User manual

Electro-Voice EVA Series User Manual

1.0 Introduction

The Electro-Voice EVA (Expandable Vertical Array) loudspeaker systems or line-array modules represent

an important step in line-array technology for small- and medium-scale ﬁxed-installation sound reinforce-

ment. The various models are designed to signiﬁcantly simplify the physical assembly of a line array. Also,

arrays of EVA full-range modules are designed to be powered from one ampliﬁer channel, the necessary

crossover and EQ functions accomplished with sophisticated passive networks. The individual loudspeak-

er drivers, Hydra™ plane-wave generators, acoustic waveguides, enclosures and rigging hardware were

all designed speciﬁcally for the EVA product line to not only achieve the highest acoustic output with the

highest ﬁdelity but also produce a precise wavefront from each element to achieve state-of-the-art line-

array performance. The EVA subwoofer modules are designed to compliment both the appearance and

performance of the EVA full-range modules in applications where additional low-frequency output is de-

sired from a ﬂown array. A brief description of the product line is included below. The various EVA series

modules are shown in Figure 1 with key dimensions and features.

Although the EVA full-range modules shown in Figure 1 are not physically symmetrical, their acoustic polar

responses are substantially symmetrical. Thus, stereo left and right arrays or left-center-right arrays may

be constructed with the modules in their normal right-side-up orientation as shown in Figure 1. However,

should the user desire, the module attachment points are such that mirror-image left-right arrays can be

made by constructing one array with its modules turned upside down with respect to the views of

Figure 1.

Each EVA full-range module contains two separate, vertically stacked line-array elements splayed within

the module at one-half the included vertical angle of the vertically trapezoidal enclosure. The two ele-

ments of each module consist of two vertically stacked EVS2008 8-inch (203 mm) LF drivers (one per

element) and two pairs of DH2005 1.25-inch-diaphragm (32 mm) HF drivers (one pair per element).

Each HF driver pair is mounted on a Hydra™ plane-wave generator, the two of which are vertically stacked

and splayed with their respective elements. Each module effectively functions as one self-contained zone

within an array, with the added beneﬁt of the internal shading network being able to attenuate either the

upper or lower HF driver pair by 3 dB to help smooth transition between zones when needed.

EVA-2082S/906: two-way, LF/HF line-array module with a 90° horizontal x 6° vertical coverage pattern

(for long throws) and passive crossover/HF-shading/EQ network. The enclosure is trapezoidal in the verti-

cal plane with a 6° total included angle. The two line-array elements contained in the module are vertically

splayed by 3°.

EVA-2082S/920: two-way, LF/HF line-array module with a 90° horizontal x 20° vertical coverage pat-

tern (for short throws) and passive crossover/HF-shading/EQ network. The enclosure is trapezoidal in

the vertical plane with a 20° total included angle. The two line-array elements contained in the module are

vertically splayed by 10°.

EVA-2082S/126: two-way, LF/HF line-array module with a 120° horizontal x 6° vertical coverage pattern

(for long throws) and passive crossover/HF-shading/EQ network. The enclosure is trapezoidal in the verti-

cal plane with a 6° total included angle. The two line-array elements contained in the module are vertically

splayed by 3°.