Amate Audio Joker Active Systems Manual De Usuario página 21

Joker Active systems
3.4. Live applications (mobile)
Fig.6. Mobile applications
To obtain a clear and free-distortion reproduction, it is advisable to place the mid-
high units on top of the low units keeping between them an approximate height of
two meters. If such height cannot be achieved nor maintained, it is advisable to use
the classical tripod for each mid-high cabinet and leave the low units on the floor.
WARNING!!! For installations that suffer from acoustic problems and in which it is
necessary to reinforce the response in the low frequencies, it is advisable to group
all the subwoofers together in the same point. By this way, cancellations will be
avoided and a higher acoustic pressure level will be obtained.
3.5. Asymmetrical and rotatable horns
The JK10A, JK12A, JK15A, JK46A and JK318A models incorporate an asymmetrical
dispersion horn which will optimise coverage either in horizontal or vertical position.
Fig.7. Rotatable horn
Good coverage of audiences often is a conflicting combination of:
*wide coverage for the closest audience (short throw)
*narrow coverage for distant areas (long throw)
The asymmetrical dispersion horn coverage varies from "short throw" to "long throw"
along the vertical axis (keeping a constant vertical directivity). In conclusion,
directivity feature of (50º to 100º(H), 55º(V)) can be seen as if the horn itself had
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For a mobile application, whether
it is an outdoor
installation, the common location
is to place the bass units (one or
two per channel) on each side of
the stage.
To rotate the horn, unscrewed the
frontal grille, and then, unscrewed
the four fixing screws of the horn.
Rotate it 90 degrees taking care
of the wires. Screw the horn
again and finally place the frontal
grille in its right position.
Oct 2015
or indoor
Amate Audio