Eaw DSA250 & DSA230 User Manual download pdf (Page 11)

Chapter 4 Description

4.1 System Overview

DSA Series loudspeakers are variable directivity, self-powered line arrays. Each

loudspeaker’s vertical beamwidth is determined by the settings of an internal

DSP (digital signal processor) and power amplifier for each transducer. This

provides complete, on-site control over the range of possible vertical

beamwidth patterns.

EAW’s Windows-based DSAPilot is used to set the coverage required for each

loudspeaker or loudspeaker cluster. The user-friendly DSAPilot optimizes the

required signal processing for the design. This data is then uploaded to the DSA

Series loudspeakers in the system. The DSAPilot normally communicates with the

loudspeakers using EIA-485*. An optional CobraNet™ network interface is available.

*Formerly known as RS-485 (Recommended Standard 485)

4.1.1 DSA SERIES MODELS

DSA250: Full range, 2-way, loudspeaker system

DSA230: Low frequency and voice-only loudspeaker system

4.1.2 ACOUSTICAL BENEFITS

Each loudspeaker can be electronically adjusted on-site to direct sound

primarily where needed. Unwanted sound reflections from room

surfaces can be reduced, improving the direct to reverberant sound

ratio. This, in turn, can significantly increase speech intelligibility.

Asymmetrical pattern control can provide consistent SPL in situations

with HIGH near-to-far listener distance ratios. User adjustable level

control, equalization, and compression, are provided on each of the

two audio inputs. For situations with multiple locations, overall signal

delay for each loudspeaker cluster is also provided.

4.1.3 PHYSICAL BENEFITS

The DSA Series loudspeakers are physically narrow and quite shallow,

providing a low profile to reduce their impact on architecture. Their

normal mounting position is specifically designed to be flat against a

vertical surface. This considerably reduces installation complexity. The

DSA Series design permits several loudspeakers to be easily arrayed in

one location as a cluster. This affords additional capabilities including

higher output and extremely narrow vertical coverage, as well as extended

pattern control, and output at lower frequencies.

DSA Series enclosures are constructed of a powder-coated, extruded

aluminum body (also used as the amplifier heat sink), high-impact

polystyrene end caps, a thick PVC baffle, and a finely perforated

steel grille. This construction is designed for years of trouble-free

use. The appearance is designed to blend attractively with a variety

of architecture. The enclosure finish is a neutral white. The grille is

powder-coated steel, with a perforation style that appears similar to a

cloth grille at typical in-use distances. Installation hardware is included to

facilitate installation in most applications.

Figure 4.1.1 DSA250 & DSA230

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Eaw DSA250 & DSA230 User Manual Page 11

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