Harman JBL PROFESSIONAL MAX Serie Manual De Usuario página 16

POSITIONING AND INSTALLATION
Using the vertical support at 0°
To use the tilt-free vertical stand, press the two
buttons below the powered speaker and adjust to
the 0° position indicated.
Use the bracket in the 0° position for open areas
(no end wall) and the 7.5° position when in closed
spaces close to walls. This angle adjustment has
the purpose of improving the acoustic perception
in the place of use of the powered speaker,
because when we have a wall at the end of the
room and we leave the support in the 0° position,
the sound reaches the wall and is reflected, which
degrades the acoustic quality.
Using the vertical support at 7.5°
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To use the vertical support with an inclination of 7.5°, press the
two buttons below the equipment and adjust to the desired
position, tilting the speaker, then release the buttons.