EAW DSA250 & DSA230 owner manual N g i n e e r i n g D e s i g n, 4a Angled Radiation Pattern

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Ver: 30° Hor: 120°

Lspk: S1

Project: DSAMultipurpose-Tilt

Map: Direct SPL

Freq: 5000 Hz

[Third Octave Average]

Shadow Cast: No

Resolution = 1.0 m

4 . 4 E n g i n e e r i n g D e s i g n

The core acoustical design of the DSA Series dates back to the late 1930s in Harry Olson’s book, “Acoustical Engineering”. He showed that, by using different signal delays on the input to each transducer in a simple line array, the array’s main output lobe could be effectively “steered”. While this concept has certainly been used before, the design of the DSA Series goes far beyond this simple concept.

The engineering design for the DSA Series is certainly capable of “steering” the main output lobe, as per Olson. However, the shape of the lobe in the vertical plane is also variable. This allows changing the depth of the coverage to precisely fit the listening area thereby reducing troublesome near-to-far SPL differences.

A major advantage of DSA is the character of its radiation pattern. Contrary to what might be intuitively assumed, the DSA’s radiation pattern is not the same as simply down-tilting a loudspeaker that has the same horizontal and vertical beamwidths. The example EASE plots illustrate this difference.

Ver: 30° Hor: 120°

Lspk: S1

Project: DSAMultipurpose-Steer

Map: Direct SPL

Freq: 5000 Hz

[Third Octave Average]

Shadow Cast: No

Resolution = 1.0 m

Figure 4.4a Angled Radiation Pattern

Figure 4.4b DSA Steered Radiation Pattern

The radiation pattern of the conventionally, down-tilted loudspeaker has at least two problems. The geometry of the pattern results in inadequate coverage across the front area of the room. It also focuses a distinct line of energy along the side wall. This energy is nearly at the same loudness as the floor seating area. The sound reflections off the upper part of the wall will arrive at many listeners late enough to impair intelligibility. These reflections add to the direct sound and cause the higher intensity sound seen at the rear , even though these areas are further from the loudspeaker.

By contrast, the radiation pattern of the DSA loudspeaker is far more consistent across the entire floor area. The energy it directs to the sidewalls is not only lower in level, but creates a very different reflection pattern. The sound reflected off the wall will be largely directed down into the floor or nearby listeners along the sides, arriving early enough to actually enhance intelligibility.

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Contents Page Introduction Safety Acoustical Installation OperationIntroduction Safety ChapterE N E R a L P R E C a U T I O N S E t u r n i n g P r o d u c t s t o E AW Chapter UnpackingH i p p i n g D a m a g e Co m p u t e r Co n t r o l Co n n e c t i o n E s c r i p t i o nU d i o S i g n a l Co n n e c t i o n T w e e n L o u d s p e a k e r sAC M a i n s Installation Hy s i c a l InstallationG n a l P r o c e s s i n g 2X 3/8-16 X 2 LGO U S T I C a L B E N E F I T S Y s t e m O ve r v i e wA S E R I E S M O D E L S A t u r e s E C T R I C a L B E N E F I T SP p l i c a t i o n s H Y S I C a LN g i n e e r i n g D e s i g n 4a Angled Radiation PatternCo m p a r i s o n t o Tr a d i t i o n a l P r o d u c t s S a P i l o tO w Fr e q u e n c y Pe r f o r m a n c e Installation E s i g n i n g D S a S y s t e m sU D I O S I G N a L C O N N E C T I O N O M P U T E R C O N T R O L C O N N E C T I O NEIA Daisy Chaining Computer and Audio Signals BET Ween ClustersCo b r a N e t N e t w o r k Co n n e c t i o n s OFFLO U D S P E a K E R I N T E R FA C E A B L I N GU D I O / C O M P U T E R I N T E R FA C E Multiple LoudspeakersC M a i n s P o w e r C o n n e c t i o n O W E R O N / O F FLIF R o u n d i n gEIA OFF 2 Signal End / Power End 3 DSA Cluster Configurations N S TA L L AT I O N O P T I O N S N G L I N G E N C LO S U R E SO U N T I N G H E I G H T WA L L B R a C K E T I N S TA L L AT I O N7a Wall Bracket Spacing N C LO S U R E B R a C K E T I N S TA L L AT I O N N C LO S U R E I N S TA L L AT I O N9b Retainer Bolt Installation N i t i a l S e t U p Identification LEDE D I N D I C AT O R OperationO W E R M a N a G E M E N T I G N a L M O N I T O R I N G I G N a L P R O C E S S I N G S E T T I N G S O r m a l O p e r a t i o nO W E R I N G U P P e r a t i o n a l ‘ D O S ’ a n d ‘ D O N T S ’ O w t o C o n t a c t E AW A p t e r 7 M a i n t e n a n c e a n d S e r v i c eA r r a n t y E R I O D I C P H Y S I C a L I N S P E C T I O N S A p t e r 8 a p p e n d i c e sN s p e c t i o n s a n d M a i n t e n a n c e E R F O R M a N C E T E S T I N GTroubleshooting DSA250 OnlyEIA-485 I a 4 8 5 N e t w o r k A B L I N G N O T E SU p p o r t F o r C o b r a N e t E R M I N AT I O N N O T E SBack Right Side Back Front 15.8 mm 101.5 mm 70.0 mm WA L L B R a C K E T107.3 mm 4X Ø 0.38 65 mmPage R t N o . R D 0 0 8 6 B 2 7 a U G 0

DSA250 & DSA230 specifications

The EAW DSA250 and DSA230 are state-of-the-art powered loudspeakers designed for professional audio applications, offering high performance in a variety of environments. Both models deliver exceptional sound quality, ensuring clear audio reproduction for live events, installations, and portable use.

The EAW DSA250 features a robust bi-amplified design with a powerful 2500 watts of peak power output. This loudspeaker is equipped with a custom-designed 15-inch woofer, delivering deep and impactful low frequencies. Additionally, it boasts a 1.4-inch titanium compression driver that provides smooth mids and crisp highs, ensuring a well-balanced sound profile across the frequency spectrum.

On the other hand, the EAW DSA230 is engineered for similar high-performance needs but comes with a slightly more compact design. The DSA230 incorporates a 12-inch woofer, which still produces rich low-end sound, making it ideal for smaller venues or for use as a stage monitor. It features a 1-inch compression driver, which provides excellent vocal clarity and intelligibility.

Both models are equipped with advanced digital signal processing (DSP), allowing for optimized performance through precise loudspeaker modeling. The DSP offers various preset configurations tailored to different acoustic environments, allowing users to select the ideal settings for their specific applications. Additionally, the built-in EQ settings facilitate precise sound tuning, enabling users to adapt to various challenges presented by live sound environments.

One standout feature of the DSA series is the integration of the EAW FOCUS technology, which ensures consistent coverage and dynamic response across wide areas. This innovative technology also helps to minimize feedback and interference, making it a reliable choice for both performers and audio engineers.

The construction of both models is rugged, designed to withstand the rigors of touring while maintaining a professional appearance. They come with a sleek and practical enclosure design, featuring convenient mounting options for versatile deployment.

In summary, the EAW DSA250 and DSA230 loudspeakers are exemplary examples of advanced audio engineering, combining powerful amplification, precise DSP management, and robust build quality. With their exceptional sound reproduction, these models are ideal for professionals seeking reliable and high-performance audio solutions in diverse applications.
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