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DSA250 Design
The design engineering phase of the DSA project began with the assumption that a single DSA250 loudspeaker would meet the minimum performance requirements. To achieve the necessary broadband pattern control, the LF section’s line length was specified to provide meaningful pattern control to around 300 Hz. EAW engineers created a line comprising (8)4-in LF cones, slightly offset to help minimize enclosure height. This closer vertical spacing creates a higher resolution that optimizes DSP control.
Output and driver spacing drove the HF section design where EAW engineers loaded (8)1-in soft dome tweeters with a single, very shallow, multi-cell horn. The goal was to keep the drivers’ acoustic centers as close as possible. Again, this high-resolution design optimized DSP control to substantially higher frequency than previously achieved. Indeed, actual performance exceeded the engineer’s expectations with steerability to 16 kHz.
Each DSA250 loudspeaker delivers a fixed 120° horizontal coverage pattern. This wide-angled coverage allows for fairly wide horizontal spacing between DSA250 modules in an installation with the systems vertical steerability virtually eliminating the dead spots in between.
To simplify installation, set up, and long term use, engineers designed all signal processing and amplification as internal components of the loudspeaker system. Each DSA250 loudspeaker delivers 480 Watts of power ((8)40 W LF, (8)20 W HF) as well as 16 channels of complex DSP that includes conventional HPF and LPF, delay, PEQ and limiting as well as proprietary filters developed specifically to facilitate steering. The internal power and DSP modules also incorporate a robust driver and electronic protection system. DSA loudspeakers use standard EIA-485 (RS-485) network communications cable/connectors with an optional CobraNet™ interface available. When connected, all DSA Series loudspeakers in an installation comprise a network in which DSA Pilot recognizes each individual loudspeaker as well as arrays of loudspeakers
acting as a single unit.
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| Single DSA250 with 120° beam showing octave band polars, 500 Hz to 8 kHz |
Single DSA250 with 75° beam showing octave band polars, 500 Hz to 8 kHz |
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| Single DSA250 with 30° beam showing octave band polars, 500 Hz to 8kHz |
Single DSA250 with 30° beam and 15°steering showing octave band polars, 500 Hz to 8kHz |
Next - DSA250 Deisgn
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EAW engineers created a line comprising (8)4-in LF cones, slightly offset to help minimize enclosure height. This closer vertical spacing creates a higher resolution that optimizes DSP control.
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(8)1-in soft dome tweeters with a single, very shallow, multi-cell horn.
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Each DSA250 loudspeaker delivers 480 Watts of power ((8) 40 W LF, (8)20 W HF) as well as 16 channels of complex DSP.
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