Eaw D S A 2 3 0 User Manual download pdf (Page 15)

The required signal processing, accomplished by DSP (digital signal

processing), involves parametric equalization, signal delay, frequency

filtering, gain, and limiting. These parameters are individually adjusted by

the DSAPilot for each transducer in each loudspeaker. The available DSP

resources provide a broad range of possible coverage patterns and SPL

control over distance as well as the “voicing” required for exceptional

music reproduction.

The DSA allows multiple loudspeakers to be arrayed as a cluster at a single

location. This allows a greater range of beamwidths, SPL, pattern control,

and low frequency output than a single DSA loudspeaker can provide. The

DSAPilot treats the cluster as if it were a single loudspeaker, precluding the

complexities normally associated with designing clusters.

4.5 DSAPilot

The DSAPilot, used to set the loudspeaker signal processing parameters, is

based on software originally developed by EAW engineers for the KF750,

KF760, and, in particular, the KF900 Series products. These products

require precise but variable pattern control and a high degree of fidelity for

speech and music in projects that range from small houses of worship to

the newest super-stadiums. Sophisticated mathematical algorithms were

developed to determine the necessary adjustments to achieve these results

for both multiple transducers and multiple loudspeaker clusters. This math

was incorporated into highly user-friendly software. Thoroughly tested and

refined in successful, real-world applications, these techniques have been

applied to the DSA Series to achieve the same high degree of pattern

control, musicality, and ease of setup.

Though highly complex, the DSAPilot’s mathematics work behind the

scenes. Because of this, the DSAPilot makes adjusting the signal processing

deceptively simple. In fact, no acoustical knowledge is required to set up

and adjust one or multiple DSA Series loudspeakers. The only information

needed for the DSAPilot to perform its magic is the physical layout of the

listening area, loudspeaker mounting location, and desired coverage area.

4.6 Low Frequency Performance

While the DSA250 is designed as a full-range loudspeaker, addition of the

companion DSA230 increases directionality, and output at lower frequencies.

DSA230s extend directional control to lower frequencies using classical line

array theory by extending the length of the overall array. This is done by

mounting the DSA230 directly below or above a DSA250 to form a longer line

of low frequency transducers. In addition, the increased number of low

frequency transducers couple to increase the low frequency output capability.

4.7 Comparison to Traditional Products

A major benefit of the DSA Series is achieving desired down angle coverage

from a line source that is mounted flat to a vertical surface. The inclusion

of power amplifiers and dedicated signal processing to each transducer

provide the DSA Series with performance and capabilities well beyond

those of typical multi-way loudspeakers and traditional, voice-range line

arrays. The DSA Series can provide much better directional control, higher

output, and wider frequency response at less cost. Significantly smaller

sizes and weights, plus straightforward mounting and wiring options pay

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