EAW's new Digitally Steerable Array, or DSA? Series, represents a radical step forward for small to mid-sized permanent installation applications. In essence, the DSA Series simplifies the KF900/PPST technology that permits digital steering and aiming of an array's output and adapts it to applications where column loudspeakers would typically be specified.
Like a KF900 array, each driver in a DSA Series loudspeaker enjoys its own individual amplification and digital signal processing (DSP). Using EAW's free DSA Pilot software program, users can vary the vertical coverage pattern from 15deg to 120deg as well as aim the coverage 30deg.
Unlike the KF900 system, however, all this power is housed in a compact, column speaker-type enclosure that requires no external amplification or processing. Users only need to connect AC power, audio signal, and network communications Cable
s. DSA Pilot recognizes each loudspeaker connected to the network and allows users to control all of them from a single interface.
This complex, powerful technology has been years in the making, so a review of the engineering goals and design concepts will help the reader better understand the genesis of these amazing loudspeaker systems.
Used Eastern Acoustic Works
Eastern Acoustic Works (EAW) is the global leader in high-performance, professional loudspeaker system design and manufacture. Based in an historic mill complex in Whitinsville, Massachusetts, USA, EAW gives audio professionals a comprehensive tool kit that helps them deliver customized sound reinforcement solutions for venues and events around the world.
- The lux (symbol: lx) is the SI derived unit of illuminance or illumination. It is equal to one lumen per square metre.
The difference between the lux and the lumen is that the lux takes i. Used . nto account the area over which the luminous flux is spread. 1000 lumens, concentrated into an area of one square metre, lights up that square metre with an illuminance of 1000 lux. The same . Used . 1000 lumens, spread out over ten square metres, produces a dimmer illuminance of only 100 lux.
Achieving an illuminance of 500 lux might be possible in a home kitchen with a single fluorescent lig...Processor Units
- A processor unit is an individual piece of equipment, usually a computer, used to process editing infomation.. Used . . Used . ...Dimmer
- Dimmers are devices used to vary the voltage running to a light. By decreasing or increasing the voltage to the lamp it is possible to vary the intensity of the lamp. Changes in intensity are called “. Used . fades” and can be “fade ups” or “fade downs.” Although variable-voltage devices are used for various purposes, the term dimmer is generally associated with lighting control. Small dimmers are. Used . seen more and more in the home. These have traditionally been actuated by direct control. The advent of X-10 technology is making remote control of home dimmers possible. A digital signal is imposed on the ho...Color Changers
- A conventional lighting fixture with a remotely controlled colored changeable filter over the lens. There are three kinds of mechanisms used in color changers, a wheel with lens sized holes into which. Used . colored gells can be placed, multiple fixed filters that can be moved in and out of the beam to mix the colors and a scroller which uses continuous, usually dichroic, filters to mix an even . Used . greater number of colors.
- A cabinet is a loudspeaker enclosure designed to prevent sound waves from the rear of the speaker combining with the sound waves from the front of the speaker creating
interference that would c. Used . ause the efficiency of the speaker to be compromised.. Used . ...
Used Cabinet Speakers
Speaker cabinets are specially engineered units in which audio equipment such as speakers and their associated hardware are mounted into. These cabinets can be very basic affairs, little more than a wooden case with no additional features other than one port for inputting a sound cable, or they can be incredibly complex cabinets with features ranging from numerous ports and internal baffles to acoustic insulation and composite materials used in their construction.
The main point of housing loud speakers and PA speakers in cabinets is not simply to make them look neat and tidy, although that is one benefit. The cabinet actually provides a useful function in preventing competing sound waves from interacting with each other and distorting the end product. This is because the diaphragm that the speaker driver uses to create the sound we hear generates sound waves both at the front and the rear, and these will be out of sync with each other, thus creating a distortion if not dealt with adequately.
Other side effects include echo and reverberation, as the sound waves would reach the audience at slightly different times as they travel on different paths through the loud speakers towards them.
In addition to minimizing these unwanted side effects, loud speakerâ??s cabinets also help to manage the vibrations which are caused by the driver frame, as well as the buildup of heat that is associated with amplifiers, driver voice coils and other moving components in PA speakers.