EAW D S A 2 3 0, D S A 2 5 0 owner manual 4 . 1 S y s t e m O ve r v i e w, Description, Chapter

Chapter 4 Description

4 . 1 S y s t e m O ve r v i e w

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	D S A S E R I E S M O D E L S	Figure 4.1.1 DSA250 & DSA230
DSA250: Full range, 2-way, loudspeaker system
DSA230: Low frequency and voice-only loudspeaker system
4 . 1 . 2	A C O U S T I C A L B E N E F I T S

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 P H Y S I C A L B E N E F I T S

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.

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