User manual

Electro-Voice EVA Series User Manual14

3.0 Designing an EVA Array (cont’)

Figure 6 shows the Report tab of the EVADA spreadsheet, showing such details as hang points (in this

example, pinhole 0 on the centerline of the EVA-CG coupler grid), type of hang point (main or pull-

back), load (lb or kg), modules in the array and their vertical aiming angles (note that the module inclination

angle is measured at the rear panel of the module).

The Subwoofers tab allows the user to assemble subwoofer arrays and assess the inevitable multiple-

source interference that occurs when two or more arrays are displaced horizontally. This is done by

showing the horizontal polar response of subwoofer arrays at three frequencies. The default frequencies

are 100, 80 and 60 Hz but can be changed. The option of changing the polarity of each subwoofer and

inserting up to 9.9 ms of delay in any one group of subwoofers is available. These options may be found to

smooth the interference patterns.

The Preferences tab allows the user to change the colors associated with each array element or module.

Refer to the Preferences help ﬁle for details.

Figure 6:

EVADA

Report tab, with many physical array details