 10 in cone, 2.5 in voice coil
10 in cone, 2.5 in voice coil
8 in cone, 2 in voice coil, 1.73 in/0.75 in exit coaxial driver
3.5 / 1.4 in exit compression driver
2x 10 in cone, 2.5 in voice coil
60º x 45º
90º x 45º
Nominal
Beamwidths H x V
LF Driver
MF / H F Driver
3.5 / 1.4 in exit compression driver
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