Deciding Which Grid Configuration To Use With An Eva Array; Standard Grid With Or Without Second Spreader Bar - Electro-Voice EVA-2082S/906EVA-2082S/920EVA-2082S/126 User Manual

5.0 EVA Rigging System (cont')
While the majority of EVA applications will be accommodated with full-range arrays of three or four mod-
ules, up to eight EVA-2082S and/or EVA-1151D modules may be suspended together up to a combined
maximum loudspeaker column weight of 720 lb (327 kg). When EVA-2151D subwoofers are used, the
combined maximum loudspeaker column weight is 840 lb (381 kg), or five EVA-2082S modules under
two EVA-2151D modules. When subwoofers are used, they must be installed at the top of the array.

5.2 Deciding Which Grid Configuration to use with an EVA Array

5.21 Standard Grid with or without Second Spreader Bar

The EVA-SG2 standard grid is shown in Figure 15. This grid is appropriate for that majority of applica-
tions covered by a three- to four-module full-range array. It comes with one spreader bar and two side
arms, plus the two shoulder bolts and nylon washers required to assemble the three parts into a grid. The
spreader bar has three 0.813-inch (20.6 mm) holes through it, one near each end and one in the center,
to which the chain hoist(s) or other device(s) used to lift the array into position can be attached. Using the
two end points provides horizontal stability for the array. Using the center point alone will probably require
a tie-off to stabilize the horizontal position of the array.
Spreader Bar
Standard (EVA-SG2)
Sidearm
Standard (EVA-SG2)
Sidearm
EVA Module(s)
(Not included with Grid)
Figure 15:
EVA-SG2 grid (down angle of the array is determined by
the front-to-back position of the spreader bar)
When the standard grid with its single spreader bar is used, the down angle of the array is determined by
the front-to-back attachment position of the spreader bar. This information is provided by Electro-Voice's
EVA Design Assistant (EVADA™), a function of the array makeup and desired vertical aiming. See section
3.0 Designing an EVA Array.
For arrays (1) larger than four EVA modules or (2) three- to-four-box arrays which require more down
angle than what is available with a standard grid, the extended grid is usually required. See section 5.22
Extended Grid with or without Second Spreader Bar.
24 Electro-Voice EVA Series User Manual