Specifications

The second example shows the same three enclosures arranged in a spherical array

with independent aiming capabilities (fig. 9). Note that the direct side wall energy is

lessened with this array type which also uses distributed delay enclosures for the three

rear audience areas. This distributed delay configuration will also offer better localization

to the stage for the respective seating areas. This is the preferred design direction.

MORE INFORMATION

For more information on designing loudspeaker system arrays, refer to JBL Audio Engineering

for Sound Reinforcement by John Eargle and Chris Foreman (Hal Leonard Publications, 2002)

Additional system design information, including advanced design concepts, can be found at the

"Technical Library” available on the JBL Professional website at

http://www.jblpro.com/catalog/general/technicallibrary.aspx?CatID=27&Run=1

For additional information on low frequency control refer to –

Basic PD5322 and PD5122 Array Applications; Technical Notes Volume 1, Number 32 and

Forward Steered Arrays in Precision Directivity Speaker Systems; Technical Notes Volume 1,

Number 28.

Information on amplifier recommendations found in this guide can be obtained at the Crown

website: http://www.crownaudio.com/

Information on DSP hardware recommendations found in this guide can be obtained at the BSS

Audio, Crown and dbx websites. All websites are accessible from: http://jblpro.com/

Figure 9: Spherical array used for main

cluster location with distributed delay

enclosures showing reduced side wall

energy and better coverage. In this room

example the spherical array allows better

coverage to the three front seating areas

than is possible with the planar array.