JBL HLA 4895 Owner's Manual page 32

Horn loaded array system
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widest possible dispersion with minimal interference between adjacent speakers. At this extremely wide coverage
angle only one speaker is heard at each listening position throughout the entire horizontal coverage of the array.
The next increment of horizontal coverage opens the back corners of adjacent speakers by 5 degrees
(25° splay). This optimum horizontal splay angle provides the smoothest, most transparent coverage using slight
overlap. The response is even throughout the intended angle of horizontal coverage. This splay provides a
horizontal coverage angle of 65 degrees from two adjacent speakers. Adding a third speaker at this angle
increases coverage to about 97 degrees, and a fourth speaker at this angle increases coverage to 130 degrees
horizontal.
The entire Multiband Waveguide and its transducer magazine inside the aluminum SpaceFrame can
be tilted 7.5 or 15 degrees. Tilting the waveguides in the top row of an array can increase vertical coverage of the
array to 45 degrees.
Inverting the 4895 speakers in the bottom row of an array allows waveguides in the bottom row to be
angled down by 7.5 or 15 degrees. The vertical coverage angle can thus be increased to 45 degrees, with up to 30
degrees of down-wards coverage. Vertical coverage can increase to 45 degrees, with up to 30° of "down" coverage.
(For additional information on this topic, see "Tilting the Waveguide" in Section 6)
With the speakers in the bottom row inverted, both the top and bottom rows can be tilted in opposite
directions tilted in opposite directions to extend their combined vertical coverage to 45°, 52.5°, or 60°, depending
on the tilt angles used.
Three rows of 4895 speakers in an array can provide vertical coverage through an angle of 60 degrees
by inverting the bottom row of speakers and tilting the Waveguides in both the top and bottom row.
Note: The 4895 and the 4897 subwoofer can be interchangeably combined in arrays. When 4897
subwoofers are used in multiples, the relative response at lower frequencies increases by 3 dB with each doubling
of the number of units.
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